Swift-如何使用从ViewController到特定TabBarController的按钮进行搜索

Question

From a ViewController before a TabBarController in Swift, I would like to send to a specific Tab after the TabBarController that may be a NavigationController or a simple ViewController.

For the moment I make like this:

@IBAction func settingsButtonPressed(sender: AnyObject) {
        tabBarController?.selectedIndex = 3 // 4d tab
        performSegueWithIdentifier("tabBarShow", sender: self)
}

With this action, it performs the segue but it always show the first tab.

Thanks for the help!

Answer 1

You can use:

 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if(segue.identifier == "tabBarShow"){
        if let tabVC = segue.destinationViewController as? UITabBarController{
            tabVC.selectedIndex = 3
        }
    }
}

Answer 2

You can try set the selectedViewController property instead of the selectedIndex :

tabBarController.selectedViewController = tabBarController.viewControllers![2]

This person had the same problem: https://stackoverflow.com/a/17919837/3933375

EDIT This is on the assumption that the tabBarController has been initialised, if not you'll need to initialise it first.

Answer 3

You are setting the selected index before the TabbarController is loaded , so store your selected index somewhere , and set this in TabBarViewController's ViewDidLoad.

self.selectedIndex = valueOFSelectedIndexStored;