iOS截屏

-(void)fullScreenshots{

UIWindow *screenWindow = [[UIApplication sharedApplication] keyWindow];

    UIGraphicsBeginImageContext(screenWindow.frame.size);//全屏截圖，包括window

    [screenWindow.layer renderInContext:UIGraphicsGetCurrentContext()];

    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

}

objective c 截屏代碼

-(void)save{

UIGraphicsBeginImageContext(mybackgroundview.bounds.size); //currentView 當前的view

[mybackgroundview.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);  //保存到相冊中

}截取 您想要的一層

UIGraphicsBeginImageContext(CGSizeMake(320, 300)); //currentView 當前的view

[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);  //保存到相冊中

截取自定義的大小

iPhone開發應用中抓圖程序案例實現是本文要介紹的內容，主要是通過代碼來實現抓圖程序，具體實現過程，一起來看詳細代碼。

1. //獲得屏幕圖像  
2. - (UIImage *)imageFromView: (UIView *) theView    
3. {  
4.       
5.     UIGraphicsBeginImageContext(theView.frame.size);  
6.     CGContextRef context = UIGraphicsGetCurrentContext();  
7.     [theView.layer renderInContext:context];  
8.     UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();  
9.     UIGraphicsEndImageContext();  
10.       
11.     return theImage;  
12. }  
13.  
14. //獲得某個範圍內的屏幕圖像  
15. - (UIImage *)imageFromView: (UIView *) theView   atFrame:(CGRect)r  
16. {  
17.     UIGraphicsBeginImageContext(theView.frame.size);  
18.     CGContextRef context = UIGraphicsGetCurrentContext();  
19.     CGContextSaveGState(context);  
20.     UIRectClip(r);  
21.     [theView.layer renderInContext:context];  
22.     UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();  
23.     UIGraphicsEndImageContext();  
24.       
25.     return  theImage;//[self getImageAreaFromImage:theImage atFrame:r];  
26. }