Swift how to resign first responder on all uiTextfield
A simpler approach would by to end editing on the UIView containing the UITextFields by saying: view.endEditing(true)
uitextfielddelegate
Format UITextField text without having cursor move to the end
The way to make this work is to grab the location of the cursor, update the field contents, and then replace the cursor to its original position. I’m not sure of the exact equivalent in Swift, but the following is how I would do it in Obj-C. – (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { UITextPosition … Read more
How to detect delete key on an UITextField in iOS 8?
A lot of people have been saying this is a bug, but being that this problem still exists in the GM I’m starting to think it might be a change in logic. With that said, I wrote this bit of code for my app and have tested it on iOS 7-8. Add the following method … Read more
Detect backspace Event in UITextField
Swift 4.2 func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool { if let char = string.cString(using: String.Encoding.utf8) { let isBackSpace = strcmp(char, “\\b”) if (isBackSpace == -92) { print(“Backspace was pressed”) } } return true } Older Swift version func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool { let … Read more
Cannot assign a value of type ViewController to a value of type UITextFieldDelegate?
The line self.MessageTextField.delegate = self causes the error since you try to assign self as the delegate of a UITextField. But your ViewController is not a UITextFieldDelegate. To make your class this kind of delegte, you need to adopt the UITextFieldDelegate protocol. This can be achieved by adding it to the list of protocols and … Read more
Switching between Text fields on pressing return key in Swift
Make sure your UITextField delegates are set and the tags are incremented properly. This can also be done through the Interface Builder. Here’s a link to an Obj-C post I found: How to navigate through textfields (Next / Done Buttons) class ViewController: UIViewController,UITextFieldDelegate { // Link each UITextField (Not necessary if delegate and tag are … Read more
How shouldChangeCharactersInRange works in Swift?
Swift 4, Swift 5 This method doesn’t use NSString // MARK: – UITextFieldDelegate extension MyViewController: UITextFieldDelegate { func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { if let text = textField.text, let textRange = Range(range, in: text) { let updatedText = text.replacingCharacters(in: textRange, with: string) myvalidator(text: updatedText) } return true } … Read more
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 … Read more