播放gif动画 （用的是三方的框架）

//    CGFloat WH= 60;

//    CGFloat imX= (kScreenWidth - WH) / 2;

//    CGFloat imY= (kScreenHeight - WH) / 2 - 80;

//    NSString *path = [[NSBundle mainBundle] pathForResource:@"loading" ofType:@"gif"];

//    NSURL *bannerUrl = [NSURL fileURLWithPath:path];

//    self.netErrorIcon = [[FLAnimatedImageView alloc]initWithFrame:CGRectMake(imX, imY, WH, WH)];

//    FLAnimatedImage *image = [FLAnimatedImage animatedImageWithGIFData:[NSData dataWithContentsOfURL:bannerUrl]];

//    self.netErrorIcon.contentMode = UIViewContentModeScaleToFill;

//    self.netErrorIcon.animatedImage = image;

//    [self.view addSubview:self.netErrorIcon];