Iphone CATTransferM3dMakeRotation似乎只在第二次正常工作

我正在使用以下相当基本的代码，因为我正在尝试学习如何为初学者使用基本的横向旋转进行转换

我想用很长的一段时间来学习更多的东西，而不仅仅是“应该自动旋转”的东西，这就是我现在正在编写的代码

- (void)viewDidLoad
{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didRotate:) name:UIDeviceOrientationDidChangeNotification object:nil];
}


- (void)didRotate:(NSNotification *)notification
{
    UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]; 
    if (orientation == UIDeviceOrientationLandscapeRight)
    { 
        [UIView animateWithDuration:0.2f animations:^{
            self.view.layer.transform = CATransform3DMakeRotation(-M_PI/2, 0, 0.0, 1.0); 
            [self.scrollViewImages setContentSize:CGSizeMake(self.view.frame.size.width*self.images.count, 320.0)];
            [self.scrollViewImages setContentOffset:CGPointMake(0, 0) animated:YES];
        } completion:^(BOOL finished) {

        }];
    } else if(orientation == UIDeviceOrientationPortrait) {
        [UIView animateWithDuration:0.2f animations:^{ 
            self.view.frame = CGRectMake(0, 0, 320.0, 480.0);
            self.view.center = CGPointMake(160.0, 240.0);
            self.view.transform = CGAffineTransformIdentity;            
        } completion:^(BOOL finished) {

        }];
    }
}

然而，当我第一次从肖像旋转时，我得到了这个

但一旦我把它恢复到纵向并再次旋转，我就收到了

如果这是一个愚蠢的问题，或者我遗漏了一些明显的东西，我真的很抱歉。我通常在SO的帮助下自学：）

---

感谢您的帮助，祝您好运。

如果您更改了肖像上的中心或边框，您应该将其更改回“风景”中。。。 此外，每次旋转滚动视图时，都应更改其内容大小

试试这样的

- (void)didRotate:(NSNotification *)notification
{
    UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]; 
    if (orientation == UIDeviceOrientationLandscapeRight)
    { 
        [UIView animateWithDuration:0.2f animations:^{
            self.view.frame = CGRectMake(0, 0, 480.0, 320.0);
            self.view.center = CGPointMake(240.0, 160.0);

            self.view.layer.transform = CATransform3DMakeRotation(-M_PI/2, 0, 0.0, 1.0); 
            [self.scrollViewImages setContentSize:CGSizeMake(self.view.frame.size.width*self.images.count, 320.0)];
            [self.scrollViewImages setContentOffset:CGPointMake(0, 0) animated:YES];
        } completion:^(BOOL finished) {

        }];
    } else if(orientation == UIDeviceOrientationPortrait) {
        [UIView animateWithDuration:0.2f animations:^{ 
            self.view.frame = CGRectMake(0, 0, 320.0, 480.0);
            self.view.center = CGPointMake(160.0, 240.0);
            self.view.transform = CGAffineTransformIdentity;            

            [self.scrollViewImages setContentSize:CGSizeMake(self.view.frame.size.width*self.images.count, 320.0)];
            [self.scrollViewImages setContentOffset:CGPointMake(0, 0) animated:YES];

        } completion:^(BOOL finished) {

        }];
    }
}