UIViewをUIImageに変換

// UIViewをUIImageに変換する(objective-c)
- (UIImage*)convertUIimageFromUIview:(UIView*)view {
    
    UIGraphicsBeginImageContext(view.frame.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return image;
}

// UIViewをUIImageに変換する(Swift)
func convertUIimageFromUIview(view: UIView) -> UIImage {
        
    UIGraphicsBeginImageContext(view.frame.size)
    view.layer .renderInContext(UIGraphicsGetCurrentContext())
    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
        
    return image
}