iOS 截图

//截屏

- (UIImage*)snapshot:(UIView*)eaglview{

    UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, 0.0);

    // Render our snapshot into the image context

    [eaglview drawViewHierarchyInRect:self.view.bounds afterScreenUpdates:NO];

    // Grab the image from the context

    UIImage *complexViewImage = UIGraphicsGetImageFromCurrentImageContext();

    // Finish using the context

    UIGraphicsEndImageContext();

    return complexViewImage;

}