CATransform3DMakeRotation似乎只是第二次正常工作

Question

我正在使用以下非常基本的代码，因为我正在尝试学习如何为初学者进行基本横向旋转的转换

我想做的远远不仅仅是投入'shouldautorotate'的东西，这就是我现在正在处理的代码

- (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

但是一旦我将它恢复为肖像并再次旋转，我就会接受

如果这是一个愚蠢的问题，或者我遗漏了一些明显的问题，我真的很抱歉。我在SO的帮助下一般都在学习：）

感谢您的帮助，请有一个好人。

Answer 1

如果您更改了Portrait上的中心或框架，则应将其更改回Landscape ... 你也应该在每次旋转时更改滚动视图的contentSize。

尝试这样的事情......

- (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) {

        }];
    }
}