I have read several posts here about same problem, but could not understood them mostly because I am quite new in IOS development and I use swift. Also I couldn't even found a definition for term "subclassing", maybe it is obj-c only?
Anyway, I have a tableview controller with static cells, and a textfield in one cell. I need to dismiss the keyboard when the user taps on a different area while editing the textfield. After reading posts here, I changed my touchesBegan content as following :
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.view.endEditing(true)
self.nextResponder()?.touchesBegan(touches, withEvent: event)
super.touchesBegan(touches, withEvent: event)
}
I still don't get the touches in tableviewcontroller which is defined as :
class addNew: UITableViewController, UITextFieldDelegate {
I had a similar issue on Swift 4 just to endEditing and hiding the keyboard with touchesBegan. I couldn't find a way around at first.
These two steps worked for me :
To add gesture recogniser to table view in :
override func viewDidLoad() {
super.viewDidLoad()
tableView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(hideKeyboard)))
}
Ending editing in two ways in
#objc func hideKeyboard() {
view.endEditing(true)
//textField.resignFirstResponder() /* This line also worked fine for me */
}
You can add a tapGestureRecognizer on top of you tableview.
Connect the tapGestureRecgonizer to a function/method.
Within that method, check if the textfield, is the firstresponder. If yes, then ask the textfield to resign first responder.
Related
I want to receive information about mouse move events during button click (mouse up)
I'm adding NSTrackingArea to view that I want to track mouse move and mouse dragged events on, but I still don't receive these events.
I assume that mouseDown in NSButton is blocking mouse events, so the only solution I come up with is overriding mouseDown function for NSButton and not calling super.mouseDown, but then I need to handle button selection manually and I'm not sure if this is right approach for this.
Is this a right solution for my problem? Will there be no problems? Is there a better solution?
Here is code for test, just add button to new project and assign TestButton class to it.
class TestButton: NSButton {
override func mouseDown(with event: NSEvent) {
print("Mouse up")
super.mouseDown(with: event) // After removing events works.
print("Mouse down")
}
}
class ViewController: NSViewController {
override func viewDidLoad() {
super.viewDidLoad()
let trackingArea = NSTrackingArea(rect: view.bounds, options: [.activeAlways, .mouseMoved, .enabledDuringMouseDrag], owner: self, userInfo: nil)
view.addTrackingArea(trackingArea)
}
override func mouseMoved(with event: NSEvent) {
print("Mouse moved")
super.mouseMoved(with: event)
}
override func mouseDragged(with event: NSEvent) {
print("Mouse dragged")
super.mouseDragged(with: event)
}
}
I had a similar requirement for my project. So initially, I started out with NSButton just like you. But, it turned out to be more hectic than I thought. Handling the action and selected state where the main concerns I faced. You could proceed with NSButton if it actually meets up with your requirement. But, I eventually moved to NSView and customised it. So, few of my implementation for handling move and drag event implementation I've open-sourced here is the link.
The traditional way to do this is to use a custom subclass of NSButtonCell and override continueTracking(last:current:in:) (inherited from NSCell). Your override should generally call through to super and return what it returns, but you can do something else in addition, to respond to the mouse movements. The issue is that NSCell and its subclasses have been "soft deprecated" for a while.
That said, it would be very surprising to me as a user that anything other than the button would react to the mouse movements while I'm interacting with the button (clicked in it and dragging).
I am making a mac app using Swift and this app has a custom view (a class extending NSView and overriding its draw method). Now, I want to disable all mouse clicks and mouse drags on this view and pass them on to the other applications running beneath my application.
I have tried the following ways (gleaned from Apple documentation and other SO questions) to disable clicks on my view and nothing worked for me so far:
1. Overriding hitTest inside my custom View class
override func hitTest(_ point: NSPoint) -> NSView? {
let view = super.hitTest(point)
return view == self ? nil : view
}
2. Overriding acceptsFirstMouse inside my custom View class
override func acceptsFirstMouse(for event: NSEvent?) -> Bool {
return false
}
3. Overriding mouseDown in ViewController as well as in my custom View class
override func mouseDown(with event: NSEvent) {
// do nothing
}
4. Overriding mouseDragged in ViewController as well as in my custom View class
override func mouseDragged(with event: NSEvent) {
// do nothing
}
Am I missing something?
This isn't handled at the view level, it's handled at the window level. You can set the ignoresMouseEvents property of the window to true.
The issue is that the Window Server will only dispatch an event to a single process. So, once it has arrived in your app, it's not going to another. And there's no feasible way for your app to forward it along, either.
Can a UIPanGestureRecognizer be added while the user is touching and immediately start recognizing the pan gesture? I can only get it to work if I lift up my finger, touch again and start dragging.
From another answer, I've tried to subclass UIPanGestureRecognizer and override the touch event:
import UIKit.UIGestureRecognizerSubclass
class InstantPanGestureRecognizer: UIPanGestureRecognizer {
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
if (self.state == UIGestureRecognizer.State.began) { return }
super.touchesBegan(touches, with: event)
self.state = UIGestureRecognizer.State.began
}
}
This doesn't solve my problem though, probably because they already had their UIPanGestureRecognizer added, and I want to add mine while the user is already touching the screen and have it work at that point.
