I have created a custom annotation view, as described here: https://sweettutos.com/2016/03/16/how-to-completely-customise-your-map-annotations-callout-views/
It works fine and displays the correct data/info.
The problem seems to be that there is no respons to .touchUpInside from the added button.
let button = UIButton()
button.addTarget(self, action: #selector(ViewController.deleteFromAnnot(sender: )), for: .touchUpInside)
button.frame = CGRect.init(x: 16, y: 543, width: 268, height: 30)
button.backgroundColor = .yellow
calloutView.addSubview(button)
#objc func deleteFromAnnot(sender: UIButton)
{
print("Do something")
}
It looks to me like you have set your button target incorrectly.
Replace
button.addTarget(self, action: #selector(ViewController.deleteFromAnnot(sender: )), for: .touchUpInside)
With
button.addTarget(self, action: #selector(deleteFromAnnot(sender: )), for: .touchUpInside)
Related
Xcode did not report errors but nothing was printed when I pressed the button.
I tried it with action:
#selector (print), action: #selector (self.print), action: #selector (ViewController.print)..etc..
Swift 4, Xcode 10.1
class SomeViewController:UIViewController {
var button:UIButton = UIButton()
func setupButton()
{
button = UIButton(frame: CGRect(x: 140, y: 140, width: 90, height: 40))
button.addTarget(self, action: #selector(print(-:)) , for: .touchUpOutside)
navigationController?.navigationBar.addSubview(button)
button.setTitle("Convert", for: .normal)
button.backgroundColor = .yellow
view.addSubview(button)
}
#objc func print(_sender: UIButton)
{
print("Stackoverflow")
}
override func viewDidLoad()
{
super.viewDidLoad()
view.addSubview(CollectionView)
CollectionView.frame = view.frame
setupButton()
}
}
You just have to change event type from .touchUpOutside to .touchUpInside
Here is events documentation
Change this ( You need touchUpInside instead of touchUpOutside )
button.addTarget(self, action: #selector(print(_:)) , for: .touchUpOutside)
to
button.addTarget(self, action: #selector(printRes) , for: .touchUpInside)
#objc func printRes(_ sender: UIButton) { }
Also don't use print as button action name because it's a reserved method
Also to get the button click action set it's type
button = UIButton(type: .system)
button.frame = CGRect(x: 140, y: 140, width: 90, height: 40)
I got the problem when i use Custom Bar button with image and title, I use below code
let button = UIButton(type: .system)
button.titleEdgeInsets.left = 5
button.setImage(buttonImg, for: .normal)
button.setTitle(title, for: .normal)
button.sizeToFit()
button.addTarget(self, action: #selector(self.popVC), for: .touchUpInside)
navigationItem.leftBarButtonItem = UIBarButtonItem(customView: button)
And Here is the problem snippet. Text not show clearly
Try this:
let backButton = UIButton(type: .system)
backButton.frame = CGRect(x: 0, y: 0, width: 500, height: 30)
backButton.setImage(buttonImg, for: .normal)
backButton.setTitle(title, for: .normal)
backButton.addTarget(self, action: #selector(self.popVC(_:)), for: .touchUpInside)
backButton.sizeToFit()
let backBarButton = UIBarButtonItem(customView: backButton)
self.navigationItem.leftBarButtonItem = backBarButton
I am doing a project and I want to add 6 buttons on the webview , but whenever I am trying to add a button, the app doesnot show this button.
Any suggestion, help really appreciated!
