执行 segue 时出现异常

Question

我使用 Swift2 和 Xcode 7.1

我想在单击 tableViewCell 中存在的 collectionCell 时触发 segue。
只有我有一个标识符错误。

然而，我已经在我的故事板中说了我的好话。

错误：

由于未捕获的异常 'NSInvalidArgumentException' 导致应用程序终止，原因：'Receiver () has no segue with identifier 'look''

    class PostsCell: UITableViewCell, UICollectionViewDataSource, UICollectionViewDelegate {

    var controller: PostsController!

    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override func setSelected(selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }


    func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {

        controller.perform(data![indexPath.item])

    }

    // ...

}

我的控制器：

class PostsController: UITableViewController {

// ....

override func viewDidLoad() {
    super.viewDidLoad()

    // ...
}

// ...

func perform(post: Post) {
    self.post = post
    self.performSegueWithIdentifier("look", sender: self)
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if (segue.identifier == "look") {
        let viewController:SeePostController = segue.destinationViewController as! SeePostController
        viewController.data = self.post
    }
}

}

Answer 1

用self.performSegueWithIdentifier("look", sender: self)代替PostsController().performSegueWithIdentifier("look", sender: self)

更新 创建一个新的视图控制器实例并调用您的 perform 方法。

var controller: PostsController!
controller.perform(data![indexPath.item])