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iOS 6 下自动旋转的变化

 1 year ago
source link: https://fann.im/blog/2012/10/22/autorotation-changes-in-ios-6/
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iOS 6 下自动旋转的变化

Oct 22, 2012

iOS 6 SDK 中的屏幕自动旋转有了一些变化，简单纪录之。举例：Master-Detail 类型 App，master ViewController 不支持屏幕旋转， detail ViewController 支持屏幕旋转。

在 Info.plist 或 Target-Summary 启用自动旋转，选中需要的 Supported Interface Orientations。新建 UINavigationController+Autorotation.h category，根据需要禁用最底层 NavController 的自动旋转：

- (BOOL)shouldAutorotate
{
    return NO;
}

在 AppDelegate 设置 window.rootViewController = navController;，由于 shouldAutorotateToInterfaceOrientation: 从 iOS 6 起 deprecated，在需要自动旋转的 viewController 改用 supportedInterfaceOrientations+preferredInterfaceOrientationForPresentation。

- (BOOL)shouldAutorotate
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskAllButUpsideDown;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

几个需要注意的地方：

  1. window 需要设置 rootViewController，[window addSubview:navController.view]; 无效；
  2. shouldAutorotate 在最底层设置才有效；
  3. presentModalViewController 下用之前的自动旋转控制无效，须用 category 解决。

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