I want to drag textField around my view. but im having small problem with my code.
here my code
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
var touch : UITouch! = touches.first as! UITouch
location = touch.locationInView(self.view)
bottomTextField.center = location
}
override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
var touch : UITouch! = touches.first as! UITouch
location = touch.locationInView(self.view)
bottomTextField.center = location
}
Problem is if i tried to touch on the TextField and drag then it doesn't work. but if i just touch somewhere else and drag my finger then TextField start to drag. i want t make it only if i touch on that textFiel.
You can achieve this by adding a gesture to the text field:
override func viewDidLoad() {
super.viewDidLoad()
var gesture = UIPanGestureRecognizer(target: self, action: Selector("userDragged:"))
bottomTextField.addGestureRecognizer(gesture)
bottomTextField.userInteractionEnabled = true
}
func userDragged(gesture: UIPanGestureRecognizer){
var loc = gesture.locationInView(self.view)
self.bottomTextField.center = loc
}
If it helps anyone, following is an updated working version of the accepted answer for swift 4.0 and 5.0
override func viewDidLoad() {
super.viewDidLoad()
//Draggable textfields
let gesture = UIPanGestureRecognizer(target: self, action: #selector(userDragged(gesture:)))
bottomTextView.addGestureRecognizer(gesture)
bottomTextView.isUserInteractionEnabled = true
}
#objc func userDragged(gesture: UIPanGestureRecognizer){
let loc = gesture.location(in: self.view)
self.bottomTextView.center = loc
}
Related
I am trying to determine the location of a touch on a PDFView. I have set my pdf view to be user interacted as follows:
pdfView?.isUserInteractionEnabled = true
I then use the following function to detect touches:
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if let touch = touches.first {
let position = touch.location(in: pdfView)
print(position)
}
}
The touchesBegan code is never fired.
Add gesture recognizer to PDFView like below:
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(didTap(_:)))
tapGesture.numberOfTapsRequired = 1
if var recognizer = pdfView.gestureRecognizers {
recognizer.append(tapGesture)
pdfView.gestureRecognizers = recognizer
}
I'm trying to get the (x,y) location of where a button is tapped. I've found answers but they don't work for Swift 2.3.
Any suggestions?
That's what I have tried:
#IBAction func buttonTapped(sender: AnyObject, forEvent event: UIEvent) {
let buttonView = sender as! UIView;
// get any touch on the buttonView
if let touch = event.touchesForView(buttonView) as? UITouch{
// print the touch location on the button
print(touch.locationInView(buttonView))
}
}
Swift 2:
#IBAction func buttonPressed(button: UIButton, forEvent event: UIEvent) {
guard let touch = event.allTouches()?.first else { return }
let point = touch.locationInView(button)
print ("point: \(point)")
}
Swift 3:
#IBAction func buttonPressed(_ button: UIButton, forEvent event: UIEvent) {
guard let touch = event.allTouches?.first else { return }
let point = touch.location(in: button)
print ("point: \(point)")
}
To create an IBAction with event pick the right option in this popup in your storyboard:
func addGesture() {
let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewController.buttonTapped(sender:)));
gestureRecognizer.numberOfTapsRequired = 1;
gestureRecognizer.numberOfTouchesRequired = 1;
button.addGestureRecognizer(gestureRecognizer) }
func buttonTapped(sender:UIGestureRecognizer) {
print(sender.location(in: button))
}
You can add Gesture recognizer to UIButton and it will work as well
override func touchesBegan(touches: NSSet!, withEvent event: UIEvent!) {
let touch = touches.allObjects[0] as UITouch
let touchLocation = touch.locationInView(self.view)
}
Hope this will be useful
I'm trying to create a simple function, similar to the touchesBegan, that detects if there's any touch occurring on the screen.
I've hit a brick wall trying it out myself because I'm not comfortable with UITouch class, but I really need some self made function, outside the touchesBegan default one.
I was trying to do something like this 'pseudo-code/swift'
func isTouchingTheScreen() -> Bool {
let someTouchHandleConstant: uitouch ???
if imTouchingTheScreen {
return true
} else {
return false
}
}
Do you have any hints?
PS: I know that code doesn't work, don't call that out, it was just to give you some 'image' of what I was trying to do (:
The idea
You can simply keep track of every touch begun, ended or cancelled by the user.
class GameScene: SKScene {
private var activeTouches = Set<UITouch>()
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
activeTouches.unionInPlace(touches)
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
activeTouches.subtractInPlace(touches)
}
override func touchesCancelled(touches: Set<UITouch>?, withEvent event: UIEvent?) {
if let touches = touches {
activeTouches.subtractInPlace(touches)
}
}
var isTouchingTheScreen: Bool { return !activeTouches.isEmpty }
}
Keeping activeTouches updated
As you can see I am keeping updated the activeTouches Set.
Every time a touch does begin I add it to activeTouches. And every time a touch does end or is cancelled I remove it from activeTouches.
The isTouchingTheScreen computed variable
This allows me to define the isTouchingTheScreen computed property that simply returns true when the Set contains some element.
