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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