Question

我有一个标签栏控制器，在该标签栏内有五个视图控制器。我也有一个在homeVC上的右视图controller（抽屉）。对于rightViewController，我使用MMDrawerController来源：https://www.youtube.com/watch?time_continue=1468&v=TdKnImb4SWs。在appdelegate中。现在，当右视图控制器关闭时，将调用哪个视图控制器生命周期？因为我想写一个函数。我已在appdelegate

上使用过此代码

    let rightViewController = mainStoryboard.instantiateViewController(withIdentifier: "RightViewVC") as! RightViewVC



       UINavigationBar.appearance().titleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.white]

    let rightSideMenuNav = UINavigationController(rootViewController: rightViewController)
    drawerController = MMDrawerController(center:mainPage,rightDrawerViewController:rightSideMenuNav)

   // drawerController!.openDrawerGestureModeMask = MMOpenDrawerGestureMode.panningCenterView
    drawerController!.closeDrawerGestureModeMask = MMCloseDrawerGestureMode.panningCenterView
    drawerController!.closeDrawerGestureModeMask = MMCloseDrawerGestureMode.all
    drawerController!.preferredInterfaceOrientationForPresentation = MMDrawerOpenCenterInteractionMode.full

    window?.rootViewController = drawerController

Answer 1

关闭rightViewController时，将调用homeViewController中的viewwillApear()。

Answer 2

MMDrawer在打开，关闭或切换抽屉时提供完成块，您只需要比较抽屉关闭或打开等事件即可获得成功。这是代码

@IBAction func rightMenuButtonTapped(_ sender: Any) { 

    let appdelegate = UIApplication.shared.delegate as! AppDelegate 

    appdelegate.drawerController?.toggle(MMDrawerSide.right, animated: true){ (isCompleted) in 
            if appdelegate.drawerController?.openSide == MMDrawerSide.none 
            { 
                 print("drawer close")
                 if let objHome = appdelegate.drawerController?.centerViewController as? HomeVC{ 
                      print("Got Home VC") 
                 }  
            } 
            else if appdelegate.drawerController?.openSide == MMDrawerSide.right 
            { 
                 print("drawer open") 
            } 
     }
}

Answer 3

尝试在每个viewDidLoad中打印以查看活动的控制器：

if let window = UIApplication.shared.delegate?.window {
    if var viewController = window?.rootViewController {
        // handle navigation controllers
        if(viewController is UINavigationController){
            viewController = (viewController as! UINavigationController).visibleViewController!
        }
        print(viewController)
    }
}

或

if self.window.rootViewController is MyViewController {
    //do something if it's an instance of that class
}

关闭MMDrawer Controller后，将在swift4中调用哪个视图控制器生命周期方法？

3 个答案: