UINavigationController强制旋转 [英] UINavigationController Force Rotate

问题描述

我的应用程序主要是人像，但是有一个视图需要横向方向。

My application is primarily portrait, however there is one view that REQUIRES a landscape orientation.

我的视图包含在UINavigationController中，显然这是原因这个问题。

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：

All UIViewControllers except one have this:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

需要Landscape的UIViewController具有：

The UIViewController that requires Landscape has this:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}

现在，当用户到达格局UIViewController时会发生什么在肖像。然后，用户可以旋转他们的手机，并按照我想要的方式显示在风景中（锁定到横向）。然后用户继续前进到肖像UIViewController，同样的事情发生：它从横向开始，然后他们旋转手机，它再次成为肖像（并锁定到肖像）。

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).

似乎UIViewControllers之间允许方向锁定，但是自动旋转/以编程方式更改方向会以某种方式被阻止。

It seems orientation locking is allowed between UIViewControllers, however auto-rotation / programmatically changing the orientation is somehow blocked.

如何强制手机更新为正确的方向？

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，要求他们旋转设备如果它不正确，但这不是最佳的。

推荐答案

我对我的一个要求相同申请!!!

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格局，无论从哪个方向弹出/推动，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];

在sdk上安装3.2.5 ios 5.0.1。

P.S.Tested on sdk 3.2.5 ios 5.0.1.

PS在iOS 8之前的回答导致一些屏幕闪烁，而且 - 它不稳定（在某些情况下它不再适用于我。）因此，根据我的需要，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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