Question

我有这个按钮，他在另一个ViewController（TimelineViewController）中调用一个函数（showActionSheetForPost）。

我的按钮：

weak var timeline: TimelineViewController?

     @IBAction func moreButtonTapped(sender: AnyObject) {
        timeline?.showActionSheetForPost(post!)
    }

另一个ViewController（TimelineViewController）：

class TimelineViewController: UIViewController, TimelineComponentTarget {

    @IBOutlet weak var tableView: UITableView!

// MARK: UIActionSheets

   func showActionSheetForPost(post: Post) {
        if (post.user == PFUser.currentUser()) {
            showDeleteActionSheetForPost(post)
        } else {
            showFlagActionSheetForPost(post)
        }
    }

    func showDeleteActionSheetForPost(post: Post) {
        let alertController = UIAlertController(title: nil, message: "Do you want to delete this post?", preferredStyle: .ActionSheet)

        let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
        alertController.addAction(cancelAction)

        let destroyAction = UIAlertAction(title: "Delete", style: .Destructive) { (action) in
            post.deleteInBackgroundWithBlock({ (success: Bool, error: NSError?) -> Void in
                if (success) {
                    self.timelineComponent.removeObject(post)
                } else {
                    // restore old state
                    self.timelineComponent.refresh(self)
                }
            })
        }
        alertController.addAction(destroyAction)

        self.presentViewController(alertController, animated: true, completion: nil)
    }

    func showFlagActionSheetForPost(post: Post) {
        let alertController = UIAlertController(title: nil, message: "Do you want to flag this post?", preferredStyle: .ActionSheet)

        let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
        alertController.addAction(cancelAction)

        let destroyAction = UIAlertAction(title: "Flag", style: .Destructive) { (action) in
            post.flagPost(PFUser.currentUser()!)
        }

        alertController.addAction(destroyAction)

        self.presentViewController(alertController, animated: true, completion: nil)
    }
}

我的问题：

当我触摸Button（moreButtonTapped）时，操作表不会出现。

非常感谢

Answer 1

您需要这样做：

TimelineViewController().showActionSheetForPost(post!)

或设置

weak var timeline: TimelineViewController()

Answer 2

@iamalizade

我截取了TimelineViewController中所有错误的屏幕截图

The errors

按钮不起作用

2 个答案: