ios(ipad,iphone)屏幕旋转检测通用方法

在特别的场景下，需要针对屏幕旋转作特殊处理。在ios系统下实现相关的功能还是比较方便的。

我下面介绍两种方法：

1.注册UIApplicationDidChangeStatusBarOrientationNotification通知（举例:在一个viewcontroller类的viewdidload中注册该通知），示例代码如下：

        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(statusBarOrientationChange:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];

- (void)statusBarOrientationChange:(NSNotification *)notification

{

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

    if (orientation == UIInterfaceOrientationLandscapeRight) // home键靠右

    {

        //

    }

    if (

        orientation ==UIInterfaceOrientationLandscapeLeft) // home键靠左

    {

        //

    }

    if (orientation == UIInterfaceOrientationPortrait)

    {

        //

    }

    if (orientation == UIInterfaceOrientationPortraitUpsideDown)

    {

        //

    }

}

当我们关注的东西和布局相关而不是纯粹设备旋转，我们使用上面的代码作为实现方案比较适合。

2.注册UIDeviceOrientationDidChangeNotification通知（举例:我们同样在一个viewcontroller类的viewdidload中注册该通知），示例代码如下：

  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientChange:) name:UIDeviceOrientationDidChangeNotification object:nil];

- (void)orientChange:(NSNotification *)noti

{

    NSDictionary* ntfDict = [noti userInfo];

    UIDeviceOrientation  orient = [UIDevice currentDevice].orientation;

    /*

     UIDeviceOrientationUnknown,

     UIDeviceOrientationPortrait,            // Device oriented vertically, home button on the bottom

     UIDeviceOrientationPortraitUpsideDown,  // Device oriented vertically, home button on the top

     UIDeviceOrientationLandscapeLeft,       // Device oriented horizontally, home button on the right

     UIDeviceOrientationLandscapeRight,      // Device oriented horizontally, home button on the left

     UIDeviceOrientationFaceUp,              // Device oriented flat, face up

     UIDeviceOrientationFaceDown             // Device oriented flat, face down   */

           switch (orient)

        {

            case UIDeviceOrientationPortrait:

                break;

            case UIDeviceOrientationLandscapeLeft:

                break;

            case UIDeviceOrientationPortraitUpsideDown:

                break;

            case UIDeviceOrientationLandscapeRight:

                break;

            default:

                break;

        }

}

ios(ipad,iphone)屏幕旋转检测通用方法