當界面在Iphone中旋轉時，有沒有辦法調用一個函數？

Question

當我的界面旋轉時，我想調用某些功能。我怎樣才能做到這些？

Answer 1

取決於你想要做什麼，

實現some of these methods在活動視圖控制器類：

• -willRotateToInterfaceOrientation:duration:
• -willAnimateRotationToInterfaceOrientation:duration:
• -didRotateFromInterfaceOrientation:

或者some of these methods y中我們的應用程序委託：

• -application:willChangeStatusBarOrientation:duration:
• -application:didChangeStatusBarOrientation:

還是聽some of these local notifications：

• UIApplicationWillChangeStatusBarFrameNotification
• UIApplicationDidChangeStatusBarFrameNotification
• UIApplicationWillChangeStatusBarOrientationNotification
• UIApplicationDidChangeStatusBarOrientationNotification

Answer 2

您可以使用此：

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; 

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