CODEWITHSUNDEEP
swiftuitextviewuitoolbar
Yiu Chung Wong
Yiu Chung Wong

Reputation: 167

Disable/enable UIBarButtonItem base on UITextView content swift

I'm trying to grey out a UIBarButtonItem when the TextView is empty, and enable it when the TextView isn't empty. 

class ViewController: UIViewController {
@IBOutlet weak var text: UITextView!

override func viewDidLoad() {
    super.viewDidLoad()


    let newButton = UIBarButtonItem(barButtonSystemItem: .compose, target: self, action: nil)
    toolbarItems = [newButton]
    navigationController?.isToolbarHidden = false

}

I have heard suggestion about implementing an observer or implementing a TextView delegate method. Can someone please provide a concrete example.

Thank you so much.

Upvotes: 0

Views: 124

Answers (1)

Kristoff
Kristoff

Reputation: 213

Please try my code.

I used it for my project.

func textChanged(sender: NSNotification) {
    if emailTextField.hasText && passwordTextField.hasText {
        loginButton.isEnabled = true
        loginButton.backgroundColor = UIColor(r: 139, g: 0, b: 139)
    } else {
        loginButton.backgroundColor = UIColor(r: 139, g: 77, b: 139)
        loginButton.isEnabled = false
    }
}

and add this to viewDidload:

NotificationCenter.default.addObserver(self,selector: #selector(textChanged),name:NSNotification.Name.UITextFieldTextDidChange,object: nil)
loginButton.isEnabled = false

Upvotes: 3

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