UIGetScreenImage（）在景觀？

Question

我使用以下代碼獲取屏幕截圖並將其保存到相冊中。

CGImageRef screen = UIGetScreenImage(); 
     UIImage *screenImage = [UIImage imageWithCGImage:screen]; 
    UIImageWriteToSavedPhotosAlbum(screenimage, nil, nil), nil); 

這很好用，但如果我的應用程序處於橫向模式，則保存的圖像不會正確顯示。 （需要90度轉彎）。我需要做什麼？

Answer 1

試驗要麼

[UIDevice currentDevice].orientation == UIInterfaceOrientationLandscapeRight 
[UIDevice currentDevice].orientation == UIInterfaceOrientationLandscapeLeft 
(and possibly more orientations) 

然後做相應的轉變到圖像。

這可以通過幾種方式來實現，這其中並不需要很多代碼：

/// click action saves orientation & picture: 
-(void)screenshot 
{ 
    self.orientationWhenPicked = [UIDevice currentDevice].orientation; 
    CGImageRef screen = UIGetScreenImage(); 
    self.image = [UIImage imageWithCGImage:screen]; 
    CGImageRelease(screen); 
} 

/// somewhere else we are called for the image 
-(UIImage*)getScreenshot 
{ 
    UIDeviceOrientation useOrientation = self.orientationWhenPicked; 
    UIImage *img = self.image; 

    UIGraphicsBeginImageContext(CGSizeMake(480.0f, 320.0f)); 
    CGContextRef context = UIGraphicsGetCurrentContext(); 
    if (useOrientation == UIDeviceOrientationLandscapeRight) 
    { 
      CGContextRotateCTM (context, M_PI/2.0f); 
      [img drawAtPoint:CGPointMake(0.0f, -480.0f)]; 
    } else { 
      CGContextRotateCTM (context, -M_PI/2.0f); 
      [img drawAtPoint:CGPointMake(-320.0f, 0.0f)]; 
    } 
    UIImage *ret = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    return ret; 
} 

我修改了一些張貼，使其自成一體之前，但它應該有一個工作一點努力（例如創建self.image等）。你可以將它們混合成一個函數。