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[英]Swift: UIButton within a custom UITableViewCell 'Unrecognised selector sent to instance' error
[英]Identifying UIButton within UITableViewCell not working - Swift
我試圖通過在單元格中按下的按鈕來標識單元格索引。 完成此操作后,我試圖將信息傳遞給另一個viewController
原始文章可以在這里找到: 檢測在表視圖中按下的uibutton:Swift最佳實踐
我的代碼當前如下所示:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let myCell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! questionCell
//indicates which button was pressed
myCell.button.tag = indexPath.row
myCell.button.addTarget(self, action: "buttonClicked:", forControlEvents: UIControlEvents.TouchUpInside)
return myCell
}
var selectedRow = Int()
//sets selected row variable to the row that was selected
func buttonClicked(sender:UIButton) {
selectedRow = sender.tag
}
//sets the id of the question that was selected in the answers view controller
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var destinationView: AFeedTableViewController = segue.destinationViewController as! AFeedTableViewController
destinationView.currentQuestionId = idResults[selectedRow]
}
我的問題是prepareForSegue函數在buttonClicked函數之前被調用,因此沒有更新我傳遞給另一個視圖控制器的值。 誰能解釋如何解決這個問題? 謝謝
編輯:單擊按鈕時,將執行segue
假設您的segue已連接到按鈕,則不需要額外的目標。 您可以通過prepareForSegue:sender:
的發件人對象訪問按鈕prepareForSegue:sender:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
guard let button = sender as? UIButton else { return }
guard let destinationViewController = segue.destinationViewController as? AFeedTableViewController else { return }
destinationViewController.currentQuestionId = idResults[button.tag]
}
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