swift - 如何将数据从 AKSwiftSlideMenu 菜单传递到 Swift 中的 UIViewController？

Question

大家好，我在项目中使用 AKSwiftSlideMenu 来实现滑动菜单功能，我想知道是否有办法让我可以在从菜单切换到目标 ViewController 标题时更改目标 ViewController 标题？我试过这段代码，但没有将数据传递到目的地:

func slideMenuItemSelectedAtIndex(index: Int32) {
let topViewController : UIViewController = self.navigationController!.topViewController!
print("View Controller is : \(topViewController) \n", terminator: "")
switch(index){
case 0:
    print("Note\n", terminator: "")
    var nextVC = AddSubcategoryVC()
    nextVC.categoryName = "Note"
    self.openViewControllerBasedOnIdentifier("AddSubcategoryVC") 
    print("On menu the cat is: \(nextVC.categoryName)")
    break
default:
    print("default\n", terminator: "")
} 
}

在目标 View Controller 上，我有这个变量，用于从菜单中获取数据:

var categoryName = ""

它返回“nil”。我也试过这样做:

var categoryName : String!

还有这个:

var categoryName = String()

全部返回 'nil'。

Answer 1

您已经创建了新的 View Controller 对象。

替换这段代码:

var nextVC = AddSubcategoryVC()
nextVC.categoryName = "Note"
self.openViewControllerBasedOnIdentifier("AddSubcategoryVC") 

与

let destViewController = self.storyboard!.instantiateViewControllerWithIdentifier("AddSubcategoryVC") as! AddSubcategoryVC
destViewController.categoryName = "Note"// You have to pass your data with view controller witch will open
let topViewController : UIViewController = self.navigationController!.topViewController!

if (topViewController.restorationIdentifier! == destViewController.restorationIdentifier!){
    print("Same VC")
} else {
    self.navigationController!.pushViewController(destViewController, animated: true)
}