iOS加载GIF动画

1、使用webView加载

NSString *path = [[NSBundle mainBundle] pathForResource:@"refreshing01" ofType:@"gif"];
    NSData *gifData = [NSData dataWithContentsOfFile:path];
    UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(kSCREEN_WIDTH*0.5-15, 15, 30, 30)];
    webView.scalesPageToFit = YES;
    [webView loadData:gifData MIMEType:@"image/gif" textEncodingName:@"" baseURL:[NSURL URLWithString:@""]];
    webView.backgroundColor = [UIColor clearColor];
    webView.opaque = NO;
    [self.view addSubview:webView];

2、使用ImageView加载

//将GIF图片分解成多张PNG图片
    //得到GIF图片的url
    NSURL *fileUrl = [[NSBundle mainBundle] URLForResource:@"refreshing01" withExtension:@"gif"];
    //将GIF图片转换成对应的图片源
    CGImageSourceRef gifSource = CGImageSourceCreateWithURL((CFURLRef) fileUrl, NULL);
    //获取其中图片源个数，即由多少帧图片组成
    size_t frameCount = CGImageSourceGetCount(gifSource);
    //定义数组存储拆分出来的图片
    NSMutableArray *frames = [[NSMutableArray alloc] init];
    for (size_t i = 0; i < frameCount; i++) {
        //从GIF图片中取出源图片
        CGImageRef imageRef = CGImageSourceCreateImageAtIndex(gifSource, i, NULL);
        //将图片源转换成UIimageView能使用的图片源
        UIImage *imageName = [UIImage imageWithCGImage:imageRef];
        //将图片加入数组中
        [frames addObject:imageName];
        CGImageRelease(imageRef);
    }
    UIImageView *gifImageView = [[UIImageView alloc] initWithFrame:CGRectMake(kSCREEN_WIDTH*0.5-15, 15, 30, 30)];
    //将图片数组加入UIImageView动画数组中
    gifImageView.animationImages = frames;
    //每次动画时长
    gifImageView.animationDuration = 1.3;
    //开启动画，此处没有调用播放次数接口，UIImageView默认播放次数为无限次，故这里不做处理
    [gifImageView startAnimating];
    [self.view addSubview:gifImageView];