Develop app code for iPhone to implement screenshot Function

IPhone DevelopmentThe screenshot function of application code is described in this article. The content is mainly explained by code. Let's look at code implementation first.

IPhoneYou can press the Home and lock screen keys at the same time.ScreenshotsBut in the application, you cannot jump out of a line to let the user cutScreenKey. The Code shared by the CocoaChina member "bobgreen" can implement the screenshot function in the program and support the iPhone 4 Retina high-split screen.

 
 

  
  
UIView * view = [[[[UIApplication sharedApplication] windows] objectAtIndex: 1] subviews] lastObject]; // obtain a subView of a window
  
  

  
  
NSInteger index = 0; // used to name the saved png
  
  
For (UIView * subView in [view subviews]) {// traverses the subViews of this view
  
  
If ([subView isKindOfClass: NSClassFromString (@ "UIImageView")] | [subView isKindOfClass: NSClassFromString (@ "UIThreePartButton")])
  
  
{// Find the desired subView
  
  
// The key to supporting high retina scores
  
  
If (uigraphicsbeginimagecontextwitexceptions! = NULL)
  
  
{
  
  
Uigraphicsbeginimagecontextwittions (subView. frame. size, NO, 0.0 );
  
  
} Else {
  
  
UIGraphicsBeginImageContext (subView. frame. size );
  
  
}
  
  

  
  
// Obtain the image
  
  
[SubView. layer renderInContext: UIGraphicsGetCurrentContext ()];
  
  
UIImage * image = UIGraphicsGetImageFromCurrentImageContext ();
  
  
UIGraphicsEndImageContext ();
  
  

  
  
// Save the image
  
  
NSString * path = [NSHomeDirectory () stringByAppendingFormat: @ "/mongod.png", index];
  
  
If ([UIImagePNGRepresentation (image) writeToFile: path atomically: YES]) {
  
  
Index + = 1;
  
  
NSLog (@ "Succeeded! ");
  
  
}
  
  
Else {
  
  
NSLog (@ "Failed! ");
  
  
}
  
  
}
  
  
}
 
 

Summary:IPhone DevelopmentApplication code implementationScreenshotsI hope this article will be helpful to you.