iOS

其中有一个必须的参数，类型是 UIView * ,这个参数表示您要截取的那部分视图。有两个方法，一个是截取该视图的整个部分，还要一个方法是截取该视图的某一部分，方法如下:

//获得某个范围内的屏幕图像

- (UIImage *)captureScreenForView:(UIView *)currentView andFrame:(CGRect)rect

{

    UIGraphicsBeginImageContext(currentView.frame.size);

    CGContextRef context =UIGraphicsGetCurrentContext();

    CGContextSaveGState(context);

    UIRectClip(rect);

    [currentView.layerrenderInContext:context];

    UIImage *theImage =UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    

    return  theImage;

}

// 截取全屏

-(UIImage *)captureScreenForView:(UIView *)currentView {

    UIGraphicsBeginImageContext(currentView.frame.size);

    [currentView.layerrenderInContext:UIGraphicsGetCurrentContext()];

    UIImage *viewImage =UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    

    return  viewImage;

}