I'm trying too make UIImage as button using UITapGesture.
let contactSegueIdentifier = "showContactSegue"
override func viewDidLoad() {
initTapGestureRec()
}
func initTapGestureRec() {
let tapGesture: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: Selector("recognizeTapGesture:"))
brandMenuContactImage.addGestureRecognizer(tapGesture)
}
func recognizeTapGesture(sender: UIGestureRecognizer) {
self.performSegueWithIdentifier(contactSegueIdentifier, sender: self)
}
When I run and tap the image, nothing happened. Can anyone help me please.
add userInteractionEnabled true on your image and try
brandMenuContactImage.userInteractionEnabled = true
objective-C
brandMenuContactImage.userInteractionEnabled = YES;
Update
override func viewDidLoad() {
brandMenuContactImage.userInteractionEnabled = true
initTapGestureRec()
}
Related
When I am tapping on UIView but Gesture is not working.
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))
viewForSHadow.isUserInteractionEnabled = true
viewForSHadow.addGestureRecognizer(tap)
// Do any additional setup after loading the view.
}
func handleTap(_sender: UITapGestureRecognizer) {
print("---------View Tapped--------")
viewForSHadow.isHidden = true
viewForAlert.isHidden = true
}
I just want to perform this action on UIView tap.
You may check in the debug view hierarchy if anything with alpha = 0 is overlapping your viewForSHadow.
You have to implement as follows:
class ViewController: UIViewController, UIGestureRecognizerDelegate {
...
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap(_sender:)))
viewForSHadow.isUserInteractionEnabled = true
viewForSHadow.addGestureRecognizer(tap)
}
#objc func handleTap(_sender: UITapGestureRecognizer) {
print("---------View Tapped--------")
viewForSHadow.isHidden = true
viewForAlert.isHidden = true
}
...
}
Your code is more than enough to have working UIGestureRecognizer, you should check some other stuff like, is there something else that can consume the user interaction. And also to check if you use
isUserInteractionEnabled = false
to some parent view of viewForSHadow.
You have to use UIGestureRecognizerDelegate
let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleDismiss))
tapRecognizer.delegate = self
blackView.addGestureRecognizer(tapRecognizer)
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
return true
}
#objc func handleDismiss() {
print("handleDismiss")
}
Reference
Don't forget to set the UIGestureRecognizerDelegate in your class
You need to mention numberOfTapsRequired property of the UITapGestureRecognizer.
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: #selector(handleTapGesture(_sender:)))
tap.numberOfTapsRequired = 1
viewForSHadow.isUserInteractionEnabled = true
viewForSHadow.addGestureRecognizer(tap)
}
#objc func handleTapGesture(_sender: UITapGestureRecognizer) {
print("---------View Tapped--------")
// Why are you hiding this view **viewForSHadow**
viewForSHadow.isHidden = true
viewForAlert.isHidden = true
}
Also, make sure you are not doing viewForSHadow.isUserInteractionEnabled = false anywhere in the code.
First of all you code doesn't compile. The handleTap(_:) signature must be like:
#objc func handleTap(_ sender: UITapGestureRecognizer) {
print("---------View Tapped--------")
}
Secondly, you need to first try with the minimal code in a separate project. And by minimal code I mean what you've added in the question.
class ViewController: UIViewController {
#IBOutlet weak var viewForSHadow: UIView!
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))
viewForSHadow.addGestureRecognizer(tap)
}
#objc func handleTap(_ sender: UITapGestureRecognizer) {
print("---------View Tapped--------")
}
}
Try with just the above code and see if you can get it working. The above code is working well at my end without any delegate or numberOfTaps.
I'm having problems trying to get a UI button to have multiple taps I know it's not ideal but if someone could show me what I'm doing wrong or point me in the right direction that would be great. Below is my current code where I'm trying to create a function called two pressed that responds based off how many times its tapped.
var resultOfLabel = ""
#IBOutlet weak var outputLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
let tapGesture1 = UITapGestureRecognizer(target: self, action: #selector(singleTap(gesture:)))
UIButton.addGestureRecognizer(tapGesture1)
let tapGesture2 = UITapGestureRecognizer(target: self, action: #selector(doubleTap(gesture:)))
tapGesture2.numberOfTapsRequired = 2
UIButton.addGestureRecognizer(tapGesture2)
let tapGesture3 = UITapGestureRecognizer(target: self, action: #selector(tripleTap(gesture:)))
tapGesture3.numberOfTapsRequired = 3
UIButton.addGestureRecognizer(tapGesture3)
let tapGesture4 = UITapGestureRecognizer(target: self, action: #selector(quadrupleTap(gesture:)))
tapGesture4.numberOfTapsRequired = 4
UIButton.addGestureRecognizer(tapGesture4)
// Do any additional setup after loading the view.
