类似于在ios7中打开应用的动画

@property (weak, nonatomic) IBOutlet UIImageView *bg;
@property (weak, nonatomic) IBOutlet UIImageView *cal;
…

bool nowZoomed = NO;
CGRect iconPosition = {16,113,60,60}; // customize icon position

- (CGRect)zoomedRect // just a helper function, to get the new background screen size
{
    float screenWidth = UIScreen.mainScreen.bounds.size.width;
    float screenHeight = UIScreen.mainScreen.bounds.size.height;

    float size = screenWidth / iconPosition.size.width;
    float x = screenWidth/2 - (CGRectGetMidX(iconPosition) * size);
    float y = screenHeight/2 - (CGRectGetMidY(iconPosition) * size);

    return CGRectMake(x, y, screenWidth * size, screenHeight * size);
}

- (IBAction)test
{
    float animationDuration = 0.3f; //default
    if (nowZoomed) // zoom OUT
    {
        [UIView animateWithDuration:animationDuration animations:^{ // animate to original frame
            _cal.frame = iconPosition;
            _bg.frame = UIScreen.mainScreen.bounds;
        } completion:^(BOOL finished) {
            [UIView animateWithDuration:animationDuration/2.0f animations:^{ // then fade out
                _cal.alpha = 0.0f;
            } completion:^(BOOL finished) {
                _cal.hidden = YES;
            }];
        }];
    }
    else // zoom IN
    {
        _cal.alpha = 0.0f;
        _cal.hidden = NO;
        [UIView animateWithDuration:animationDuration/2.0f animations:^{ // fade in faster
            _cal.alpha = 1.0f;
        }];
        [UIView animateWithDuration:animationDuration animations:^{ // while expanding view
            _cal.frame = UIScreen.mainScreen.bounds;
            _bg.frame = [self zoomedRect];
        }];
    }
    nowZoomed = !nowZoomed;
}

您可以通过创建一个示例项目来对其进行测试：

• 像我一样从模拟器制作两个屏幕截图（主屏幕和日历视图），或抓取以下两个屏幕：主屏幕/日历
• 在情节提要中添加2个图像视图和1个按钮
• 使背景图像视图与整个屏幕一样大
• 另一个具有此尺寸的图像视图： {16,113,60,60}
• IBOutlet为两者创建一个（前两行代码）
• 将按钮动作目标设置为 -(void)test

故事板图片（左）和动画过渡（右）