Urgently: How can I change the selectedIndex tab?

[ramotion]

Urgently: How can I change the selectedIndex tab?

[cdf1982]

It looks like I made it work, but I don't really like my own solution, so anyone more expert than me (meaning, everyone ;) is more than welcome to suggest a better way.

If you need to start your app in a different tab from the first one, it's pretty straightforward; in AppDelegate, inside application:DidFinishLaunchingWithOptions:

        let ramTBC = self.window!.rootViewController as! RAMAnimatedTabBarController

        ramTBC.selectedIndex = myDestination

        ramTBC.setSelectIndex(from: 0, to: myDestination)  // Because by default createCustomIcons() of RAMAnimatedTabBarController sets the selectedState for the item at index 0

If you need to switch programmatically from one tab to another during the execution of the app:

        let currentIndex : Int? = self.tabBarController?.selectedIndex

        self.tabBarController?.selectedIndex = myDestination

        if let ramTBC = self.tabBarController as? RAMAnimatedTabBarController,
           let current = currentIndex {

            ramTBC.setSelectIndex(from: current, to: myDestination)
        }

I hope it helps.

@cdf1982

[aalzanki]

I just added a new method called setSelectedTabToIndex to the RAMAnimatedTabBarController class

func setSelectedTabToIndex(index: Int) {
    let items = tabBar.items as! [RAMAnimatedTabBarItem]

    let currentIndex = index
    if selectedIndex != currentIndex {
        let animationItem : RAMAnimatedTabBarItem = items[currentIndex]
        let icon = iconsView[currentIndex].icon
        let textLabel = iconsView[currentIndex].textLabel
        animationItem.playAnimation(icon, textLabel: textLabel)

        let deselelectIcon = iconsView[selectedIndex].icon
        let deselelectTextLabel = iconsView[selectedIndex].textLabel
        let deselectItem = items[selectedIndex]
        deselectItem.deselectAnimation(deselelectIcon, textLabel: deselelectTextLabel)

        selectedIndex = index
    }
}

[wei-go]

Based on @aalzanki solution,
I modified the function as easier below

RAMAnimatedTabBarController.swift

open func setSelectedTabToIndex(index: Int) {
        guard let items = tabBar.items as? [RAMAnimatedTabBarItem] else {
            fatalError("items must inherit RAMAnimatedTabBarItem")
        }
        let currentIndex = index
        if selectedIndex != currentIndex {
            let animationItem : RAMAnimatedTabBarItem = items[currentIndex]
            let animationItemSelected : RAMAnimatedTabBarItem = items[selectedIndex]
            animationItem.playAnimation()
            animationItemSelected.deselectAnimation()
            selectedIndex = index
        }
    }

Usage
If your TabBarController is addressed under app.window as rootViewController,
you can make a class function to control your TabBarController

AppHelper.swift

class AppHelper: NSObject {
class func selectTabBarIndexTo(index: Int) -> Void {
        if let app = UIApplication.shared.delegate as? AppDelegate, let window = app.window {
            (window.rootViewController as! RAMAnimatedTabBarController).setSelectedTabToIndex(index: index)
        }
    }
}

and call above function from the other ViewController class

AppHelper.selectTabBarIndexTo(index: 0) // To tabIndex

@aalzanki Thanks for your answer to solved my issue 👍

[cdf1982]

I have the same issue, have you figured out a solution?

[TareqElMasriDev]

@cdf1982 @aalzanki Thanks guys, that was helpful, I'll test it and I'll inform you

[randeepbhatia]

The func setSElectedTabToIndex raises null pointer exception

[cdf1982]

Have you tried my approach?

Il giorno 05/ago/2015, alle ore 02:14, Randeep [email protected] ha scritto:

The func setSElectedTabToIndex raises null pointer exception

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Reply to this email directly or view it on GitHub.

[TareqElMasriDev]

@cdf1982 your soultion worked perfectly, thanks man

[sentiasa]

@cdf1982 Thanks man! I tried the AppDelegate part and your solution worked perfectly.

However, my icon is using BounceAnimation but for the initial part (the AppDelegate part), the icon gets initialised with some offset below.. Is there a way to push it back up manually in the AppDelegate (to achieve it with a workaround) because on the other times later in the app, it behaves as expected. It's just the AppDelegate part. What may be the problem? How can I overcome this do you think? Thanks

[sesur]

@cdf1982 I have found other way to set up you preferred tab when app starts, use:

func viewWillAppear(_ animated: Bool) 
{
        super.viewWillAppear(true)
         setSelectIndex(from: 0, to: yourPreferredTab)
    }