You can implement UITapGestureRecognizer as below:
var tapGesture :UITapGestureRecognizer!
override func didMoveToNode() {
// Add UITapGestureRecognizer to view
self.tapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.touchedView(_:)))
view.addGestureRecognizer(tapGesture)
}
func touchedView(sender: UITapGestureRecognizer) {
print("view touched")
}
You could implement UITapGestureRecognizer:
// global var
var tapGesture :UITapGestureRecognizer!
override func didMoveToView() {
// Add tap gesture recognizer to view
self.tapGesture = UITapGestureRecognizer(target: self, action: #selector(GameScene.handleTap(_:)))
self.tapGesture.cancelsTouchesInView = false
view.addGestureRecognizer(tapGesture)
}
func handleTap(sender: UITapGestureRecognizer) {
print("GameScene tap")
if sender.state == .Ended {
var positionInScene: CGPoint = sender.locationInView(sender.view)
positionInScene = self.scene!.convertPointFromView(positionInScene)
let touchedNode = self.nodeAtPoint(positionInScene)
if touchedNode.name != "myHero" {
print("The SKSpriteNode myHero was tapped")
}
}
}
You can find more details in Apple docs here.
When I die in my game, I want to ignore all touch events by the user EXCEPT if the user taps inside of or on the reset game button. Here is my code.
for touch in touches{
let location = touch.locationInNode(self)
if died == true{
Ball.physicsBody?.velocity = CGVectorMake(0, 0)
if resetGame.containsPoint(location){
restartScene()
runAction(SKAction.playSoundFileNamed("Woosh.wav", waitForCompletion: false))
}
else {
self.userInteractionEnabled = false
}
This is all inside of my touchesBegan. This was my attempt at ignoring the user's touch unless the location of the touch was within the size of button. How can I ignore a user's touches everywhere on the screen except the button? resetGame is an SKSpriteNode image.
There are two solutions to your issue.
The first case I want to propose to you is based to gesture recognizer.
You can separate the button from the other touches events and switch on/off the touches event by a boolean var like this:
Gesture recognizers:
In the global var declaration section of your class:
var tapGesture :UITapGestureRecognizer!
var enableTouches:Bool = true
override func didMoveToView(view: SKView) {
super.didMoveToView(view)
self.tapGesture = UITapGestureRecognizer(target: self, action: #selector(GameClass.simpleTap(_:)))
self.tapGesture.cancelsTouchesInView = false
view.addGestureRecognizer(tapGesture)
myBtn.name = "myBtn"
}
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
return self.enableTouches
}
func simpleTap(sender: UITapGestureRecognizer) {
print("simple tap")
if sender.state == .Ended {
var touchLocation: CGPoint = sender.locationInView(sender.view)
touchLocation = self.convertPointFromView(touchLocation)
let touchedNode = self.nodeAtPoint(touchLocation)
// do your stuff
if touchedNode.name == "myBtn" {
// button pressed, do your stuff
}
}
}
override func update(currentTime: CFTimeInterval) {
/* Called before each frame is rendered */
if died == true {
self.enableTouches = false // disable all touches but leave gestures enabled
//do whatever you want when hero is died
}
}
Only a Boolean
The second solution I want to propose is simply to stopping touches flow by using a simple boolean (it's not very elegant but it works).
This method look when button is tapped and the update method check if your hero is dead so all touches will be disabled:
In the global var declaration section of your class:
var enableTouches:Bool = true
override func didMoveToView(view: SKView) {
super.didMoveToView(view)
myBtn.name = "myBtn"
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
if (!enableTouches) {
return
}
let touch = touches.first
let positionInScene = touch!.locationInNode(self)
let touchedNode = self.nodeAtPoint(positionInScene)
// do your stuff
if touchedNode.name == "myBtn" {
// button pressed, do your stuff
if died == true {
self.enableTouches = false // disable all touches
//do whatever you want when hero is died
}
}
}
override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
if (!enableTouches) {
return
}
let touch = touches.first
let positionInScene = touch!.locationInNode(self)
let touchedNode = self.nodeAtPoint(positionInScene)
// do your stuff
}
override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
if (!enableTouches) {
return
}
}
The first case permit to you to have always the gesture enabled so you can do also other stuff with gestures when your hero will be died. The second case stop your touches when you press your button and do the "die flow". Choose which may be the most suitable for you.
I'm trying to get the coordinates of a touch on the screen, To show a popup menu
how to use in page view controller
What am I doing wrong here?
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
if let touch = touches.first {
let position = touch.locationInView(view)
print(position)
}
}
In PageViewController,if you want to get pop up
In viewDidLoad:
let tap = UITapGestureRecognizer(target: self, action: "showMoreActions:")
tap.numberOfTapsRequired = 1
view.addGestureRecognizer(tap)
Make the page view controller inherit UIGestureRecognizerDelegate then add:
func showMoreActions(touch: UITapGestureRecognizer) {
let touchPoint = touch.locationInView(self.view)
let DynamicView = UIView(frame: CGRectMake(touchPoint.x, touchPoint.y, 100, 100))
DynamicView.backgroundColor=UIColor.greenColor()
DynamicView.layer.cornerRadius=25
DynamicView.layer.borderWidth=2
self.view.addSubview(DynamicView)
}
UIPageViewController with TouchEvent
Swift 5:
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: #selector(touchedScreen(touch:)))
view.addGestureRecognizer(tap)
}
#objc func touchedScreen(touch: UITapGestureRecognizer) {
let touchPoint = touch.location(in: self.view)
print(touchPoint)
}