如何使用swift中的参数返回之前的视图控制器

Question

当ViewController A中的按钮被点击时，TableViewController B显示出来。用户在B中选择一个项目，然后返回到A.我使用下面的代码从B返回A.但是，如何将所选项目([Int: String])传递给A？

navigationController?.popViewControllerAnimated(true) 

下面是代码从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

，当您移动从TableViewController B到ViewController A集导航到B在你ViewController A类中创建一个空的Dictionary这样

var dict = [Int: String]()  

现在值为dict这样的

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)