ios 获取UIView截图

#pragma mark 获取截屏图片
-(UIImage *)captureScreenForView:(UIView *)currentView {
    
    UIGraphicsBeginImageContextWithOptions(CGSizeMake(currentView.size.width, currentView.size.height), NO, 0.0);//原图
    [currentView.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return  viewImage;
}