Swiftgram/examples/LayoutSpecExamples/Sample/Utilities.m

//
//  Utilities.m
//  Sample
//
//  Copyright (c) 2014-present, Facebook, Inc.  All rights reserved.
//  This source code is licensed under the BSD-style license found in the
//  LICENSE file in the root directory of this source tree. An additional grant
//  of patent rights can be found in the PATENTS file in the same directory.
//

#import "Utilities.h"

#define StrokeRoundedImages 0

@implementation UIColor (Additions)

+ (UIColor *)darkBlueColor
{
  return [UIColor colorWithRed:18.0/255.0 green:86.0/255.0 blue:136.0/255.0 alpha:1.0];
}

+ (UIColor *)lightBlueColor
{
  return [UIColor colorWithRed:0.0 green:122.0/255.0 blue:1.0 alpha:1.0];
}

@end

@implementation UIImage (Additions)

- (UIImage *)makeCircularImageWithSize:(CGSize)size withBorderWidth:(CGFloat)width
{
  // make a CGRect with the image's size
  CGRect circleRect = (CGRect) {CGPointZero, size};
  
  // begin the image context since we're not in a drawRect:
  UIGraphicsBeginImageContextWithOptions(circleRect.size, NO, 0);
  
  // create a UIBezierPath circle
  UIBezierPath *circle = [UIBezierPath bezierPathWithRoundedRect:circleRect cornerRadius:circleRect.size.width/2];
  
  // clip to the circle
  [circle addClip];
  
  [[UIColor whiteColor] set];
  [circle fill];
  
  // draw the image in the circleRect *AFTER* the context is clipped
  [self drawInRect:circleRect];
  
  // create a border (for white background pictures)
  if (width > 0) {
    circle.lineWidth = width;
    [[UIColor whiteColor] set];
    [circle stroke];
  }
  
  // get an image from the image context
  UIImage *roundedImage = UIGraphicsGetImageFromCurrentImageContext();
  
  // end the image context since we're not in a drawRect:
  UIGraphicsEndImageContext();
  
  return roundedImage;
}

@end

@implementation NSAttributedString (Additions)

+ (NSAttributedString *)attributedStringWithString:(NSString *)string fontSize:(CGFloat)size color:(nullable UIColor *)color
{
  if (string == nil) {
    return nil;
  }
  
  NSDictionary *attributes = @{NSForegroundColorAttributeName: color ? : [UIColor blackColor],
                               NSFontAttributeName: [UIFont boldSystemFontOfSize:size]};
  NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:string];
  [attributedString addAttributes:attributes range:NSMakeRange(0, string.length)];
  
  return attributedString;
}

@end