ios开发日记- 5 屏幕截图

-(void)fullScreenshots{

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

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

[screenWindow.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

}

objective c 截屏代码

-(void)save{

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

[mybackgroundview.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil); //保存到相册中

}截取 您想要的一层

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

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

UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil); //保存到相册中

截取自定义的大小

iPhone开发应用中抓图程序案例实现是本文要介绍的内容，主要是通过代码来实现抓图程序，具体实现过程，一起来看详细代码。

//获得屏幕图像

- (UIImage *)imageFromView: (UIView *) theView

{

UIGraphicsBeginImageContext(theView.frame.size);

CGContextRef context = UIGraphicsGetCurrentContext();

[theView.layer renderInContext:context];

UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return theImage;

}

//获得某个范围内的屏幕图像

- (UIImage *)imageFromView: (UIView *) theView atFrame:(CGRect)r

{

UIGraphicsBeginImageContext(theView.frame.size);

CGContextRef context = UIGraphicsGetCurrentContext();

CGContextSaveGState(context);

UIRectClip(r);

[theView.layer renderInContext:context];

UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return theImage;//[self getImageAreaFromImage:theImage atFrame:r];

}