I placed a UIControl in a UIView,and set the UIView as the UITextField.rightView,but the UIControl then doesnot call actions for controlEvents I added like:[control addTarget:self action:#selector(searchButtonClicked) forControlEvents:UIControlEventTouchUpInside].If I change the UIControl to a UIButton, it works well, but I has to use UIControl for some reason.Any one know the reason and solution?
I'm using xcode 14.0 on iOS 16.1
import UIKit
class DemoControl: UIControl { }
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(searchBar)
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
let searchView = UIView(frame: CGRect(x: 0, y: 0, width: demoControl.frame.width, height: demoControl.frame.height))
searchView.addSubview(demoControl)
searchBar.searchTextField.rightViewMode = .always
searchBar.searchTextField.rightView = searchView
}
private lazy var searchBar: UISearchBar = {
let view = UISearchBar(frame: CGRect(x: 0, y: 100, width: UIScreen.main.bounds.width - 24, height: 36))
return view
}()
private lazy var demoControl: DemoControl = {
let control = DemoControl(frame: CGRect(x: 0, y: 0, width: 52, height: 24))
control.layer.cornerRadius = 12
control.backgroundColor = .red
control.addTarget(self, action: #selector(controlAction), for: .touchUpInside)
return control
}()
private lazy var demoButton: UIButton = {
let control = UIButton(frame: CGRect(x: 0, y: 0, width: 52, height: 24))
control.layer.cornerRadius = 12
control.backgroundColor = .red
control.addTarget(self, action: #selector(controlAction), for: .touchUpInside)
return control
}()
#objc private func controlAction() {
print("Click!!!")
}
}
Related
I'm trying to create a welcome onboarding for the first time users but none of the views are loafing in the simulator, all I'm getting is a red background when the onboardingVC gets presented. Can anyone see the issue as to why the titles, buttons, and images won't appear?
This is the message I'm getting in the console:
Warning: Attempt to present <EMA.WalkthroughVC: 0x7faa2401e5b0> on <EMA.HomeVC: 0x7faa22407e00> whose view is not in the window hierarchy!
FOUND ALL!!
let holderView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = true
view.backgroundColor = .darkGray
return view
}()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.white
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
view.backgroundColor = UIColor.red
configure()
}
private func configure() {
let scrollView = UIScrollView(frame: holderView.bounds)
holderView.addSubview(scrollView)
let titles = ["Hi","Welcome","real nigga"]
for x in 0..<3 {
let pageView = UIView(frame: CGRect(x: CGFloat(x) * holderView.frame.size.width, y: 0, width: holderView.frame.size.width, height: holderView.frame.size.height))
scrollView.addSubview(pageView)
let label = UILabel(frame: CGRect(x: 10, y: 10, width: pageView.frame.size.width-20, height: 120))
let imageView = UIImageView(frame: CGRect(x: 10, y: 10+120+10, width: pageView.frame.size.width-20, height: pageView.frame.size.height - 60 - 130 - 15))
let button = UIButton(frame: CGRect(x: 10, y: pageView.frame.size.height - 60, width: pageView.frame.size.width-20, height: 50))
label.textAlignment = .center
label.font = UIFont.systemFont(ofSize: 16, weight: .semibold)
pageView.addSubview(label)
label.text = titles[x]
imageView.contentMode = .scaleAspectFill
imageView.image = UIImage(named: "BankCard\(x)")
pageView.addSubview(imageView)
button.setTitleColor(.red, for: .normal)
button.backgroundColor = .black
button.setTitle("Continue", for: .normal)
if x == 2 {
button.setTitle("Get Started", for: .normal)
}
button.addTarget(self, action: #selector(didTapButton), for: .touchUpInside)
pageView.addSubview(button)
}
}
#objc func didTapButton(_ button: UIButton) {
}
}
"whose view is not in the window hierarchy"
you didn't add the views that you created to the main view try to add the subviews to the main by using this one
self.view.addSubview(holderView)
also don't forget to add the frame for the holder view like that
UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height))
view.translatesAutoresizingMaskIntoConstraints = true
and inside the view did load
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.white
self.view.addSubview(holderView)
}
I'v added two UIViewControllers inside of a UIScrollView, and now I'm trying to add targets to the button inside of the UIViewControllers, I've checked the internet but none of those solutions worked for me, this is what I'm doing
inside of the main ViewController
scrollView.contentSize = CGSize(width: view.frame.width * 2, height:0)
let postsViewController = PostsViewController()
postsViewController.scrollView = scrollView
postsViewController.view.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height)
let chatsViewController = ChatsViewController()
chatsViewController.scrollView = scrollView
chatsViewController.view.frame = CGRect(x: view.frame.width, y: 0, width: view.frame.width, height: view.frame.height)
scrollView.addSubview(postsViewController.view)
scrollView.addSubview(chatsViewController.view)
postsViewController.didMove(toParent: self)
chatsViewController.didMove(toParent: self)
then inside the postsViewController I'm doing this
let a = UIButton()
a.setImage(currentTheme.chat, for: .normal)
a.imageEdgeInsets = UIEdgeInsets(top: 1.5, left: 0.0, bottom: 1.5, right: 0.0)
view.addSubview(a)
view.addConstraint("V:|-200-[v0(80)]-0-|",a)
view.addConstraint("H:|-200-[v0(80)]-0-|",a)
a.addTarget(self, action: #selector(abc), for: .touchUpInside)
the add "addConstraint" is an extension function just to add constraint to views
the abc function
#objc func abc() {
print("hello")
}
you can see the scrollView setting here
https://ibb.co/ZB1LJsy
Try to initialize your button like this
let a : UIButton = UIButton(type: .custom)
And add this after to the initialize of your UIScrollView
scrollView.delaysContentTouches = false
I tested in an xcode project. I can not execute the function (button) in the other UIViewController.
