CODEWITHSUNDEEP
xcodeuinavigationbaruialertcontroller
Eli McClellan
Eli McClellan

Reputation: 25

Changing Title via Alert Controller

I want to be able to change the title displayed in the navigationBar. I have the alertController setup and it appears fine, however after inputting the newTitle text, the current title disappears but the new title doesn't appear. I have tried reloading data in the viewDidLoad, viewWillAppear, as well as in the button press event itself (as shown in code). Any input is appreciated.

    @IBAction func changeTitleBarButtonPressed(_ sender: UIBarButtonItem) {

        let titleChange = UIAlertController(
            title: "Change Title",
            message: "Please input text to change the title",
            preferredStyle: .alert)

        titleChange.addTextField { (textField) in
            textField.placeholder = "Input new title"
        }

        titleChange.addAction(UIAlertAction(
            title: "Cancel",
            style: .cancel,
            handler: { (cancelAction) in
                titleChange.dismiss(animated: true)
        }))

        titleChange.addAction(UIAlertAction(
            title: "Change Title",
            style: .default,
            handler: { (changeAction) in
                let newTitle = self.textField?.text
                titleChange.dismiss(animated: true)
                self.navigationItem.title = newTitle
                self.imagesTableView.reloadData()
        }))

        self.present(titleChange, animated: true)

    }

Upvotes: 2

Views: 93

Answers (1)

Mojtaba Hosseini
Mojtaba Hosseini

Reputation: 119340

The only problem is you read the text value from unrelated textField (And its probably nil or empty). You may want to use the first textField of the alert instead of self.textField?.text:

titleChange.addAction(UIAlertAction(
    title: "Change Title",
    style: .default,
    handler: { (changeAction) in
        let newTitle = titleChange.textFields![0].text // instead of `self.textField?.text`
        titleChange.dismiss(animated: true) // this line is not required. You can get rid of it freely.
        self.navigationItem.title = newTitle
}))

Make sure you are no setting the navigationItem.title elsewhere (like viewWillAppear or etc.)

Upvotes: 1

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