itemForActivityType未被调用

Question

我刚刚为共享助手创建了一个包装类，我的代码如下。

let activityVC = UIActivityViewController(activityItems: [message], applicationActivities: nil)

 activityVC.setValue(subject, forKey: "subject")
activityVC.completionWithItemsHandler = {(activityType: String!, completed:Bool, objects:[AnyObject]!, error:NSError!) in
}
fromVC.presentViewController(activityVC, animated: true, completion: nil)

问题从这里开始，UIActivityItemSource方法没有被调用

override func activityViewController(activityViewController: UIActivityViewController, itemForActivityType activityType: String) -> AnyObject? {
            switch activityType
            {
            case UIActivityTypeMail:
                return msg
            case UIActivityTypeMessage:
                return msg
            case UIActivityTypePostToFacebook:
                return msg
            case UIActivityTypePostToTwitter:
                return strTwitterShare
            default:
                return msg
            }

        }

感谢您的帮助

Answer 1

如果你使用let activityVC = UIActivityViewController（activityItems：[self]，applicationActivities：nil）

...然后在itemForActivityType方法中提供您的消息。