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505 lines
26 KiB
Objective-C
505 lines
26 KiB
Objective-C
//
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// PhotoTableViewCell.m
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// Sample
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//
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// Created by Hannah Troisi on 2/17/16.
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//
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// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#import "PhotoTableViewCell.h"
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#import "Utilities.h"
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#import "PINImageView+PINRemoteImage.h"
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#import "PINButton+PINRemoteImage.h"
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#import "CommentView.h"
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#define DEBUG_PHOTOCELL_LAYOUT 0
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#define USE_UIKIT_AUTOLAYOUT 1
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#define USE_UIKIT_MANUAL_LAYOUT !USE_UIKIT_AUTOLAYOUT
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#define HEADER_HEIGHT 50
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#define USER_IMAGE_HEIGHT 30
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#define HORIZONTAL_BUFFER 10
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#define VERTICAL_BUFFER 5
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#define FONT_SIZE 14
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@implementation PhotoTableViewCell
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{
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PhotoModel *_photoModel;
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CommentView *_photoCommentsView;
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UIImageView *_userAvatarImageView;
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UIImageView *_photoImageView;
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UILabel *_userNameLabel;
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UILabel *_photoLocationLabel;
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UILabel *_photoTimeIntervalSincePostLabel;
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UILabel *_photoLikesLabel;
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UILabel *_photoDescriptionLabel;
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NSLayoutConstraint *_userNameYPositionWithPhotoLocation;
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NSLayoutConstraint *_userNameYPositionWithoutPhotoLocation;
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NSLayoutConstraint *_photoLocationYPosition;
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}
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#pragma mark - Class Methods
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+ (CGFloat)heightForPhotoModel:(PhotoModel *)photo withWidth:(CGFloat)width;
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{
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CGFloat photoHeight = width;
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UIFont *font = [UIFont systemFontOfSize:FONT_SIZE];
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CGFloat likesHeight = roundf([font lineHeight]);
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NSAttributedString *descriptionAttrString = [photo descriptionAttributedStringWithFontSize:FONT_SIZE];
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CGFloat availableWidth = (width - HORIZONTAL_BUFFER * 2);
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CGFloat descriptionHeight = [descriptionAttrString boundingRectWithSize:CGSizeMake(availableWidth, CGFLOAT_MAX)
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options:NSStringDrawingUsesLineFragmentOrigin
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context:nil].size.height;
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CGFloat commentViewHeight = [CommentView heightForCommentFeedModel:photo.commentFeed withWidth:availableWidth];
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return HEADER_HEIGHT + photoHeight + likesHeight + descriptionHeight + commentViewHeight + (4 * VERTICAL_BUFFER);
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}
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#pragma mark - Lifecycle
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- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
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{
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self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
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if (self) {
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_photoCommentsView = [[CommentView alloc] init];
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_userAvatarImageView = [[UIImageView alloc] init];
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_photoImageView = [[UIImageView alloc] init];
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_userNameLabel = [[UILabel alloc] init];
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_photoLocationLabel = [[UILabel alloc] init];
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_photoTimeIntervalSincePostLabel = [[UILabel alloc] init];
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_photoLikesLabel = [[UILabel alloc] init];
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_photoDescriptionLabel = [[UILabel alloc] init];
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_photoDescriptionLabel.numberOfLines = 3;
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[self addSubview:_photoCommentsView];
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[self addSubview:_userAvatarImageView];
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[self addSubview:_photoImageView];
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[self addSubview:_userNameLabel];
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[self addSubview:_photoLocationLabel];
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[self addSubview:_photoTimeIntervalSincePostLabel];
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[self addSubview:_photoLikesLabel];
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[self addSubview:_photoDescriptionLabel];
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#if USE_UIKIT_AUTOLAYOUT
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[_photoCommentsView setTranslatesAutoresizingMaskIntoConstraints:NO];
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[_userAvatarImageView setTranslatesAutoresizingMaskIntoConstraints:NO];
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[_photoImageView setTranslatesAutoresizingMaskIntoConstraints:NO];
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[_userNameLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
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[_photoLocationLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
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[_photoTimeIntervalSincePostLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
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[_photoLikesLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
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[_photoDescriptionLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
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[_photoCommentsView setTranslatesAutoresizingMaskIntoConstraints:NO];
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[self setupConstraints];
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[self updateConstraints];
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#endif
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#if DEBUG_PHOTOCELL_LAYOUT
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_userAvatarImageView.backgroundColor = [UIColor greenColor];
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_userNameLabel.backgroundColor = [UIColor greenColor];
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_photoLocationLabel.backgroundColor = [UIColor greenColor];
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_photoTimeIntervalSincePostLabel.backgroundColor = [UIColor greenColor];
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_photoCommentsView.backgroundColor = [UIColor greenColor];
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_photoDescriptionLabel.backgroundColor = [UIColor greenColor];
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_photoLikesLabel.backgroundColor = [UIColor greenColor];
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#endif
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}
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return self;
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}
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-(void)setFrame:(CGRect)frame
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{
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[super setFrame:frame];
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}
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- (void)setupConstraints
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{
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// _userAvatarImageView
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_userAvatarImageView
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attribute:NSLayoutAttributeLeft
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView.superview
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attribute:NSLayoutAttributeLeft
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multiplier:1.0
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constant:HORIZONTAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_userAvatarImageView
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView.superview
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attribute:NSLayoutAttributeTop
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multiplier:1.0
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constant:HORIZONTAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_userAvatarImageView
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:nil
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attribute:NSLayoutAttributeNotAnAttribute
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multiplier:0.0
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constant:USER_IMAGE_HEIGHT]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_userAvatarImageView
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attribute:NSLayoutAttributeHeight
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView
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attribute:NSLayoutAttributeWidth
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multiplier:1.0
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constant:0.0]];
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// _userNameLabel
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_userNameLabel
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attribute:NSLayoutAttributeLeft
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView
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attribute:NSLayoutAttributeRight
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multiplier:1.0
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constant:HORIZONTAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_userNameLabel
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attribute:NSLayoutAttributeRight
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relatedBy:NSLayoutRelationLessThanOrEqual
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toItem:_photoTimeIntervalSincePostLabel
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attribute:NSLayoutAttributeLeft
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multiplier:1.0
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constant:-HORIZONTAL_BUFFER]];
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_userNameYPositionWithoutPhotoLocation = [NSLayoutConstraint constraintWithItem:_userNameLabel
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attribute:NSLayoutAttributeCenterY
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView
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attribute:NSLayoutAttributeCenterY
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multiplier:1.0
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constant:0.0];
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[self addConstraint:_userNameYPositionWithoutPhotoLocation];
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_userNameYPositionWithPhotoLocation = [NSLayoutConstraint constraintWithItem:_userNameLabel
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView
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attribute:NSLayoutAttributeTop
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multiplier:1.0
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constant:-2];
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_userNameYPositionWithPhotoLocation.active = NO;
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[self addConstraint:_userNameYPositionWithPhotoLocation];
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// _photoLocationLabel
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoLocationLabel
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attribute:NSLayoutAttributeLeft
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView
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attribute:NSLayoutAttributeRight
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multiplier:1.0
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constant:HORIZONTAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoLocationLabel
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attribute:NSLayoutAttributeRight
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relatedBy:NSLayoutRelationLessThanOrEqual
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toItem:_photoTimeIntervalSincePostLabel
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attribute:NSLayoutAttributeLeft
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multiplier:1.0
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constant:-HORIZONTAL_BUFFER]];
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_photoLocationYPosition = [NSLayoutConstraint constraintWithItem:_photoLocationLabel
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attribute:NSLayoutAttributeBottom
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView
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attribute:NSLayoutAttributeBottom
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multiplier:1.0
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constant:2];
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_photoLocationYPosition.active = NO;
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[self addConstraint:_photoLocationYPosition];
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// _photoTimeIntervalSincePostLabel
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoTimeIntervalSincePostLabel
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attribute:NSLayoutAttributeRight
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relatedBy:NSLayoutRelationEqual
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toItem:_photoTimeIntervalSincePostLabel.superview
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attribute:NSLayoutAttributeRight
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multiplier:1.0
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constant:-HORIZONTAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoTimeIntervalSincePostLabel
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attribute:NSLayoutAttributeCenterY
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relatedBy:NSLayoutRelationEqual
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toItem:_userAvatarImageView
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attribute:NSLayoutAttributeCenterY
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multiplier:1.0
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constant:0.0]];
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// _photoImageView
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoImageView
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:_photoImageView.superview
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attribute:NSLayoutAttributeTop
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multiplier:1.0
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constant:HEADER_HEIGHT]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoImageView
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:self
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attribute:NSLayoutAttributeWidth
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multiplier:1.0
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constant:0.0]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoImageView
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attribute:NSLayoutAttributeHeight
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relatedBy:NSLayoutRelationEqual
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toItem:_photoImageView
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attribute:NSLayoutAttributeWidth
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multiplier:1.0
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constant:0.0]];
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// _photoLikesLabel
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoLikesLabel
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:_photoImageView
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attribute:NSLayoutAttributeBottom
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multiplier:1.0
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constant:VERTICAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoLikesLabel
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attribute:NSLayoutAttributeLeft
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relatedBy:NSLayoutRelationEqual
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toItem:_photoLikesLabel.superview
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attribute:NSLayoutAttributeLeft
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multiplier:1.0
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constant:HORIZONTAL_BUFFER]];
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// _photoDescriptionLabel
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoDescriptionLabel
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:_photoLikesLabel
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attribute:NSLayoutAttributeBottom
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multiplier:1.0
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constant:VERTICAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoDescriptionLabel
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attribute:NSLayoutAttributeLeft
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relatedBy:NSLayoutRelationEqual
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toItem:_photoDescriptionLabel.superview
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attribute:NSLayoutAttributeLeft
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multiplier:1.0
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constant:HORIZONTAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoDescriptionLabel
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:_photoDescriptionLabel.superview
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attribute:NSLayoutAttributeWidth
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multiplier:1.0
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constant:-HORIZONTAL_BUFFER]];
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// _photoCommentsView
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoCommentsView
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attribute:NSLayoutAttributeTop
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relatedBy:NSLayoutRelationEqual
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toItem:_photoDescriptionLabel
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attribute:NSLayoutAttributeBottom
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multiplier:1.0
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constant:VERTICAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoCommentsView
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attribute:NSLayoutAttributeLeft
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relatedBy:NSLayoutRelationEqual
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toItem:_photoCommentsView.superview
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attribute:NSLayoutAttributeLeft
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multiplier:1.0
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constant:HORIZONTAL_BUFFER]];
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[self addConstraint:[NSLayoutConstraint constraintWithItem:_photoCommentsView
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attribute:NSLayoutAttributeWidth
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relatedBy:NSLayoutRelationEqual
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toItem:_photoCommentsView.superview
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attribute:NSLayoutAttributeWidth
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multiplier:1.0
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constant:-HORIZONTAL_BUFFER]];
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}
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- (void)updateConstraints
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{
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[super updateConstraints];
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if (_photoLocationLabel.attributedText) {
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_userNameYPositionWithoutPhotoLocation.active = NO;
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_userNameYPositionWithPhotoLocation.active = YES;
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_photoLocationYPosition.active = YES;
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} else {
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_userNameYPositionWithoutPhotoLocation.active = YES;
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_userNameYPositionWithPhotoLocation.active = NO;
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_photoLocationYPosition.active = NO;
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}
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}
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- (void)layoutSubviews
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{
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[super layoutSubviews];
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#if USE_UIKIT_PROGRAMMATIC_LAYOUT
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CGSize boundsSize = self.bounds.size;
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CGRect rect = CGRectMake(HORIZONTAL_BUFFER, (HEADER_HEIGHT - USER_IMAGE_HEIGHT) / 2.0,
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USER_IMAGE_HEIGHT, USER_IMAGE_HEIGHT);
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_userAvatarImageView.frame = rect;
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rect.size = _photoTimeIntervalSincePostLabel.bounds.size;
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rect.origin.x = boundsSize.width - HORIZONTAL_BUFFER - rect.size.width;
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rect.origin.y = (HEADER_HEIGHT - rect.size.height) / 2.0;
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_photoTimeIntervalSincePostLabel.frame = rect;
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CGFloat availableWidth = CGRectGetMinX(_photoTimeIntervalSincePostLabel.frame) - HORIZONTAL_BUFFER;
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rect.size = _userNameLabel.bounds.size;
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rect.size.width = MIN(availableWidth, rect.size.width);
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rect.origin.x = HORIZONTAL_BUFFER + USER_IMAGE_HEIGHT + HORIZONTAL_BUFFER;
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if (_photoLocationLabel.attributedText) {
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CGSize locationSize = _photoLocationLabel.bounds.size;
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locationSize.width = MIN(availableWidth, locationSize.width);
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rect.origin.y = (HEADER_HEIGHT - rect.size.height - locationSize.height) / 2.0;
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_userNameLabel.frame = rect;
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// FIXME: Name rects at least for this sub-condition
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rect.origin.y += rect.size.height;
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rect.size = locationSize;
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_photoLocationLabel.frame = rect;
