设置动画，旋转

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   CGRect frame = self.imageView.frame;

    // 创建临时的图片，保留原图。一定要<span style="font-family: Menlo; font-size: 18px; color: rgb(187, 44, 162);">self</span><span style="font-family: Menlo; font-size: 18px;">.</span><span style="font-family: Menlo; font-size: 18px; color: rgb(79, 129, 135);">imageView</span><span style="font-family: Menlo; font-size: 18px;">.</span><span style="color: rgb(112, 61, 170); font-family: Menlo; font-size: 18px;">userInteractionEnabled</span><span style="font-family: Menlo; font-size: 18px;"> = </span><span style="font-family: Menlo; font-size: 18px; color: rgb(187, 44, 162);">YES</span><span style="font-family: Menlo; font-size: 18px;">;</span><div><span style="color: #000000"></span></div>    UIImageView* tempImageView = [[UIImageView alloc]initWithFrame:frame];    tempImageView.image = [UIImage imageNamed:@"1.jpg"];    [self.view addSubview:tempImageView];

    // 缩小    CGAffineTransform transform = CGAffineTransformMakeScale(0.1, 0.1);

    // 顺时针旋转，这里有位置变化，还没有想到在这个过程中旋转2周，现在是右转约半周    transform = CGAffineTransformRotate(transform, M_PI*1.99/2);

    // 设置目的地为右下角    CGPoint center = CGPointMake(self.view.bounds.size.width, self.view.bounds.size.height);    [UIView animateWithDuration:2 delay:0 usingSpringWithDamping:1 initialSpringVelocity:3 options:0 animations:^{        tempImageView.transform = transform;        tempImageView.center = center;    } completion:^(BOOL finished){        [tempImageView removeFromSuperview];    }];

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