XZ_iOS loading gif animation

1. Use webView to load local gif

Implementation code:

guard let bundle = Bundle.main.path(forResource: "duck.gif", ofType: nil),
            let gif = NSData.init(contentsOfFile: bundle)
        else {
            return
        }
        
        
        let webView = UIWebView.init(frame: CGRect(x: 50, y: 100, width: 280, height: 200))
        view.addSubview(webView)
        
        let url = URL(fileURLWithPath: bundle)

        webView.load(gif as Data, mimeType: "image/gif", textEncodingName: String(), baseURL: url)

OC code implementation: XZ_iOS uses WebView to achieve boot animation effect

2. Use SDWebImage to load local gif

guard let bundle = Bundle.main.path(forResource: "duck.gif", ofType: nil),
            let gif = NSData.init(contentsOfFile: bundle)
            else {
                return
        }
        
        let imageView = UIImageView.init(frame: CGRect(x: 50, y: 100, width: 280, height: 200))
        
        // load using imageData
        imageView.image = UIImage.sd_animatedGIF(with: gif as Data)
        
        view.addSubview(imageView)

3. Use  SDWebImage to load network gif

After Swift 4.0, using  the sd_setImageWithURL: placeholderImage: method in the UIImageView + WebCache class to load a GIF image can only load the first frame, and the image will not move. You need pod SDWebImage/GIF framework, and use FLAnimatedImageView as imageView to load gif. The reason is: After version 4.0, SDWebImage uses the  FLAnimatedImage class to process animations.

Code:

FLAnimatedImageView *_imageView;

_imageView.frame = CGRectMake(0, 0, size.width, size.height);
 [_imageView sd_setImageWithURL:_url placeholderImage:_placeholder options:0 progress:^(NSInteger receivedSize, NSInteger expectedSize, NSURL* targetUrl) {
            dispatch_async(dispatch_get_main_queue(), ^{
                _progressView.progress = (float)receivedSize / expectedSize;
            });
        } completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
            if (image == nil) {
                return;
            }
            [self setImagePosition:image];
        }];