I have multiple textfields
#IBOutlet var emailLogin: UITextField!
#IBOutlet var passLogin: UITextField!
#IBOutlet var emailSignUp: UITextField!
#IBOutlet var passSignUp: UITextField!
as of now these aren't really needed, because of how I am dismissing it by tapping anywhere on the screen, however I also want it to dismiss when I press the return key.
override func viewDidLoad() {
super.viewDidLoad()
self.emailLogin.delegate = self
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(LoginViewController.dismissKeyboard))
view.addGestureRecognizer(tap)
}
First question: When I need to dismiss with only one I would set the delegate like so, but how do I handle this when I have multiple views that need to be dismissed on return key?
Also, there are two separate views, but both use the same class. Is this a problem for what I am trying to do?
From here
func dismissKeyboard() {
view.endEditing(true)
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
This dismisses the keyboard but only for the textfield that I set as self.
Any info is appreciated!
EDIT:
Change your code to the following and it should work:
#IBOutlet var emailLogin: UITextField?
#IBOutlet var passLogin: UITextField?
#IBOutlet var emailSignUp: UITextField?
#IBOutlet var passSignUp: UITextField?
emailLogin?.delegate = self
passLogin?.delegate = self
emailSignUp?.delegate = self
passSignUp?.delegate = self
The IBOutlets from other class were not initialized when your LoginViewController loads, thus end up with unwrapping nil objects, which is not allowed in Swift. (You should be able to see that in your console output in Xcode.) Use optional variables will prevent that from happening.
Use ViewControllerDelegate to handle tap outside of any textField and textView. It will dismiss keyboard when you tap on outside of textField. Put below code in your view controller:
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
super.touchesBegan(touches, withEvent:event)
self.view.endEditing(true)
}
You don't need to add TapGesture now to handle this.
Related
My app has two UITextFields. Both I have dismissing by tapping the background because they are using the decimal keyboard. I want it so if say textField1 is up and you tap the background a specific button pops up with the actions for textField1 and vice versa. Currently if you tap the background with out any keyboard up it still pops up a button. Any help would be awesome thanks.
#IBOutlet weak var textField: UITextField!
#IBOutlet weak var button: UIButton!
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
button.isHidden = false
}
override func viewDidLoad() {
super.viewDidLoad()
self.textField.delegate = self
button.isHidden = true
}
My save button is hidden with the function saveBtnHidden() in the code below. However, the save button won't reappear when text is typed into the text field. I have tried multiple solutions similar to this. Every time that I type into the text field, the save button just won't show up.
import UIKit
class TableViewController: UITableViewController, UITextFieldDelegate {
#IBOutlet weak var saveBtn: UIButton!
#IBOutlet var nicknameField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
saveBtnHidden()
}
func saveBtnHidden() {
if (nicknameField.text?.isEmpty ?? true) {
// is empty
saveBtn.isHidden = true
} else {
saveBtn.isHidden = false
}
}
#IBAction func saveBtnPressed(_ sender: Any) {
performSegue(withIdentifier: "nextPage", sender: nil)
}
}
You are getting this error because your function saveBtnHidden() is only called once in viewDidLoad(). It does not get called again when the text in your text field changes. To detect when text changes, you will need to add a target to your text field that calls a function when it changes (.editingChanged) like this:
nicknameField.addTarget(self, action: #selector(textFieldDidChange(_:)), for: .editingChanged)
Then in the textFieldDidChange call your saveBtnHidden() function:
func textFieldDidChange(_ textField: UITextField) {
saveBtnHidden()
}
Code adapted from: How do I check when a UITextField changes?
Use delegate to be notify of any change. Delegates is a key part of iOS development and Apple's framework.
class TableViewController: UITableViewController, UITextFieldDelegate {
#IBOutlet weak var saveBtn: UIButton!
#IBOutlet var nicknameField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
saveBtnHidden()
nicknameField.delegate = self
}
func textFieldDidChange(_ textField: UITextField) {
saveBtnHidden()
}
// More of your source code below...
It's weird, but when I add a UIPanGestureRecognizer to a view it does not work. It's my view, that white view is a subview of the red view:
Main View:
#IBOutlet weak var redView: UIView!