I'm switching between adding swipe and pan gestures depending on where the user the is interacting on an image. The require(tofail:UIGestureRecognizer) function hasn't worked for me.
I have two textFields and a Done button in my VC but I'm having some problems with the ending of editing.
My textFieldDidEndEditing method is called when I tap on one textField after being inside the other one, or when I tap outside the textField (because I added a tap recognizer to the parent view) but not when I tap the Done button.
And, most important (especially when I run on an actual device), the keyboard won't disappear under any of these circumstances, even though my textFieldDidEndEditing method calls resignFirstResponder().
Why isn't the keyboard dismissing? Also, is there a way to have textFieldDidEndEditing get called when I tap outside the field just automatically (without having it come from the tap recognizer)? It just seems like this should be how it works, but if I'm wrong, I'm wrong.
Here's some pertinent parts of my code.
1.Trying to dismiss the keyboard. The first part of this method works, and the value is stored (when the method is called at all, that is). At no point does the cursor disappear from the textField, nor does the keyboard get dismissed.
func textFieldDidEndEditing(_ textField: UITextField) {
if let playerName = textField.text, let playerNum = nameFields.index(of: textField) {
playerNames[playerNum] = playerName
}
resignFirstResponder()
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textFieldDidEndEditing(textField)
return true
}
Also, here's a curious thing: when I set a breakpoint in textFieldDidEndEditing and debug, enter a value in one field and hit Done, it segues to the next scene, and then stops at textFieldDidEndEditing, which at this point has no effect (the values may be stored but they aren't reflected in the new scene).
2.Trying to add the tap recognizer to the done button. I don't have an outlet to the done button in my code, just out of laziness, so that's probably the best solution. But, I'm still interested in why this doesn't work. This is identical to the code that defines the tap recognizer that's working in the parent view.
func dismiss(_ sender:UITapGestureRecognizer) {
nameFields.forEach { textFieldDidEndEditing($0) }
}
override func viewDidAppear(_ animated: Bool) {
for view in view.subviews where view is UIButton {
let dismissTextField = UITapGestureRecognizer(target: self, action: #selector(dismiss(_:)))
dismissTextField.numberOfTapsRequired = 1
view.addGestureRecognizer(dismissTextField)
}
}
You need to call resignFirstResponder inside textFieldShouldReturn method instead of calling textFieldDidEndEditing.
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
Also in your TapGesture method simply call endEditing(_:) with your view instead of looping through the array of textFields.
func dismiss(_ sender:UITapGestureRecognizer) {
self.view.endEditing(true)
}
Swift 5: This solution below is much easier actually.
Simply subclass your ViewController with the text fields to UITextFieldDelegate like this:
class CreateGroupViewController: UIViewController, UITextFieldDelegate {
then if you named your UITextFields: nameTextField & occupationTextField then add the following delegations to your viewDidLoad() method:
self.nameTextField.delegate = self
self.occupationTextField.delegate = self
Then simply add the generic function to your file:
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
If you do it this way, then for every textField reference outlet you create, all of them will hide the keyboard after the user hits the return button no matter which textField he's typing. For each textField you add to your view, add another self.nextTextField.delegate = self line to your viewDidLoad.
Remember to test this with your iPhone/iDevice plugged into your developer computer bc XCode's simulator doesn't bring up the keyboard (bc you're normally testing using a full keyboard). Or if you've set up your testing hardware (iPhone) via WiFi you can do it that way also. Otherwise, your users will be "testing" this on TestFlight.
How to remove focus on NSTextField if I'm not focus in the textField?
I have a NSTextField and I set the Action: Sent On End Editing. After clicking the textField, the FOCUS will always in my NSTextField when I click other places on the view.
Furthermore, I use makeFirstResponder and resignFirstResponder but all in vain. Any idea?
#IBAction func endOfEditing(sender: NSTextField) {
view.window?.makeFirstResponder(nil)
view.window?.resignFirstResponder()
}
For illustration, the FOCUS will always be in textField no matter where I pressed. (Even when I pressed the button)
How can I remove the focus when I click outside the textField?
Just try this: change "view.window?" to "sender"
#IBAction func endOfEditing(sender: NSTextField) {
sender.makeFirstResponder(nil)
sender.resignFirstResponder()
}
Swift 4
For those still troubling with focus and unfocus: I don't know if it was the case back in 2016, but in Swift 4 my NSTextField loses focus except if I click in another "selectable" outlet.
For instance if I click on a NSButton right after NSTextField it won't lost focus. I suspect the NSButton catches the event, preventing the textfield to know it has to unfocus.
Here is a much radical solution which will definitely defocus an NSTextField
#IBAction func clickMyButton(_ sender: NSButton) { // or anywhere else
self.quantityTextField.isEnabled = false
self.quantityTextField.isEnabled = true
}
Not very sexy but it is reliable
Edit: Just saw it, it solves #Lee's issue
try add this function to your viewController
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
// I assume your textField call myText
myText. resignFirstResponder()
}