簡單無腦，直接上圖：

圖片縮放切換.gif

簡單粗暴，直接上代碼：

<p><pre>
//加載3秒動畫
[UIView animateWithDuration:3 animations:^{
//CGAffineTransformScale的X為 -1 時，圖片左右反轉(zhuǎn)
self.imgView.transform = CGAffineTransformScale(self.imgView.transform, -1, 1);
//CGAffineTransformScale的Y為 -1 時，圖片上下反轉(zhuǎn)
self.imgView.transform = CGAffineTransformScale(self.imgView.transform, 1, -1);
}];
</pre></p>

<p><pre>
//延遲 1.5 秒切換圖片，并將圖片轉(zhuǎn)正
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
//此處是圖片的index，N為圖片總數(shù)
if (self.index == N) {

            self.index = 0;
        }else{
            
            self.index++;
        }
        
        //切換圖片
        self.imgView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%ld",self.index]];
        //轉(zhuǎn)正圖片
        self.imgView.transform = CGAffineTransformScale(self.imgView.transform, -1, 1);
        self.imgView.transform = CGAffineTransformScale(self.imgView.transform, 1, -1);

});
</pre></p>

偶然的嘗試，感覺很神奇?。。。?！