我的项目中个别的界面需要旋转屏幕，有的是不需要旋转的
解决如下：就是把系统类子类化，再使用子类
1.设置app级别的支持屏幕的方向
2.所有界面都有一个统一的BaseViewController,在这里实现ViewController级别的设置屏幕方向
3.在tabbarController中设置屏幕方向
4.在NavigationController中设置屏幕方向
5.在要旋转的页面设置屏幕旋转如下：
要旋转的view是通过这样展示
[self presentViewController:perview animated:NO completion:nil];
我这里应该是最笨的方法，屏幕旋转重新添加subviews,有待优化
在开发中遇到的需要注意的问题
1、UIAlertViewcontroller
iOS 8 UIActionSheet ignores view controller supportedInterfaceOrientations and shouldAutorotate
我做了一个·类扩展
```
-(void)viewWillAppear:(BOOL)animated
{
if([[UIDevicecurrentDevice]respondsToSelector:@selector(setOrientation:)]) {
[[UIDevicecurrentDevice]performSelector:@selector(setOrientation:)withObject:UIPrintInfoOrientationPortrait];
}
}
```
还看了一些stackoverflow中的问答
http://stackoverflow.com/questions/25819132/ios-8-uiactionsheet-ignores-view-controller-supportedinterfaceorientations-and-s
-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
UIViewController *presentedViewController = window.rootViewController.presentedViewController;
if (presentedViewController) {
if ([presentedViewController isKindOfClass:[UIActivityViewController class]] || [presentedViewController isKindOfClass:[UIAlertController class]]) {
return UIInterfaceOrientationMaskPortrait;
}
}
return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;（这是view controller级别的屏幕方向）
}
2、
deprecated表示已不被建议使用，可能随时取消它；建议采用新的来替代
3、相关链接：
http://blog.csdn.net/totogogo/article/details/8002173
#if 0
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations.
return YES;
}
#endif
#if 1
- (BOOL)shouldAutorotate
{
return YES;
}
- (NSUInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskAllButUpsideDown;
}
#endif
http://mobile.51cto.com/iphone-407786.htm
http://www.jianshu.com/p/73be6d0e152f
http://blog.csdn.net/yuanxiubin/article/details/8752990
BaseTabBarController BaseNavigationController
我都是先把系统类子类化 然后使用子类
我所有的页面都有一个统一的 BaseViewController 、
这里面实现了 #pragma mark 旋转
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationPortrait;
}
-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait;
}
-(BOOL)shouldAutorotate
{
return NO;
}
然后在要旋转的页面 加入下面代码
- (BOOL)shouldAutorotate
{
return NO;
}
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationLandscapeRight;
}
-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskLandscapeRight;
}