将GIF图转化为UIImageView可展示的动画数组

如何将gif转化为图片数组，ios开发

 

//引入头文件
#import <ImageIO/ImageIO.h>

- (NSMutableArray *)loadGifArray
{
    NSString *path = [[NSBundle mainBundle] pathForResource:@"pross" ofType:@"gif"];
    NSData *data = [NSData dataWithContentsOfFile:path];
    //目标数组
    NSMutableArray *images = [self praseGIFDataToImageArray:data];

    return images;
}

//gif转化为imageView动画数组
- (NSMutableArray *)praseGIFDataToImageArray:(NSData *)data;
{
    NSMutableArray *frames = [[NSMutableArray alloc] init];
    CGImageSourceRef src = CGImageSourceCreateWithData((CFDataRef)data, NULL);
    CGFloat animationTime = 0.f;
    if (src) {
        size_t l = CGImageSourceGetCount(src);
        frames = [NSMutableArray arrayWithCapacity:l];
        for (size_t i = 0; i < l; i++) {
            CGImageRef img = CGImageSourceCreateImageAtIndex(src, i, NULL);
            NSDictionary *properties = (NSDictionary *)CFBridgingRelease(CGImageSourceCopyPropertiesAtIndex(src, i, NULL));
            NSDictionary *frameProperties = [properties objectForKey:(NSString *)kCGImagePropertyGIFDictionary];
            NSNumber *delayTime = [frameProperties objectForKey:(NSString *)kCGImagePropertyGIFUnclampedDelayTime];
            animationTime += [delayTime floatValue];
            if (img) {
                [frames addObject:[UIImage imageWithCGImage:img]];
                CGImageRelease(img);
            }
        }
        CFRelease(src);
    }
    return frames;
}