iOS6的旋屏控制技巧app
在iOS5.1 和 以前的版本中, 咱們一般利用 shouldAutorotateToInterfaceOrientation: 來單獨控制某個UIViewController的旋屏方向支持,好比:ide
- - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
- {
- return (interfaceOrientation == UIInterfaceOrientationPortrait);
- }
可是在iOS6中,這個方法被廢棄了,使用無效。spa
shouldAutorotateToInterfaceOrientation:.net
Returns a Boolean value indicating whether the view controller supports the specified orientation. (Deprecated in iOS 6.0. Override the supportedInterfaceOrientations andpreferredInterfaceOrientationForPresentation methods instead.)blog
實踐後會發現,經過supportedInterfaceOrientations的單獨控制是沒法鎖定屏幕的。內存
- -(NSUInteger)supportedInterfaceOrientations
- {
- return UIInterfaceOrientationMaskPortrait;
- }
屢次實驗後總結出控制屏幕旋轉支持方向的方法以下:ci
子類化UINavigationController,增長方法it
- - (BOOL)shouldAutorotate
- {
- return self.topViewController.shouldAutorotate;
- }
-
- - (NSUInteger)supportedInterfaceOrientations
- {
- return self.topViewController.supportedInterfaceOrientations;
- }
而且設定其爲程序入口,或指定爲 self.window.rootViewControllerio
隨後添加本身的view controller,若是想禁止某個view controller的旋屏:(支持所有版本的控制)class
- - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
- {
- return (interfaceOrientation == UIInterfaceOrientationPortrait);
- }
-
- -(BOOL)shouldAutorotate
- {
- return NO;
- }
-
- -(NSUInteger)supportedInterfaceOrientations
- {
- return UIInterfaceOrientationMaskPortrait;
- }
若是想又開啓某個view controller的所有方向旋屏支持:
- - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
- {
- return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
- }
-
- -(NSUInteger)supportedInterfaceOrientations
- {
- return UIInterfaceOrientationMaskAllButUpsideDown;
- }
-
- -(BOOL)shouldAutorotate
- {
- return YES;
- }
從而實現了對每一個view controller的單獨控制。
順便提一下,若是整個應用全部view controller都不支持旋屏,那麼幹脆:
- - (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
- {
- return UIInterfaceOrientationMaskPortrait;
- }
下次再說說iOS6的內存控制吧
來源:http://blog.csdn.net/yiyaaixuexi/article/details/8035014