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git-subtree-dir: submodules/AsyncDisplayKit git-subtree-mainline: d06f423e0ed3df1fed9bd10d79ee312a9179b632 git-subtree-split: 02bedc12816e251ad71777f9d2578329b6d2bef6
104 lines
2.9 KiB
Objective-C
104 lines
2.9 KiB
Objective-C
//
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// ViewController.m
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// Texture
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//
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// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
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// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
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// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
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//
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#import "ViewController.h"
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#import <AsyncDisplayKit/AsyncDisplayKit.h>
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#import "PostNode.h"
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#import "SlowpokeImageNode.h"
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#import <AsyncDisplayKit/ASDisplayNode+Subclasses.h>
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@interface ViewController ()
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{
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PostNode *_postNode;
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SlowpokeImageNode *_imageNode;
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UIButton *_displayButton;
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}
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@end
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@implementation ViewController
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#pragma mark -
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#pragma mark UIViewController
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- (instancetype)init
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{
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if (!(self = [super init]))
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return nil;
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_displayButton = [UIButton buttonWithType:UIButtonTypeCustom];
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[_displayButton setTitle:@"Display me!" forState:UIControlStateNormal];
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[_displayButton addTarget:self action:@selector(onDisplayButton:) forControlEvents:UIControlEventTouchUpInside];
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UIColor *tintBlue = [UIColor colorWithRed:0 green:122/255.0 blue:1.0 alpha:1.0];
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[_displayButton setTitleColor:tintBlue forState:UIControlStateNormal];
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[_displayButton setTitleColor:[tintBlue colorWithAlphaComponent:0.5] forState:UIControlStateHighlighted];
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_displayButton.backgroundColor = [UIColor colorWithWhite:0.95 alpha:1.0];
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return self;
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}
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- (void)viewDidLoad
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{
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[super viewDidLoad];
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[self.view addSubview:_displayButton];
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}
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- (void)viewWillLayoutSubviews
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{
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CGFloat padding = 20.0;
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CGRect bounds = self.view.bounds;
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CGFloat constrainedWidth = CGRectGetWidth(bounds);
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CGSize constrainedSize = CGSizeMake(constrainedWidth - 2 * padding, CGFLOAT_MAX);
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CGSize postSize = [_postNode layoutThatFits:ASSizeRangeMake(CGSizeZero, constrainedSize)].size;
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CGSize imageSize = [_imageNode layoutThatFits:ASSizeRangeMake(CGSizeZero, constrainedSize)].size;
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_imageNode.frame = (CGRect){padding, padding, imageSize};
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_postNode.frame = (CGRect){padding, CGRectGetMaxY(_imageNode.frame) + 10.0, postSize};
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CGFloat buttonHeight = 55.0;
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_displayButton.frame = (CGRect){0.0, CGRectGetHeight(bounds) - buttonHeight, CGRectGetWidth(bounds), buttonHeight};
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}
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// this method is pretty gross and just for demonstration :]
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- (void)createAndDisplayNodes
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{
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[_imageNode.view removeFromSuperview];
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[_postNode.view removeFromSuperview];
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// ASImageNode gets placeholders by default
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_imageNode = [[SlowpokeImageNode alloc] init];
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_imageNode.image = [UIImage imageNamed:@"logo"];
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_postNode = [[PostNode alloc] init];
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// change to NO to see text placeholders, change to YES to see the parent placeholder
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// this placeholder will cover all subnodes while they are displaying, just a like a stage curtain!
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_postNode.placeholderEnabled = NO;
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[self.view addSubnode:_imageNode];
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[self.view addSubnode:_postNode];
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}
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#pragma mark -
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#pragma mark Actions
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- (void)onDisplayButton:(id)sender
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{
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[self createAndDisplayNodes];
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}
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@end
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