With the UITextFieldDelegate, I'm disabling my UIButton "btnSignup" based on whether 3 UITextFields contain information or not. Currently, it works appropriately minus the fact that for the UIButton to reactive (run through the if statement again), I have to click off of the UITextField. The same is true for when I've typed something and I go back to delete it. The UIButton remains active until I click off of the UITextField (if I click submit without clicking elsewhere, I am able to submit, which shouldn't be the case.)
class MainVC: UIViewController, UITextFieldDelegate {
@IBOutlet var receiveName: UITextField!
@IBOutlet var receiveEmail: UITextField!
@IBOutlet var receivePhone: UITextField!
@IBOutlet var btnSignup: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
self.btnSignup.enabled = false
self.btnSignup.alpha = 0.3
self.receiveName.delegate = self
self.receiveEmail.delegate = self
self.receivePhone.delegate = self
func textFieldDidBeginEditing(textField: UITextField) {
if countElements(receiveName.text) > 0 && countElements(receiveEmail.text) > 0 && countElements(receivePhone.text) > 0 {
self.btnSignup.enabled = true
self.btnSignup.alpha = 1
} else {
self.btnSignup.enabled = false
self.btnSignup.alpha = 0.3
}
}
}
I am looking for a solution that gives a more realtime effect. The function should be listening and responding if at any time the UITextField is being edited.
Using something close to your code I could do this as below. I added 3 class level. variables to record if the text fields had something entered. I added tags to the text fields. I changed the UITextFieldDelegate class func and tested that all three fields have text. The second you enter a field in the third field, the button lights up!
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
var receiveNameBool = false
var receiveEmailBool = false
var receivePhoneBool = false
@IBOutlet var receiveName: UITextField!
@IBOutlet var receiveEmail: UITextField!
@IBOutlet var receivePhone: UITextField!
@IBOutlet var btnSignup: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
self.btnSignup.enabled = false
self.btnSignup.alpha = 0.3
self.receiveName.delegate = self
self.receiveEmail.delegate = self
self.receivePhone.delegate = self
}
func textField(textField: UITextField!, shouldChangeCharactersInRange range: NSRange, replacementString string: String!) -> Bool {
if textField.tag == 1 {
receiveNameBool = true
} else if textField.tag == 2 {
receiveEmailBool = true
} else if textField.tag == 3 {
receivePhoneBool = true
}
if receiveNameBool && receiveEmailBool && receivePhoneBool {
self.btnSignup.enabled = true
self.btnSignup.alpha = 1
} else {
self.btnSignup.enabled = false
self.btnSignup.alpha = 0.3
}
return true
}
}
Okay, in this second version, I used the textFieldDidBeginEditing func you used. Un this case the second you click inside the third field the button is enabled. In both examples you need to still write code to deal with the case if the user deletes the data they entered. But the first example above gets you what you wanted.
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
var receiveNameBool = false
var receiveEmailBool = false
var receivePhoneBool = false
@IBOutlet var receiveName: UITextField!
@IBOutlet var receiveEmail: UITextField!
@IBOutlet var receivePhone: UITextField!
@IBOutlet var btnSignup: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
self.btnSignup.enabled = false
self.btnSignup.alpha = 0.3
self.receiveName.delegate = self
self.receiveEmail.delegate = self
self.receivePhone.delegate = self
}
func textFieldDidBeginEditing(textField: UITextField) {
if textField.tag == 1 {
receiveNameBool = true
} else if textField.tag == 2 {
receiveEmailBool = true
} else if textField.tag == 3 {
receivePhoneBool = true
}
if receiveNameBool && receiveEmailBool && receivePhoneBool {
self.btnSignup.enabled = true
self.btnSignup.alpha = 1
} else {
self.btnSignup.enabled = false
self.btnSignup.alpha = 0.3
}
}
}