By cons if you sent the #selector it works.
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let scrollView : UIScrollView = UIScrollView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.width))
scrollView.delaysContentTouches = false
view.addSubview(scrollView)
let TestViewController = TestViewController1()
TestViewController.select = #selector(demande(sender:))
TestViewController.view.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height)
scrollView.addSubview(TestViewController.view)
print("dd")
}
#objc func demande(sender: UIButton!) {
print("button click", sender.tag)
}
}
class TestViewController1: UIViewController {
var select : Selector!
override func viewDidLoad() {
super.viewDidLoad()
let button : UIButton = UIButton(type: .custom)
button.setImage(#imageLiteral(resourceName: "turn_off_on_power-512"), for: .normal)
button.tag = 2
button.addTarget(self, action: select, for: .touchUpInside)
button.frame = CGRect(x: 0, y: 0, width: 200, height: 200)
view.addSubview(button)
}
}
Hoping that it helps you
okay, I solved my problem, the reason why the button wasn't getting trigger is because I forgot to attach the viewController of the view to the scrollview, so all I had to do is to attach the viewController as well and it worked.
self.addChild(postsViewController)
self.addChild(chatsViewController)
now it is working.
I am trying to make a playground and I have a button that says "Let's play!" and moves into a new view controller.
I looked at the code from this website and put it into my code:
http://lab.dejaworks.com/ios-swift-3-playground-uibutton-action/
This is all of my code (like, all of it):
import UIKit
import PlaygroundSupport
class MyViewController : UIViewController {
override func loadView() {
//Introduction
let view = UIView()
view.backgroundColor = .red
//title
func labelCool() {
let label = UILabel()
label.frame = CGRect(x: 50, y: 300, width: 400, height: 100)
label.text = "Add-Add - A Wonderful Game!"
//label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
label.numberOfLines = 3
label.font = UIFont(name: "HelveticaNeue-Bold", size: 30)
UILabel.animate (withDuration: 10.0, animations:{
label.textColor = .black
})
UILabel.animate(withDuration: 5.0, animations:{
label.textColor = .blue
})
view.addSubview(label)
}
labelCool()
//subtitle
let subtitle = UILabel()
subtitle.frame = CGRect(x: 50, y: 400, width: 200, height: 50)
subtitle.text = "Curated and Created by Yours Truly, Adit Dayal!"
subtitle.numberOfLines = 4
self.view = view
view.addSubview(subtitle)
}
override func viewDidLoad() {
class Responder : NSObject {
#objc func action() {
print("Yay!")
}
}
let responder = Responder()
//next page
let button = UIButton(frame : CGRect(x: 0, y: 500, width: 200, height: 50))
button.setTitle("Let's Play!", for: .normal)
button.backgroundColor = .blue
button.addTarget(responder, action: #selector(Responder.action), for: .touchUpInside)
view.addSubview(button)
}
}
class gameViewController: UIViewController {
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()
For now, I just want the button to display "Yay!" when clicked, but it is doing nothing!
Does anyone know why? (I'm on a bit of a time constraint)
Thank you so much,
Adit Dayal
Your Responder class is inside the viewDidLoad() function put the class outside like so
class Responder : NSObject {
#objc func action() {
print("Yay!")
