UIImage+GIF.m
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//
// UIImage+GIF.m
// LBGIFImage
//
// Created by Laurin Brandner on 06.01.12.
// Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//
#import "UIImage+GIF.h"
#import <ImageIO/ImageIO.h>
@implementation UIImage (GIF)
+ (UIImage *)sd_animatedGIFWithData:(NSData *)data
{
if (!data)
{
return nil;
}
CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)data, NULL);
size_t count = CGImageSourceGetCount(source);
UIImage *animatedImage;
if (count <= 1)
{
animatedImage = [[UIImage alloc] initWithData:data];
}
else
{
NSMutableArray *images = [NSMutableArray array];
NSTimeInterval duration = 0.0f;
for (size_t i = 0; i < count; i++)
{
CGImageRef image = CGImageSourceCreateImageAtIndex(source, i, NULL);
NSDictionary *frameProperties = CFBridgingRelease(CGImageSourceCopyPropertiesAtIndex(source, i, NULL));
duration += [[[frameProperties objectForKey:(NSString*)kCGImagePropertyGIFDictionary] objectForKey:(NSString*)kCGImagePropertyGIFDelayTime] doubleValue];
[images addObject:[UIImage imageWithCGImage:image scale:[UIScreen mainScreen].scale orientation:UIImageOrientationUp]];
CGImageRelease(image);
}
if (!duration)
{
duration = (1.0f/10.0f)*count;
}
animatedImage = [UIImage animatedImageWithImages:images duration:duration];
}
CFRelease(source);
return animatedImage;
}
+ (UIImage *)sd_animatedGIFNamed:(NSString *)name
{
CGFloat scale = [UIScreen mainScreen].scale;
if (scale > 1.0f)
{
NSString *retinaPath = [[NSBundle mainBundle] pathForResource:[name stringByAppendingString:@"@2x"] ofType:@"gif"];
NSData *data = [NSData dataWithContentsOfFile:retinaPath];
if (data)
{
return [UIImage sd_animatedGIFWithData:data];
}
NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:@"gif"];
data = [NSData dataWithContentsOfFile:path];
if (data)
{
return [UIImage sd_animatedGIFWithData:data];
}
return [UIImage imageNamed:name];
}
else
{
NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:@"gif"];
NSData *data = [NSData dataWithContentsOfFile:path];
if (data)
{
return [UIImage sd_animatedGIFWithData:data];
}
return [UIImage imageNamed:name];
}
}
- (UIImage *)sd_animatedImageByScalingAndCroppingToSize:(CGSize)size
{
if (CGSizeEqualToSize(self.size, size) || CGSizeEqualToSize(size, CGSizeZero))
{
return self;
}
CGSize scaledSize = size;
CGPoint thumbnailPoint = CGPointZero;
CGFloat widthFactor = size.width / self.size.width;
CGFloat heightFactor = size.height / self.size.height;
CGFloat scaleFactor = (widthFactor > heightFactor) ? widthFactor :heightFactor;
scaledSize.width = self.size.width * scaleFactor;
scaledSize.height = self.size.height * scaleFactor;
if (widthFactor > heightFactor)
{
thumbnailPoint.y = (size.height - scaledSize.height) * 0.5;
}
else if (widthFactor < heightFactor)
{
thumbnailPoint.x = (size.width - scaledSize.width) * 0.5;
}
NSMutableArray *scaledImages = [NSMutableArray array];
UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
for (UIImage *image in self.images)
{
[image drawInRect:CGRectMake(thumbnailPoint.x, thumbnailPoint.y, scaledSize.width, scaledSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
[scaledImages addObject:newImage];
}
UIGraphicsEndImageContext();
return [UIImage animatedImageWithImages:scaledImages duration:self.duration];
}
@end