如何使用swift中的參數返回之前的視圖控制器

Question

當ViewController A中的按鈕被點擊時，TableViewController B顯示出來。用戶在B中選擇一個項目，然後返回到A.我使用下面的代碼從B返回A.但是，如何將所選項目([Int: String])傳遞給A？

navigationController?.popViewControllerAnimated(true) 

下面是代碼從A

let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil) 

let nextViewController = storyBoard.instantiateViewControllerWithIdentifier("categories") as! CategoryListViewController 

self.presentViewController(nextViewController, animated:true, completion:nil) 

Answer 1

，當您移動從TableViewController B到ViewController A集導航到B在你ViewController A類中創建一個空的Dictionary這樣

var dict = [Int: String]()  

現在值爲dict這樣的

let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil) 

let nextViewController = storyBoard.instantiateViewControllerWithIdentifier("categories") as! CategoryListViewController 

// here you pass parameter to ViewController A 

nextViewController.dict = YourVaribleWhichStrore[Int:String] 

self.presentViewController(nextViewController, animated:true, completion:nil)