WKWebView 显示GIF

UIImageView *gifImg=[UIImageView creatImgViewWithFrame:CGRectMake(NZY_X(168), NZY_Y(42), NZY_W(40), NZY_H(40)) img:@"" supperView:self.searchBackView];
   NSData *gifData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"search" ofType:@"gif"]];
   WKWebView *webview=[[WKWebView alloc] initWithFrame:gifImg.bounds];
   webview.backgroundColor=[UIColor clearColor];
   webview.scrollView.scrollEnabled=NO;
   [webview loadData:gifData MIMEType:@"image/gif" characterEncodingName:@"" baseURL:[NSURL URLWithString:@""]];
   [gifImg addSubview:webview];