判断ios设备旋转方向

---

title: 判断ios设备旋转方向
date: 2016-03-8 22:12:57

tags: ios

• 首先你要在对应的controller中，开启旋转的功能

  // 默认开启全部方向的旋转
  - (BOOL)shouldAutorotate {
      return YES;
  }

• 下一个方法是可以旋转接受哪几个方向的旋转

  - (UIInterfaceOrientationMask)supportedInterfaceOrientations {
        return UIInterfaceOrientationMaskPortrait |UIInterfaceOrientationMaskLandscapeLeft;
    }

  // 可以选择多个方向选择
  typedef NS_OPTIONS(NSUInteger, UIInterfaceOrientationMask) {
      UIInterfaceOrientationMaskPortrait = (1 << UIInterfaceOrientationPortrait),
      UIInterfaceOrientationMaskLandscapeLeft = (1 << UIInterfaceOrientationLandscapeLeft),
      UIInterfaceOrientationMaskLandscapeRight = (1 << UIInterfaceOrientationLandscapeRight),
      UIInterfaceOrientationMaskPortraitUpsideDown = (1 << UIInterfaceOrientationPortraitUpsideDown),
      UIInterfaceOrientationMaskLandscape = (UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight),
      UIInterfaceOrientationMaskAll = (UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskPortraitUpsideDown),
      UIInterfaceOrientationMaskAllButUpsideDown = (UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight),
  } __TVOS_PROHIBITED;

• 旋转的时候，你可以开启系统通知的功能，这样你就可以在旋转的时候执行特定的函数了

  [[NSNotificationCenter defaultCenter] addObserver:self
                      selector:@selector(statusBarOrientationChange:)                                                               name:UIApplicationDidChangeStatusBarOrientationNotification
                                               object:nil];
  
   // 打印出相关的方向
   - (void)statusBarOrientationChange:(NSNotification *)notification {
  
      UIInterfaceOrientation oriention = [UIApplication sharedApplication].statusBarOrientation;
      NSLog(@"%ld",(long)oriention);
  }