IOS截图

- (UIImage *)captureScreenshot {

    UIGraphicsBeginImageContextWithOptions(self.bounds.size,NO,
[UIScreenmainScreen].scale);

    if ([selfrespondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)])
{

        [selfdrawViewHierarchyInRect:self.boundsafterScreenUpdates:NO];

    }

    else {

        [self.layerrenderInContext:UIGraphicsGetCurrentContext()];

    }

    UIImage *screenshot =UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return screenshot;

}