iOS6的旋屏控制技巧
在iOS5.1 和 之前的版本中, 我們通常利用 shouldAutorotateToInterfaceOrientation: 來單獨(dú)控制某個(gè)UIViewController的旋屏方向支持,比如:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
但是在iOS6中,這個(gè)方法被廢棄了,使用無效。
shouldAutorotateToInterfaceOrientation:
Returns a Boolean value indicating whether the view controller supports the specified orientation. (Deprecated in iOS 6.0. Override the supportedInterfaceOrientations andpreferredInterfaceOrientationForPresentation methods instead.)
實(shí)踐后會(huì)發(fā)現(xiàn),通過supportedInterfaceOrientations的單獨(dú)控制是無法鎖定屏幕的。
-(NSUInteger)supportedInterfaceOrientations
{ return UIInterfaceOrientationMaskPortrait;
}
多次實(shí)驗(yàn)后總結(jié)出控制屏幕旋轉(zhuǎn)支持方向的方法如下:
子類化UINavigationController,增加方法
- (BOOL)shouldAutorotate
{
return self.topViewController.shouldAutorotate;
}
- (NSUInteger)supportedInterfaceOrientations
{
return self.topViewController.supportedInterfaceOrientations;
}
并且設(shè)定其為程序入口,或指定為 self.window.rootViewController
隨后添加自己的view controller,如果想禁止某個(gè)view controller的旋屏:(支持全部版本的控制)
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
-(BOOL)shouldAutorotate
{
return NO;
}
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait;
}
如果想又開啟某個(gè)view controller的全部方向旋屏支持:
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
-(NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskAllButUpsideDown;
}
-(BOOL)shouldAutorotate
{
return YES;
}
從而實(shí)現(xiàn)了對(duì)每個(gè)view controller的單獨(dú)控制。
順便提一下,如果整個(gè)應(yīng)用所有view controller都不支持旋屏,那么干脆:
- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
return UIInterfaceOrientationMaskPortrait;
}
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