1 配置

//appDelegate，默認(rèn)是plist里面UIInterfaceOrientation決定（Build Settings->General設(shè)置）。
-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
      //優(yōu)先級(jí)高于info.plist
}

系統(tǒng)沒有關(guān)閉自動(dòng)旋轉(zhuǎn)時(shí)

//UIViewController.m
#pragma mark - rotation
//定義是否支持自動(dòng)旋轉(zhuǎn)
-(BOOL)shouldAutorotate {
    return YES;
}
//定義支持旋轉(zhuǎn)的方向
-(UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return isPad ? UIInterfaceOrientationMaskLandscape : UIInterfaceOrientationMaskPortrait;
}
//定義第一次進(jìn)來的時(shí)候的方向
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return isPad ? UIInterfaceOrientationLandscapeLeft : UIInterfaceOrientationPortrait;
}

2 生命周期

//controller
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator{
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
    if (size.width > size.height) {
        //橫屏設(shè)置，為防止遮擋鍵盤,調(diào)整輸入視圖的高度
        self.textView_height.constant = 50;
    }else{
        //豎屏設(shè)置
        self.textView_height.constant = 200;
    }
}

//子視圖
- (void)layoutSubviews {
    [super layoutSubviews];

    if ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationMaskPortrait) {
        //豎屏布局
    } else {
        //橫屏布局
    }
}

3 設(shè)備方向&屏顯方向

UIDeviceOrientation
機(jī)器硬件方向，只讀，可以通過KVC設(shè)置
    [UIDevice currentDevice].orientation
UIInterfaceOrientation
程序界面方向，屬性只讀，有set方法可寫。
    [UIApplication sharedApplication].statusBarOrientation

注意

1. 注意彈框View與旋屏
2. 橫豎屏分辨率數(shù)

//iOS 8之后
//    豎屏：  
    UIScreen.mainScreen().bounds: (0.0,0.0,320.0,568.0)  
//    橫屏：  
    UIScreen.mainScreen().bounds: (0.0,0.0,568.0,320.0) 

iOS橫豎屏旋轉(zhuǎn)及其基本適配方法