我的应用程序主要是纵向的,但是有一个视图需要横向.
My application is primarily portrait, however there is one view that REQUIRES a landscape orientation.
我的视图包含在 UINavigationController 中,这(显然)是导致此问题的原因.
My views are contained within a UINavigationController, which (apparently) is the cause of this issue.
除了一个之外的所有 UIViewControllers 都有这个:
All UIViewControllers except one have this:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
需要 Landscape 的 UIViewController 有这个:
The UIViewController that requires Landscape has this:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}
现在,当用户到达横向 UIViewController 时,它会以纵向显示.然后,用户可以旋转他们的手机,它会按照我的意愿横向显示(锁定为横向).然后用户继续使用纵向 UIViewController,同样的情况发生:它从横向开始,然后他们旋转手机,它再次变成纵向(并锁定为纵向).
Now, what happens is when the user reaches the landscape UIViewController, it is shown in portrait. The user can then rotate their phone and it displays in landscape as I want it to (locking to landscape). The user then progresses onwards to a portrait UIViewController and the same happens: it start in landscape, then they rotate their phone and it becomes portrait again (and locks to portrait).
UIViewController 之间似乎允许方向锁定,但是自动旋转/以编程方式更改方向被某种方式阻止了.
It seems orientation locking is allowed between UIViewControllers, however auto-rotation / programmatically changing the orientation is somehow blocked.
如何强制手机更新到正确的方向?
有一个临时解决方案:我可以检测设备的方向并显示一条消息,要求他们在不正确时旋转设备,但这不是最佳选择.
我的一个应用程序也有同样的要求!!!
I had the same requirement for one of my applications!!!
幸运的是我找到了解决方案!
luckily I found a solution!
为了保持主视图控制器的横向,无论从哪个方向弹出/推送,我都做了以下事情:(在 viewWillAppear 中:)
//set statusbar to the desired rotation position
[[UIApplication sharedApplication] setStatusBarOrientation:UIDeviceOrientationLandscapeLeft animated:NO];
//present/dismiss viewcontroller in order to activate rotating.
UIViewController *mVC = [[[UIViewController alloc] init] autorelease];
[self presentModalViewController:mVC animated:NO];
[self dismissModalViewControllerAnimated:NO];
P.S.在 sdk 3.2.5 ios 5.0.1 上测试.
P.S.Tested on sdk 3.2.5 ios 5.0.1.
附:在 iOS 8 上,先前的答案导致屏幕闪烁,而且 - 它不稳定(在某些情况下它不再适合我.)所以,为了我的需要,我将代码更改为:(ARC)
P.S. On iOS 8 previous answer results some screen flickering and also - it is not stable (In some cases It does not work for me anymore.) So, for my needs, I changed the code to: (ARC)
//set statusbar to the desired rotation position
[[UIApplication sharedApplication] setStatusBarOrientation:UIDeviceOrientationLandscapeLeft animated:NO];
[self.navigationController presentViewController:[UIViewController new] animated:NO completion:^{
dispatch_after(0, dispatch_get_main_queue(), ^{
[self.navigationController dismissViewControllerAnimated:NO completion:nil];
});
}];
//I added this code in viewDidDissapear on viewController class, which will be popped back.
希望它会有所帮助!
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