Xcode 为didSelectRowAtIndexPath和IBAction执行带有标识符的GUE

代码将打开第一个ViewController，它工作正常：

    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    self.performSegueWithIdentifier("openDates", sender: self.dates[indexPath.row])
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    let tasksViewController = segue.destinationViewController as! TasksViewController
    tasksViewController.selectedList = sender as! Dates
}

此代码打开第二个ViewController，但它不工作：

    @IBAction func ShowDetails(sender: UIBarButtonItem) {
    self.performSegueWithIdentifier("openDetails", sender: sender)
}

错误消息：

无法将“dante.DetailsViewController”（0x10b60b2e0）类型的值强制转换为“dante.TasksViewController”（0x10b60adc0）

---

您正在调用两个单独的segue，并在

prepareforsgue

中为这两个segue使用相同的代码，这意味着您试图将两个单独的视图控制器强制转换为一个视图控制器。将代码更改为：

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "openDates" {
        let tasksViewController = segue.destinationViewController as! TasksViewController
        tasksViewController.selectedList = sender as! Dates
    }
    else if segue.identifier == "openDetails" {
        let detailsViewController = segue.destinationViewController as! DetailsViewController 
        // Do stuff
        // If you're not doing stuff, remove this else if block
        // The if statement will still catch and prepare the other segue
    }
}