iOS 屏幕旋转控制

来源：互联网发布：淘宝上的服装利润多少编辑：程序博客网时间：2024/05/16 07:39

今天主要给大家讲一下在iOS开发中怎样控制屏幕的旋转。

在iOS6之前的版本中，我们经常用 shouldAutorotateToInterfaceOrientation: 方法来控制一个UIViewController的旋转方向支持，如：

<span style="font-size:18px;">- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{    return (interfaceOrientation == UIInterfaceOrientationPortrait);}</span>

但是在iOS6.0中这个方法被废弃了。

<span style="font-size:18px;">// Applications should use supportedInterfaceOrientations and/or shouldAutorotate..- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation NS_DEPRECATED_IOS(2_0, 6_0) __TVOS_PROHIBITED;</span>

新的控制方式是通过两个方法一起来控制的

<span style="font-size:18px;">// New Autorotation support.- (BOOL)shouldAutorotate NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;- (UIInterfaceOrientationMask)supportedInterfaceOrientations NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;// Returns interface orientation masks.- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;</span>

通过实践得出结论，如果window的根视图是一个UINavigationController对象，对屏幕旋转方向的控制方法如下：

<span style="font-size:18px;">- (BOOL)shouldAutorotate  {      return self.topViewController.shouldAutorotate;  }    - (NSUInteger)supportedInterfaceOrientations  {      return self.topViewController.supportedInterfaceOrientations;  }  </span>

然后在添加的UIViewController中添加一下代码控制屏幕的旋转（支持所有版本）

<span style="font-size:18px;">- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  {      return (interfaceOrientation == UIInterfaceOrientationPortrait);  } - (BOOL)shouldAutorotate{    return NO;}- (NSUInteger)supportedInterfaceOrientations{     return UIInterfaceOrientationMaskPortrait;}</span>

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<span style="font-size:18px;">开启全部方向支持 </span>

<span style="font-size:18px;">- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  {      return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);  }    -(NSUInteger)supportedInterfaceOrientations  {      return UIInterfaceOrientationMaskAllButUpsideDown;  }    -(BOOL)shouldAutorotate  {      return YES;  }  </span>

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