'Swift: Become First Responder on UITextField Not Working?

I've created a custom UIViewController with one UITextField on Storyboard. On viewDidLoad, I set the UITextFIeld to becomeFirstResponder, nothing happened (no keyboards popped up).

I then tried calling resignFirstResponder(), but it returned false. Next I tried to find who the first responder is through looping all the subviews using the code over @ Get the current first responder without using a private API. It turns out none of the sub views are the first responder.

My ViewController in storyboard

enter image description here

My Code

class BLTestViewController: UIViewController, UITextFieldDelegate {

    @IBOutlet var tf: UITextField

    override func viewDidLoad() {
        super.viewDidLoad()

        tf.delegate = self
        tf.becomeFirstResponder()
        // Do any additional setup after loading the view.
    }
}

As simple as it gets...WHY ISN'T THE KEYBOARD COMING UP!!! One thing I do have on is auto layout, but I'm not sure if that affects the keyboard popping up.

Solution 1:^[1]

Swift 4 it worked for me
try it

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    
    textView.becomeFirstResponder()
    
}

Solution 2:^[2]

I just tested it with a textfield by calling self.tf.becomeFirstResponder() indside viewDidLoad() function and its working absolutely fine. You'll need to toggle your keyboard by pressing command + K as nflacco just pointed out and disable the hardware keyboard in the simulator as:

iOS Simulator -> Hardware -> Keyboard
Uncheck "Connect Hardware Keyboard"

Solution 3:^[3]

I think

class BLTestViewController: UIViewController, UITextFieldDelegate {

@IBOutlet var tf: UITextField

    override func viewDidLoad() {
        super.viewDidLoad()

        tf.delegate = self
        self.focustf()
        // Do any additional setup after loading the view.
    }

    func focustf(){
    self.tf.becomeFirstResponder()
    }
}

Solution 4:^[4]

Swift 4 and iOS 11

In my case, no mater what I tried, I was not able to set first responder until I tried this.

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    if cell.isKind(of: YOURTABLEVIEWCELL.self) {
        if let yourCell = cell as? YOURTABLEVIEWCELL{
            yourCell.yourUiTextField.becomeFirstResponder()
        }
    }
}

Hope this helps someone stuck with the same problem.

Solution 5:^[5]

Try setting it after a delay:

DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
    textField.becomeFirstResponder()
}

sometimes the wrong is the time in render the view

Solution 6:^[6]

If you are using the iOS Simulator, press ? command + shift + K to open the keyboard.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	ohglstr
Solution 2	4aRk Kn1gh7
Solution 3	Hitesh
Solution 4	Derek Hierholzer
Solution 5	pkamb
Solution 6	shim

'Swift: Become First Responder on UITextField Not Working?

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]