Segue正在执行两次 [英] Segue is being executed twice

问题描述

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
   self.selectedClubState = stateNamesForDisplay[indexPath.row]
   self.performSegueWithIdentifier ("Cities", sender: self)
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    var clubsToPassToCitiesViewController = [clubObject]()
    if segue.identifier == "Cities" {
        for club in clubsForTable{
            if club.clubState == self.selectedClubState{
                clubsToPassToCitiesViewController.append(club)
            }
        }
       let citiesView = segue.destinationViewController as? citiesViewController
       citiesView?.clubsForChosenCity = clubsToPassToCitiesViewController
   }
}

Segue正在执行两次，导致下一个VC。如何防止这种情况发生？

Segue is being executed twice leading to the next VC. How can I prevent this from happening?

推荐答案

你是两次执行segue的人 - 一次自动在故事板中（因为你的segue从单元格原型中发出一个动作Segue），并且当你说 self.performSegueWithIdentifier 时在代码中。如果您不希望segue执行两次，请删除其中一个。

You are the one executing the segue twice — once automatically in the storyboard (because your segue emanates as an Action Segue from the cell prototype), and once in code when you say self.performSegueWithIdentifier. If you don't want the segue executed twice, remove one of those.

我个人建议您删除 didSelectRow 完全将您的 self.selectedClubState 转移到 prepareForSegue 。

Personally, my recommendation is that you delete didSelectRow entirely and move your self.selectedClubState assignment into prepareForSegue.

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