CODEWITHSUNDEEP
iosswifttabstabbed-view
kinza
kinza

Reputation: 555

How to programmatically open certain tab of a view controller

I am writing a code in which I have a view controller with certain tabs. Upon the dismissal of a an alert, I want open 2nd tab automatically. For this purpose I posted a local notification when the alert this dismissed. The observer for this notification is in home view controller, when this observer is called, 2nd tab of the view controller is selected. Here is my code for a better understanding:

vc.dismiss(animated: true, completion: { 
// vc is the view controller in which my custom alert is shown

NotificationCenter.default.post(name: NSNotification.Name.OpenConsumerTab, 
                                    object: ConsumerHomeTab.Stats.rawValue)
})

And home view controller: (question related code)

NotificationCenter.default.addObserver(self,
                                       selector: #selector(onOpenConsumerTabNotificationRecieved(notification:)),
                                       name: Notification.Name.OpenConsumerTab,
                                       object: nil)

@objc public func onOpenConsumerTabNotificationRecieved(notification: Notification) {

    if (notification.object as! Int == ConsumerHomeTab.Stats.rawValue)
    {
        selectedIndex = 1
    }
}

This is opening the tab but the output I am obtaining is this: (getting an extra black bar)

enter image description here

Why is this happening? Maybe it is showing up a completely new home view controller (with tab bar) but what is the reason? Correct me if I am wrong as I am newbie to iOS.

Things I have tried:

Upvotes: 2

Views: 2123

Answers (2)

Nilomi Shah
Nilomi Shah

Reputation: 186

I think there is no need of using Notification center too, u can write this code when you are dismissing that VC

to dismiss your alert

 alert.dismissWithClickedButtonIndex(-1, animated: true)

to change View-Controller:

 self.tabBarController?.selectedIndex = selectedTabIndex 


 // selectedTabIndex is the index of ViewController which you want to select

Upvotes: 3

Vinod N
Vinod N

Reputation: 148

Please use tabbarController instance to set selected index as, may be you not using tabbar controller instance to set index :

if let tababarController = self.window!.rootViewController as! UITabBarController? { tababarController.selectedIndex = 1
}

Upvotes: 0

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