Thanks
Try This-
let button = UIButton(frame: CGRect(x: 0, y: 0, width: 44, height: 44))
button.backgroundColor = UIColor.redColor()
button.addTarget(self, action: #selector(ratingButtonTapped), forControlEvents: .TouchUpInside)
self.profileVIew.addSubview(button)
func ratingButtonTapped(){
print("Button pressed")
}
I'm going to show you how to do this in code without using storyboards. Put his in your view controller class
var setupButton: UIButton = {
let button = UIButton(type: .system)
button.backgroundColor = UIColor(r: 80, g: 101, b: 161, a: 256)
button.setTitle("Register", for: .normal)
button.setTitleColor(UIColor.white, for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 18)
button.addTarget(self, action: #selector(handleRegister), for: .touchUpInside)
return button
}()
then in your viewDidLoad() function put
view.addSubview(setupButton)
myButton()
then outside of viewDidLoad() put
func myButton() {
setupButton.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
setupButton.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
setupButton.widthAnchor.constraint(equalTo: view.widthAnchor, constant: -24).isActive = true
setupButton.heightAnchor.constraint(equalToConstant: 150).isActive = true }
func handleRegister {
#your action here
}
I create a UIButton in tvOS via Swift
let randomBtn = UIButton()
randomBtn.setTitle("Zufällig", forState: .Normal)
let RndNormal = UIImage(named: "RndNormal")
let RndHoover = UIImage(named: "RndHoover")
randomBtn.setImage(RndNormal, forState: .Normal)
randomBtn.setImage(RndHoover, forState: .Focused)
randomBtn.setTitleColor(UIColor.blackColor(), forState: .Normal)
randomBtn.setTitleColor(UIColor.whiteColor(), forState: .Focused)
randomBtn.addTarget(self, action: #selector(ViewController.click(_:)), forControlEvents: UIControlEvents.TouchUpInside)
let screenSize: CGRect = UIScreen.mainScreen().bounds
let screenWidth = screenSize.width
randomBtn.frame = CGRect(x: screenWidth - 150, y: 60 , width: 70 , height: 70)
self.view.addSubview(randomBtn)
But the action never get fired if I press the button, is there anything different in tvOS?
func click(sender: UIButton) {
print("click")
}
In tvOS for Button action UIControlEvents TouchUpInside will not call.
You have to use UIControlEvents PrimaryActionTriggered like below.
randomBtn.addTarget(self, action: #selector(ViewController.click(_:)), forControlEvents: UIControlEvents. PrimaryActionTriggered)
Also Refer this link if you have any confusion
https://forums.developer.apple.com/thread/17925
randomBtn.addTarget(self, action: #selector(ViewController.click(_:)), forControlEvents: UIControlEvents.PrimaryActionTriggered)
Solved it, its just a other UIControlEvents
I am trying to build UIViews programmatically. How do I get a UIButton with an action function in Swift?
The following code does not get any action:
let btn: UIButton = UIButton(frame: CGRectMake(100, 400, 100, 50))
btn.backgroundColor = UIColor.greenColor()
btn.setTitle("Click Me", forState: UIControlState.Normal)
btn.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(buttonPuzzle)
The following selector function is:
func buttonAction(sender: UIButton!) {
var btnsendtag: UIButton = sender
}
You're just missing which UIButton this is. To compensate for this, change its tag property.
Here is you answer:
let btn: UIButton = UIButton(frame: CGRectMake(100, 400, 100, 50))
btn.backgroundColor = UIColor.greenColor()
btn.setTitle("Click Me", forState: UIControlState.Normal)
btn.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
btn.tag = 1 // change tag property
self.view.addSubview(btn) // add to view as subview
Swift 3.0
let btn: UIButton = UIButton(frame: CGRect(x: 100, y: 400, width: 100, height: 50))
btn.backgroundColor = UIColor.green
btn.setTitle(title: "Click Me", for: .normal)
btn.addTarget(self, action: #selector(buttonAction), forControlEvents: .touchUpInside)
btn.tag = 1
self.view.addSubview(btn)
Here is an example selector function:
func buttonAction(sender: UIButton!) {
var btnsendtag: UIButton = sender
if btnsendtag.tag == 1 {
//do anything here
}
}
Using a tag is a fragile solution. You have a view and you are creating and adding the button to that view, you just need to keep a reference to it: For example
In your class, keep a reference to the button
var customButton: UIButton!
Create the button and set the reference
let btn = UIButton(frame: CGRect(x: 100, y: 400, width: 100, height: 50))
btn.backgroundColor = .greenColor()
btn.setTitle("Click Me", forState: .Normal)
btn.addTarget(self, action: #selector(MyClass.buttonAction), forControlEvents: .TouchUpInside)
self.view.addSubview(btn)
customButton = btn
Test against this instance in the action function
func buttonAction(sender: UIButton!) {
guard sender == customButton else { return }
// Do anything you actually want to do here
}
You have to addSubview and tag on that btn.