Uitextfield Text Change Event

UITextField text change event

From proper way to do uitextfield text change call back:

I catch the characters sent to a UITextField control something like this:

// Add a "textFieldDidChange" notification method to the text field control.

In Objective-C:

[textField addTarget:self 
action:@selector(textFieldDidChange:)
forControlEvents:UIControlEventEditingChanged];

In Swift:

textField.addTarget(self, action: #selector(textFieldDidChange), for: .editingChanged)

Then in the textFieldDidChange method you can examine the contents of the textField, and reload your table view as needed.

You could use that and put calculateAndUpdateTextFields as your selector.

How do I check when a UITextField changes?

SWIFT

Swift 4.2

textfield.addTarget(self, action: #selector(ViewController.textFieldDidChange(_:)), for: .editingChanged)

and

@objc func textFieldDidChange(_ textField: UITextField) {

}

SWIFT 3 & swift 4.1

textField.addTarget(self, action: #selector(ViewController.textFieldDidChange(_:)), for: .editingChanged)

and

func textFieldDidChange(_ textField: UITextField) {

}

SWIFT 2.2

textField.addTarget(self, action: #selector(ViewController.textFieldDidChange(_:)), forControlEvents: UIControlEvents.EditingChanged)

and

func textFieldDidChange(textField: UITextField) {
//your code
}

OBJECTIVE-C

[textField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];

and textFieldDidChange method is

-(void)textFieldDidChange :(UITextField *) textField{
//your code
}

UITextField Editing Changed not call

Use EditingChanged on action. It works on mine.

How to listen to UITextField text change event in Nativescript?

As described here: https://docs.nativescript.org/ui/components/text-view and here: https://docs.nativescript.org/ui/basics#event-binding, you can do it like this:

<TextView textChange="onTextChange" >
</TextView>

then in JS:

function onTextChange(args) {
// Do your thing
}

There is nothing iOS specific, this should work on both platforms.

UITextField Value Changed Event?

Objective-C

[myTextField addTarget:self 
action:@selector(textFieldDidChange:)
forControlEvents:UIControlEventEditingChanged];

Swift 4

myTextField.addTarget(self, action: #selector(textFieldDidChange(sender:)), for: .editingChanged)

@objc func textFieldDidChange(sender: UITextField) {...}

Change the text of a UITextField on text change of another text field

Create an Array :

var myArray= [String]()

In viewDidLoad do this, Assign action when user did some changes in Text Fields(do this for all textfield/1,2,3,4,5):

textField1.addTarget(self, action: "textFieldDidChange:", forControlEvents: UIControlEvents.EditingChanged)

textField2.addTarget(self, action: "textFieldDidChange:", forControlEvents: UIControlEvents.EditingChanged)

when user edits something this method will be called:

func textFieldDidChange(textField: UITextField) {
myArray.removeAll()

if !textField1.isEmpty {
myArray.append(textField1.text)
}

if !textField2.isEmpty {
myArray.append(textField2.text)
}

if !textField3.isEmpty {
myArray.append(textField3.text)
}

if !textField4.isEmpty {
myArray.append(textField4.text)
}

if !textField5.isEmpty {
myArray.append(textField5.text)
}

textField6.text = myArray.joinWithSeparator(":")
}

text changed event in UITextView

You need to set the delegate inside viewDidLoad

textView.delegate = self

//

class ViewController: UIViewController , UITextViewDelegate  {


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