20、帧动画

    UIImageView *imgView = [[UIImageView alloc]initWithFrame:self.view.frame];
    
    //--动画数组
    imgView.animationImages      = 图片数组arr;
    //--动画时间
    imgView.animationDuration    = 3;
    //--动画重复次数 0 代表无限次
    imgView.animationRepeatCount = 0;
    //--开启动画
    [imgView startAnimating];
    
    [self.view addSubview:imgView];