這篇文章主要介紹了在ios啟動頁強制豎屏，進入App后允許橫屏與豎屏的相關資料，需要的朋友可以參考下。

方法如下

1、修改App-info.plist(在XCode中General中設置 一樣的效果)

 <key>UISupportedInterfaceOrientations</key> <array>  <string>UIInterfaceOrientationPortrait</string> </array>

2、AppDelegate中：

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window { return UIInterfaceOrientationMaskAllButUpsideDown;}

貼一下蘋果對這個的解釋，可以放心使用：

Discussion

This method returns the total set of interface orientations supported by the app. When determining whether to rotate a particular view controller, the orientations returned by this method are intersected with the orientations supported by the root view controller or topmost presented view controller. The app and view controller must agree before the rotation is allowed.

If you do not implement this method, the app uses the values in the UIInterfaceOrientation key of the app's Info.plist as the default interface orientations.

總結

以上就是這篇文章的全部內容了，希望本文的內容對各位iOS開發者們能帶來一定的幫助，如果有疑問大家可以留言交流，謝謝大家對VEVB武林網的支持。