IOS GIF图片解析将gif图片解析成image数组

最新推荐文章于 2021-02-27 00:25:43 发布

转载最新推荐文章于 2021-02-27 00:25:43 发布 · 5.5k 阅读

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本文介绍如何使用Objective-C代码将GIF数据解析为图像数组的过程，包括获取GIF帧、计算动画时间以及释放资源。

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+ (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 *)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;
}