如何改變像youTube應用程序按鈕點擊方向？

Question

如何更改像youTube應用程序的方向。

當我如果視圖是在肖像模式下它在橫向模式旋轉或者視圖是在橫向模式下它的旋轉爲縱向模式，當我改變方向也工作單擊此按鈕。

Answer 1

其實Youtube的界面並沒有真正旋轉，他們只是呈現視頻層全屏和旋轉圖層。

當您旋轉設備時，會發生同樣的想法，它們會使視頻圖層填滿屏幕並根據設備旋轉進行旋轉。 Facebook在全屏查看照片時旋轉設備並旋轉視圖時也是如此。

你可以開始通過詢問生成裝置符號定向通知監控旋轉：

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; 
[[NSNotificationCenter defaultCenter] 
    addObserver:self selector:@selector(orientationChanged:) 
    name:UIDeviceOrientationDidChangeNotification 
    object:[UIDevice currentDevice]]; 

然後在-(void)orientationChanged:方法更改UI：

- (void) orientationChanged:(NSNotification *)note 
{ 
    UIDevice * device = note.object; 

    CGAffineTransform transfrom; 
    CGRect frame = self.videoView.frame; 

    switch(device.orientation) 
    { 
     case UIDeviceOrientationPortrait: 
     case UIDeviceOrientationPortraitUpsideDown:  
      transfrom = CGAffineTransformIdentity; 
      frame.origin.y = 10.0f; 
      frame.origin.x = 10.0f; 
      frame.size.width = [UIScreen mainScreen] bounds].size.width; 
      frame.size.height = 240.0f; 

     break; 

     case UIDeviceOrientationLandscapeLeft: 
      transfrom = CGAffineTransformMakeRotation(degreesToRadians(90)); 
      frame.origin.y = 0.0f; 
      frame.origin.x = 0.0f; 
      frame.size.width =[UIScreen mainScreen] bounds].size.height; 
      frame.size.height =[UIScreen mainScreen] bounds].size.width; 
     break; 

     case UIDeviceOrientationLandscapeRight: 
      transfrom = CGAffineTransformMakeRotation(degreesToRadians(-90)); 
      frame.origin.y = 0.0f; 
      frame.origin.x = 0.0f; 
      frame.size.width =[UIScreen mainScreen] bounds].size.height; 
      frame.size.height =[UIScreen mainScreen] bounds].size.width; 
      break; 

     default: 
     return; 
     break; 
    }; 


    [UIView animateWithDuration:0.3f animations: ^{ 
     self.videoView.frame = frame; 
     self.videoView.transform = transfrom; 
    }]; 

} 

此代碼是未經測試寫入只是在這裏給你一個關於它如何可以做的概念。

Answer 2

試試這個 首次導入此： #import <objc/message.h>

比你的按鈕使用方法UIView的縱向和橫向的這

if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) 
{ 

    if (UIDeviceOrientationIsPortrait([UIDevice currentDevice].orientation)) 
    { 
     objc_msgSend([UIDevice currentDevice],@selector(setOrientation:),UIInterfaceOrientationLandscapeLeft); 
    }else 
    { 
     objc_msgSend([UIDevice currentDevice], @selector(setOrientation:), UIInterfaceOrientation); 

    } 

}