Xcode 是否应自动旋转指针面方向不'；返回到肖像时不要开火

活动内容如下：

- (BOOL)shouldAutorotateToInterfaceOrientation (UIInterfaceOrientation)interfaceOrientation
{    
    [self setupScrollView];
    return YES;
}

每当旋转设备时，我都会设置我的

UIScrollView

，这样里面的东西总是“右”向上

---

除非设备从横向旋转回纵向（右侧向上），否则此操作有效，断点验证是否未调用

shouldAutorotateToInterfaceOrientation

。因此，当设备返回到纵向时，

UIScrollView

内容是横向的。如何解决此问题？

仍不确定上述操作为何无效，但以下操作似乎有效：

- (void)viewDidLoad {
[super viewDidLoad];  

//for some reason shouldAutorotateToInterfaceOrientation isn't firing when returning to portrait so we need to register for notifications
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(setupScrollView) name:UIDeviceOrientationDidChangeNotification object:nil];
}

- (void)viewDidLoad {
[super viewDidLoad];  

//for some reason shouldAutorotateToInterfaceOrientation isn't firing when returning to portrait so we need to register for notifications
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(setupScrollView) name:UIDeviceOrientationDidChangeNotification object:nil];
}