}
}
override func viewDidLoad() {
let responder = Responder()
//next page
let button = UIButton(frame : CGRect(x: 0, y: 500, width: 200, height: 50))
button.setTitle("Let's Play!", for: .normal)
button.backgroundColor = .blue
button.addTarget(responder, action: #selector(responder.action), for: .touchUpInside)
view.addSubview(button)
}
The problem is that you are creating the responder object inside the viewDidLoad, as a local variable; this cause the object to be destroyed when the function ends (but we want that object alive even after). You have to retain that object, so instead of creating a local variable, create an instance variable by simply saving it as a class scope:
class Responder : NSObject {
#objc func action() {
print("Yay!")
}
}
let responder = Responder() // this is now outside the viewDidLoad, so it's an instance variable
override func viewDidLoad() {
//next page
let button = UIButton(frame : CGRect(x: 0, y: 500, width: 200, height: 50))
button.setTitle("Let's Play!", for: .normal)
button.backgroundColor = .blue
button.addTarget(responder, action: #selector(Responder.action), for: .touchUpInside)
view.addSubview(button)
}
I want the height of custom inputView of the textView to be same height as that of default keyboard. I tried a lot, including:
self.textView.inputView?.autoresizingMask = .flexibleHeight
I couldn't find a solution. It's always coming less than that of default keyboard. (EDIT: This issue exists only for iPhone X)
My code:
class ViewController: UIViewController {
let textView = UITextView()
let button = UIButton()
var keyboardView = UIView()
override func viewDidLoad() {
super.viewDidLoad()
button.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
textView.backgroundColor = .lightGray
button.backgroundColor = .red
self.view.addSubview(textView)
self.view.addSubview(button)
}
#objc func buttonAction() {
if self.textView.inputView == nil {
self.textView.inputView = keyboardView
self.textView.inputView?.autoresizingMask = .flexibleHeight
self.textView.reloadInputViews()
} else {
self.textView.inputView = nil
self.textView.reloadInputViews()
}
}
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
textView.frame = CGRect(x: 0, y: 50, width: self.view.frame.size.width - 50, height: 50)
button.frame = CGRect(x: self.view.frame.size.width - 50, y: 50, width: 50, height: 50)
}
}
I have a UIView with a UIButton inside it but the button does not recognise gestures
Any ideas why? I have tried using the solutions in the questions related to this but have not succeeded.
The whole class code:
import UIKit
import Foundation
public class HUDView: UIView , UIGestureRecognizerDelegate {
var stopwatch: StopwatchView
var gamePoints: CounterLabelView
var hintButton: UIButton!
required public init(coder aDecoder: NSCoder) {
fatalError("Never call this... Use init(frame:)")
}
override init(frame: CGRect) {
self.stopwatch = StopwatchView(frame: CGRect(x: ScreenWidth/2 - 150, y: 0, width: 300, height: 100))
self.stopwatch.setSecondsRemaining(0)
self.gamePoints = CounterLabelView(font: FontHUD!, frame: CGRect(x: ScreenWidth - 200, y: 30, width: 320, height: 70))
gamePoints.textColor = UIColor.black
gamePoints.value = 0
super.init(frame: frame)
self.addSubview(gamePoints)
let pointsLabel = UILabel(frame: CGRect(x: ScreenWidth - 340, y: 30, width: 140, height: 70))
pointsLabel.backgroundColor = UIColor.clear
pointsLabel.font = FontHUD
pointsLabel.text = " Points:"
self.addSubview(pointsLabel)
self.isUserInteractionEnabled = false
self.addSubview(self.stopwatch)
//load the button image
let hintButtonImage = UIImage(named: "btn")!
//the help button
self.hintButton = UIButton()
// hintButton.perform(#selector(HUDView.s))
hintButton.setTitle("Hint!", for:.normal)
hintButton.titleLabel?.font = lHud
hintButton.setBackgroundImage(hintButtonImage, for: .normal)
hintButton.frame = CGRect(x: 50, y: 30, width: hintButtonImage.size.width, height: hintButtonImage.size.height)
// hintButton.center = self.center
//50, 30, hintButtonImage.size.width, hintButtonImage.size.height
hintButton.alpha = 1.0
hintButton.isUserInteractionEnabled = true
self.addSubview(hintButton)
// hintButton.addTarget(self, action: #selector(self.tapButton(_:)), for: .touchUpInside)
let g = UITapGestureRecognizer(target: self, action: #selector(self.h(_:)))
g.delegate = self
hintButton.addGestureRecognizer(g)
}
func h(_ sender: UITapGestureRecognizer) {
print("hey!")
fatalError()
}
}
The problem is in line self.isUserInteractionEnabled = false
You are adding button as a subview to HUDView. The button tap will not work because the parent view ie:HUDView has user interaction disabled and so the user interaction of all the subViews will be disabled.
Make the changes as self.isUserInteractionEnabled = true it will work.