}
#IBAction func twoPressed(sender: UIButton) {
#objc func singleTap() {
print(“2”)
}
#objc func doubleTap() {
print(“a”)
}
#objc func tripleTap() {
print(“b”)
}
#objc func quadrupleTap() {
print(“c”)
}
resultOfLabel += "\(sender)"
outputLabel.text = resultOfLabel
}
There is no problem in that except get these 4 functions out of the IBAction method
let tapGesture1 = UITapGestureRecognizer(target: self, action: #selector(self.singleTap(_:)))
UIButton.addGestureRecognizer(tapGesture1)
//
#objc func singleTap(_ sender: UITapGestureRecognizer? = nil) {
print(“2”)
self.twoPressed(sender.View as! UIButton)
}
#objc func doubleTap() {
print(“a”)
}
#objc func tripleTap() {
print(“b”)
}
#objc func quadrupleTap() {
print(“c”)
}
#IBAction func twoPressed(sender: UIButton) {
resultOfLabel += "\(sender)"
outputLabel.text = resultOfLabel
}
Does UILabel have any value that can be set in order to make it selectable?
I have a label that I want to be selectable, (long press and a copy btn shows up) kinda like in Safari.
Self-contained Solution (Swift 5)
You can adapt the solution from #BJHSolutions and NSHipster to make the following self-contained SelectableLabel:
import UIKit
/// Label that allows selection with long-press gesture, e.g. for copy-paste.
class SelectableLabel: UILabel {
override func awakeFromNib() {
super.awakeFromNib()
isUserInteractionEnabled = true
addGestureRecognizer(
UILongPressGestureRecognizer(
target: self,
action: #selector(handleLongPress(_:))
)
)
}
override var canBecomeFirstResponder: Bool {
return true
}
override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
return action == #selector(copy(_:))
}
// MARK: - UIResponderStandardEditActions
override func copy(_ sender: Any?) {
UIPasteboard.general.string = text
}
// MARK: - Long-press Handler
#objc func handleLongPress(_ recognizer: UIGestureRecognizer) {
if recognizer.state == .began,
let recognizerView = recognizer.view,
let recognizerSuperview = recognizerView.superview {
recognizerView.becomeFirstResponder()
UIMenuController.shared.setTargetRect(recognizerView.frame, in: recognizerSuperview)
UIMenuController.shared.setMenuVisible(true, animated:true)
}
}
}
Yes, you need to implement a UIMenuController from a long press gesture applied to your UILabel. There is an excellent article about this on NSHipster, but the gist of the article is the following.
Create a subclass of UILabel and implement the following methods:
override func canBecomeFirstResponder() -> Bool {
return true
}
override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
return (action == "copy:")
}
// MARK: - UIResponderStandardEditActions
override func copy(sender: AnyObject?) {
UIPasteboard.generalPasteboard().string = text
}
Then in your view controller, you can add a long press gesture to your label:
let gestureRecognizer = UILongPressGestureRecognizer(target: self, action: "handleLongPressGesture:")
label.addGestureRecognizer(gestureRecognizer)
and handle the long press with this method:
func handleLongPressGesture(recognizer: UIGestureRecognizer) {
if let recognizerView = recognizer.view,
recognizerSuperView = recognizerView.superview
{
let menuController = UIMenuController.sharedMenuController()
menuController.setTargetRect(recognizerView.frame, inView: recognizerSuperView)
menuController.setMenuVisible(true, animated:true)
recognizerView.becomeFirstResponder()
}}
NOTE: This code is taken directly from the NSHipster article, I am just including it here for SO compliance.
UILabel inherits from UIView so you can just add a long press gesture recognizer to the label. Note that you have to change isUserInteractionEnabled to true, because it defaults to false for labels.
import UIKit
class ViewController: UIViewController {
let label = UILabel()
override func viewDidLoad() {
view.addSubview(label)
label.text = "hello"
label.translatesAutoresizingMaskIntoConstraints = false
label.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
label.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
let longPressGestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(longPressLabel(longPressGestureRecognizer:)))
label.addGestureRecognizer(longPressGestureRecognizer)
label.isUserInteractionEnabled = true
}
#objc private func longPressLabel (longPressGestureRecognizer: UILongPressGestureRecognizer) {
if longPressGestureRecognizer.state == .began {
print("long press began")
} else if longPressGestureRecognizer.state == .ended {
print("long press ended")
}
}
}
I've implemented a UILabel subclass that provides all of the functionality needed. Note that if you're using this with interface builder, you'll need to adjust the init methods.
