IOS瘋狂基礎之屏幕旋轉控制，得到當前方向（轉）

轉自：http://blog.csdn.net/wudizhukk/article/details/8674393

得到當前屏幕方向

 

self.interfaceOrientation或[[UIApplication sharedApplication] statusBarOrientation]

 if (self.interfaceOrientation==UIDeviceOrientationLandscapeRight) {

XXOO

}

不旋轉，保持豎屏

//iOS 5-(BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
        return(toInterfaceOrientation ==UIInterfaceOrientationPortrait);}//iOS 6-(BOOL)shouldAutorotate
{
        return NO;}-(NSUInteger)supportedInterfaceOrientations
{
        returnUIInterfaceOrientationMaskPortrait;}-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
        returnUIInterfaceOrientationPortrait;}

始終保持橫屏

//iOS 5-(BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
        return(toInterfaceOrientation ==self.preferredInterfaceOrientationForPresentation);}//iOS 6-(BOOL) shouldAutorotate
{
        return YES;}-(NSUInteger)supportedInterfaceOrientations
{
        returnUIInterfaceOrientationMaskLandscapeRight;}-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
        returnUIInterfaceOrientationLandscapeRight;}

在使用UINavigationController時發現，不管怎麼設置上面方法的返回，都沒法控制UINavigationController的旋轉，這彷佛是iOS的一個bug。但不管如何，如下是stackflow上面的一個解決方法：

 1 @implementation UINavigationController (Rotation_IOS6)
 2 -(BOOL)shouldAutorotate {
 3     return [[self.viewControllers lastObject] shouldAutorotate];
 4 }
 5 
 6 -(NSUInteger)supportedInterfaceOrientations {
 7     return [[self.viewControllers lastObject] supportedInterfaceOrientations];
 8 }
 9 
10 - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
11     return [[self.viewControllers lastObject] preferredInterfaceOrientationForPresentation];
12 }
13 @end

 

 

屏幕旋轉方法調用流程

 

 

要翻轉的時候，首先響應的方法：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

return YES則支持翻轉，NO則不支持。

緊接着

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration

被調用。這個方法是發生在翻轉開始以前。通常用來禁用某些控件或者中止某些正在進行的活動，好比中止視頻播放。
再來是

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration

這個方法發生在翻轉的過程當中，通常用來定製翻轉後各個控件的位置、大小等。能夠用另外兩個方法來代替：willAnimateFirstHalfOfRotationToInterfaceOrientation:duration:   和  willAnimateSecondHalfOfRotationFromInterfaceOrientation:duration:

最後調用的是

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation這個方法發生在整個翻轉完成以後。通常用來從新啓用某些控件或者繼續翻轉以前被暫停的活動，好比繼續視頻播放