轉發模式的UIView

Question

當用戶選擇從UITableViewController一個UITableCell一個節目賽格瑞朝執行UINavigationController：

import UIKit 

class ItemNavigationController: UINavigationController { 

    // this is our "model" - its value is set by the "prepareForSegue" method of the parent UITableViewController 
    var item: String? 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     // here I want to "forward" the "model" to the ItemViewController 
     // self.someMethodToGetItemViewController.item = item 
    } 

} 

當我們的模型被設置在ItemViewController我們「刷新」標籤：

import UIKit 

class ItemViewController: UIViewController { 

    var item: String! 

    @IBOutlet 
    weak var nameLabel: UILabel! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     // does not do anything because item is empty... 
     nameLabel.text = item 
    } 

} 

我如何設置item PR從ItemNavigationController開始ItemViewController？

Answer 1

如果ItemViewController是ItemNavigationController的topViewController，那麼你可以直接通過調用topViewController方法得到它，否則，你應該通過ItemNavigationController的viewControllers財產循環，並發現它。