/// A label that can be copied.
class CopyableLabel: UILabel
{
// MARK: - Initialisation
/// Creates a new label.
init()
{
super.init(frame: .zero)
let gestureRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPressGesture(_:)))
self.addGestureRecognizer(gestureRecognizer)
self.isUserInteractionEnabled = true
}
required init?(coder aDecoder: NSCoder)
{
fatalError("init(coder:) has not been implemented")
}
// MARK: - Responder chain
override var canBecomeFirstResponder: Bool
{
return true
}
// MARK: - Actions
/// Method called when a long press is triggered.
func handleLongPressGesture(_ gestuerRecognizer: UILongPressGestureRecognizer)
{
guard let superview = self.superview else { return }
let menuController = UIMenuController.shared
menuController.setTargetRect(self.frame, in: superview)
menuController.setMenuVisible(true, animated:true)
self.becomeFirstResponder()
}
override func copy(_ sender: Any?)
{
UIPasteboard.general.string = self.text
}
}
I am using this library for SearchText Field
https://github.com/apasccon/SearchTextField
Here is my Code :
override func viewDidLoad() {
super.viewDidLoad()
self.view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: Selector("dismissKeyboard")))
}
func dismissKeyboard()
{
ClientList.resignFirstResponder()
self.view.endEditing(true)
}
Dismiss of keyboard is working but the didSelectRowAtIndexPath is not getting called so i am not able to select anything
Image for Reference :
Partial Solution I Done:
func hideKeyboard(gestureRecognizer: UIGestureRecognizer) {
let point = gestureRecognizer.locationInView(ClientList.tableView)
let indexPath = ClientList.tableView!.indexPathForRowAtPoint(point)
if indexPath != nil {
return
}
if ClientList.becomeFirstResponder() {
ClientList.resignFirstResponder()
}
}
But now issue is i have other list too , how can i implement for other list ?
You can solve this issue like this
ViewDidLoad
self.tap = UITapGestureRecognizer(target: self, action: "viewTapped:")
self.tap.delegate = self
self.view.addGestureRecognizer(self.tap)
Function
func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
if touch.view != nil && touch.view!.isDescendantOfView(self.tableView) {
return false
}
return true
}
Who's the target of the gesture? I think it should be the list since it is what you tap and it is above the view
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "dismissKeyboard")
view.addGestureRecognizer(tap)
Add this to viewDidLoad
And add this function
func dismissKeyboard() {
//Causes the view (or one of its embedded text fields) to resign the first responder status.
view.endEditing(true)
}
I tried calling tabBarController!.tabBar.hidden = true in viewDidLoad() and it hides the TabBar. However, I tried to set tap gesture and hide the bar on Tap. The parent viewController that has ScrollView inside it with subview (that is connected with IBOutlet as myView)
override func viewDidLoad() {
super.viewDidLoad()
let tap = UITapGestureRecognizer(target: self, action: Selector("handleTap:"))
myView.addGestureRecognizer(tap)
}
func handleTap(sender: UITapGestureRecognizer? = nil) {
print("A") // logs successfully
if TabBarHidden == false {
print("B") // logs successfully
//I tried:
tabBarController?.tabBar.hidden = true
// I also tried
tabBarController?.tabBar.alpha = 0
tabBarController?.tabBar.frame.origin.x += 50
hidesBottomBarWhenPushed = true
} else {
...
TabBarHidden = false
}
}
hidden does work when I call it in viewDidLoad as I said, but not if I call in tap gesture function. What may be the problem? What am I missing?
this code totally works for me:
class ViewController: UIViewController {
var tabBarHidden: Bool = false {
didSet {
tabBarController?.tabBar.hidden = tabBarHidden
}
}
override func viewDidLoad() {
super.viewDidLoad()
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(tapGestureRecognized(_:)))
view.addGestureRecognizer(tapGestureRecognizer)
}
func tapGestureRecognized(sender: UITapGestureRecognizer) {
tabBarHidden = !tabBarHidden
}
}