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} else {
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rect.origin.y = (HEADER_HEIGHT - rect.size.height) / 2.0;
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_userNameLabel.frame = rect;
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}
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_photoImageView.frame = CGRectMake(0, HEADER_HEIGHT, boundsSize.width, boundsSize.width);
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// FIXME: Make PhotoCellFooterView
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rect.size = _photoLikesLabel.bounds.size;
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rect.origin = CGPointMake(HORIZONTAL_BUFFER, CGRectGetMaxY(_photoImageView.frame) + VERTICAL_BUFFER);
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_photoLikesLabel.frame = rect;
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rect.size = _photoDescriptionLabel.bounds.size;
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rect.size.width = MIN(boundsSize.width - HORIZONTAL_BUFFER * 2, rect.size.width);
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rect.origin.y = CGRectGetMaxY(_photoLikesLabel.frame) + VERTICAL_BUFFER;
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_photoDescriptionLabel.frame = rect;
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rect.size = _photoCommentsView.bounds.size;
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rect.size.width = boundsSize.width - HORIZONTAL_BUFFER * 2;
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rect.origin.y = CGRectGetMaxY(_photoDescriptionLabel.frame) + VERTICAL_BUFFER;
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_photoCommentsView.frame = rect;
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#endif
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}
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- (void)prepareForReuse
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{
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[super prepareForReuse];
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_photoCommentsView.frame = CGRectZero; // next cell might not have a _photoCommentsView
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[_photoCommentsView updateWithCommentFeedModel:nil];
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_userAvatarImageView.image = nil;
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_photoImageView.image = nil;
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_userNameLabel.attributedText = nil;
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_photoLocationLabel.attributedText = nil;
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_photoLocationLabel.frame = CGRectZero; // next cell might not have a _photoLocationLabel
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_photoTimeIntervalSincePostLabel.attributedText = nil;
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_photoLikesLabel.attributedText = nil;
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_photoDescriptionLabel.attributedText = nil;
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}
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#pragma mark - Instance Methods
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- (void)updateCellWithPhotoObject:(PhotoModel *)photo
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{
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_photoModel = photo;
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_userNameLabel.attributedText = [photo.ownerUserProfile usernameAttributedStringWithFontSize:FONT_SIZE];
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_photoTimeIntervalSincePostLabel.attributedText = [photo uploadDateAttributedStringWithFontSize:FONT_SIZE];
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_photoLikesLabel.attributedText = [photo likesAttributedStringWithFontSize:FONT_SIZE];
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_photoDescriptionLabel.attributedText = [photo descriptionAttributedStringWithFontSize:FONT_SIZE];
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[_userNameLabel sizeToFit];
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[_photoTimeIntervalSincePostLabel sizeToFit];
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[_photoLikesLabel sizeToFit];
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[_photoDescriptionLabel sizeToFit];
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CGRect rect = _photoDescriptionLabel.frame;
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CGFloat availableWidth = (self.bounds.size.width - HORIZONTAL_BUFFER * 2);
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rect.size = [_photoDescriptionLabel sizeThatFits:CGSizeMake(availableWidth, CGFLOAT_MAX)];
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_photoDescriptionLabel.frame = rect;
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[UIImage downloadImageForURL:photo.URL completion:^(UIImage *image) {
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_photoImageView.image = image;
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}];
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[self downloadAndProcessUserAvatarForPhoto:photo];
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[self loadCommentsForPhoto:photo];
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[self reverseGeocodeLocationForPhoto:photo];
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}
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- (void)loadCommentsForPhoto:(PhotoModel *)photo
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{
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if (photo.commentFeed.numberOfItemsInFeed > 0) {
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[_photoCommentsView updateWithCommentFeedModel:photo.commentFeed];
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CGRect frame = _photoCommentsView.frame;
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CGFloat availableWidth = (self.bounds.size.width - HORIZONTAL_BUFFER * 2);
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frame.size.width = availableWidth;
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frame.size.height = [CommentView heightForCommentFeedModel:photo.commentFeed withWidth:availableWidth];
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_photoCommentsView.frame = frame;
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[self setNeedsLayout];
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}
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}
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#pragma mark - Helper Methods
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- (void)downloadAndProcessUserAvatarForPhoto:(PhotoModel *)photo
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{
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[UIImage downloadImageForURL:photo.URL completion:^(UIImage *image) {
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CGSize profileImageSize = CGSizeMake(USER_IMAGE_HEIGHT, USER_IMAGE_HEIGHT);
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_userAvatarImageView.image = [image makeCircularImageWithSize:profileImageSize];
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}];
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}
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- (void)reverseGeocodeLocationForPhoto:(PhotoModel *)photo
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{
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[photo.location reverseGeocodedLocationWithCompletionBlock:^(LocationModel *locationModel) {
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// check and make sure this is still relevant for this cell (and not an old cell)
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// make sure to use _photoModel instance variable as photo may change when cell is reused,
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// where as local variable will never change
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if (locationModel == _photoModel.location) {
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_photoLocationLabel.attributedText = [photo locationAttributedStringWithFontSize:FONT_SIZE];
|
|
[_photoLocationLabel sizeToFit];
|
|
|
|
dispatch_async(dispatch_get_main_queue(), ^{
|
|
[self updateConstraints];
|
|
[self setNeedsLayout];
|
|
});
|
|
}
|
|
}];
|
|
}
|
|
|
|
@end
|