IOS橫豎屏

1.橫豎屏設定

1.1XCode選擇設定(整個app有效)

選擇Project->Target->General->Deployment Info->Device Orientation，勾選須要支持的屏幕方向，好比 :fa-square-o:Portrait :fa-square-o:Upside Down :fa-square-o:Landscape Left :fa-square-o:Landscape Right

1.2.AppDelegate.m文件中代碼設定(整個app有效)

在AppDelegate.m中添加方法：

//IOS6及以上
  - (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window  NS_AVAILABLE_IOS(6_0){
    return UIInterfaceOrientationMaskPortrait;
}

1.3.單個View橫豎屏設定(單個View有效)

主要依賴於如下幾個函數

//當前viewcontroller是否支持轉屏
- (BOOL)shouldAutorotate NS_AVAILABLE_IOS(6_0);

//當前viewcontroller支持哪些轉屏方向
- (UIInterfaceOrientationMask)supportedInterfaceOrientations NS_AVAILABLE_IOS(6_0);

//當前viewcontroller默認的屏幕方向
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation NS_AVAILABLE_IOS(6_0);

2.相關(ENUM)UIInterfaceOrientation說明

UIInterfaceOrientationMask －>UIInterfaceOrientation的多種組合

UIInterfaceOrientationMaskPortrait  //豎屏
UIInterfaceOrientationMaskLandscapeLeft  //左橫屏
UIInterfaceOrientationMaskLandscapeRight  //右橫屏
UIInterfaceOrientationMaskPortraitUpsideDown  //豎屏（顛倒）
UIInterfaceOrientationMaskLandscape  //橫屏
UIInterfaceOrientationMaskAll  //全部狀態
UIInterfaceOrientationMaskAllButUpsideDown  //除顛倒豎屏外

3.轉屏時觸發哪些函數

<1>調用於翻轉以前

//通常用來禁用某些控件或者中止某些正在進行的活動，好比中止視頻播放。

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration NS_DEPRECATED_IOS(2_0,8_0);

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id <UIViewControllerTransitionCoordinator>)coordinator NS_AVAILABLE_IOS(8_0);

<2>調用於翻轉的過程當中

//通常用來定製翻轉後各個控件的位置、大小等。

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration NS_DEPRECATED_IOS(3_0,8_0);

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id <UIViewControllerTransitionCoordinator>)coordinator NS_AVAILABLE_IOS(8_0);

<3>調用於整個翻轉完成以後。

//通常用來從新啓用某些控件或者繼續翻轉以前被暫停的活動，好比繼續視頻播放

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation NS_DEPRECATED_IOS(2_0,8_0);

4.判斷當前屏幕狀態（橫／豎）

1. UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
2. UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;