#IBOutlet weak var whiteView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let panRecognizer = UIPanGestureRecognizer(target:self, action:#selector(ViewController.handlePan))
whiteView.gestureRecognizers = [panRecognizer]
}
func handlePan(recognizer:UIPanGestureRecognizer) {
//foo
}
When I tap and drag the white view it won't move.
try this:
whiteView.isUserInteractionEnabled = true
From the Apple's docs:
If the code for your pan gesture recognizer is not called, check to see if the following conditions are true, and make corrections as needed:
The isUserInteractionEnabled property of the view is set to true. Image views and labels set this property to false by default.
The number of touches is between the values specified in the minimumNumberOfTouches and maximumNumberOfTouches properties.
For a UIScreenEdgePanGestureRecognizer object, the edges property is configured and touches start at the appropriate edge.
Handling Pan Gestures
Here is the answer:
class ViewController: UIViewController {
#IBOutlet weak var redView: UIView!
#IBOutlet weak var whiteView: UIView!
var lastLocation:CGPoint = CGPointMake(0, 0)
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let panRecognizer = UIPanGestureRecognizer(target:self, action:#selector(ViewController.handlePan))
whiteView.addGestureRecognizer(panRecognizer)
}
func handlePan(recognizer:UIPanGestureRecognizer) {
let translation = recognizer.translationInView(redView)
whiteView.center = CGPointMake(lastLocation.x + translation.x, lastLocation.y + translation.y)
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
// Promote the touched view
lastLocation = whiteView.center
}
}
If you are using swift language for method you can't use [].
var PanGesture = UIPanGestureRecognizer(target: self, action: "respondToPanGesture:")
whiteView.addGestureRecognizer(PanGesture)
Hope it helps.
I am wondering how to dismiss a key board if the user touches outside the UITextField. I am using Xcode 6.1. I added a UITextField to a UIViewController as per the below thru ViewDidLoad() function. Any help on dismissing the key board would be much appreciated.
class PickerdemoViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate{
var textBox1 : UITextField!
override func viewDidLoad() {
//..................adding text box.........................//
self.textBox1 = UITextField (frame: CGRectMake(100, 152.5, 50, 35))
textBox1.delegate = self
textBox1.backgroundColor = UIColor.whiteColor()
textBox1.placeholder = "enter"
textBox1.keyboardType = UIKeyboardType.DecimalPad
self.textBox1.resignFirstResponder()
textBox1.keyboardAppearance = UIKeyboardAppearance.Default
self.view.addSubview(textBox1)
super.viewDidLoad()
}
You need to have a reference to the UITextField so make a property value like this
class MyClass: UIViewController {
var textBox1: UITextField!
...
// create your textfield where ever you were by assigning it to self.textBox1
}
Then to dismiss the keyboard you resign its as the first responder.
self.textBox1.resignFirstResponder()
Update to dimiss keyboard
Dismissing on return/done with the textField delegate method
func textFieldShouldReturn(textField: UITextField) -> Bool {
self.textBox1.resignFirstResponder()
return true
}
Dismissing on a button click (custom IBAction method)
#IBAction func buttonClicked(sender: UIButton!) {
self.textBox1.resignFirstResponder()
}
This will dismiss the keyboard by tapping screen. Make sure to not put it in the viewDidLoad.
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { // this func lets you close keyboard by touching screen
self.view.endEditing(true) // this line lets you close keyboard by touching screen
}
How does one simply chain up a few textfields for a form?
I found an old Post for obj-C here and unsuccessfully tried to "swift it".
What I tried to do:
#IBOutlet weak var nameTextfield: UITextField!
#IBOutlet weak var emailTextfield: UITextField!
nameTextfield.addTarget(target: emailTextfield, action: becomeFirstResponder(), forControlEvents: UIControlEvents.EditingDidEndOnExit)
Do you have to target the textfield in an other way than by its IBOutlet?
add this function:
func textFieldShouldReturn(textField: UITextField!) -> Bool {
textField.resignFirstResponder()
return true
}
After return is hit on each textfield the keyboard will resign. You can add tags to your textfields and then add if/else statements for different behaviors depending on which textField.tag responded if you wish.
You do not have to target the textfield by anything other than the IBOutlet for this function.
Try out this code.
func textFieldShouldReturn(textField: UITextField) -> Bool
{
if (usernameTF.resignFirstResponder())
{
passwordTF.becomeFirstResponder()
}
textField.resignFirstResponder();
return true
}