iOS 高清截取控件原图

#pragma mark 参数view即我们要截取的控件以及控件上的所有视图
- (UIImage *)imageFromView:(UIView *)view withFrame:(CGRect)theFrame
{
UIImage* image = nil;//最终返回的image

//设置截取尺寸
CGSize size = CGSizeMake(theFrame.size.width, theFrame.size.height);

//高清处理
UIGraphicsBeginImageContextWithOptions(size, YES, [UIScreen mainScreen].scale);
[view.layer renderInContext: UIGraphicsGetCurrentContext()];

//得到图片
image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return  image;
}

UIImage * img = [self imageFromView:self.view withFrame:CGRectMake(0, 0, self.view.width, self.view.height)];