How would I go about removing a subview when there is text in a UITextField

Question

So far this is my attempt at achieving this.

    if searchBar.text == ""
    {
        searchBar.addSubview(placeholder)

        searchBar.addConstraintsWithFormat("V:|[v0]|", views: placeholder)

        phconstraint = NSLayoutConstraint(item: placeholder, attribute: .centerX, relatedBy: .equal, toItem: searchBar, attribute: .centerX, multiplier: 1, constant: 0)
    }
    else
    {
        placeholder.removeFromSuperview()
    }

The above code best explains the logic behind what I want to achieve. Is there some method in UITextField to detect the addition of text or maybe some notification?

Any suggestions?

Does this placeholder view provides any custom functionality than the default placeholder text option? Have you tried using `UITextFieldDelegate`'s method `textFieldDidBeginEditing`? — R P, Apr 29 '17 at 03:21

score 0 · Accepted Answer · answered Apr 29 '17 at 03:37

This is the method where you should be writing logic to hide/ show your view:

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        let currentString: String = (textField.text! as NSString).replacingCharacters(in: range, with: string)
        let length: Int = (currentString.characters.count )

        if(length >= 1){
        //show
        }
        else{
        //hide
        }
       return true
    }

How would I go about removing a subview when there is text in a UITextField

1 Answers1