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.
Related
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!!!")
}
}
this is the code where i am configuring the cell.
cell.configure(image: models[indexPath.item].image, tagText: models[indexPath.item].tag, priceIcon: models[indexPath.item].priceIcon, value: models[indexPath.item].price)
and this is my code for cell.
//
// ImageCollectionViewCell.swift
// tr0ve-iOSApp
//
//
//
// ImageCollectionViewCell.swift
// MyCollectionView
//
import UIKit
class ImageCollectionViewCell: UICollectionViewCell {
static let identifier = "ImageCollectionViewCell"
let itemView = UIView()
override init(frame: CGRect) {
super.init(frame: frame)
contentView.addSubview(itemView)
contentView.clipsToBounds = true
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layoutSubviews() {
super.layoutSubviews()
itemView.frame = contentView.bounds
}
override func prepareForReuse() {
super.prepareForReuse()
itemView.subviews.forEach { view in
view.removeFromSuperview()
}
}
func configure (image: UIImage?, tagText: String, priceIcon: UIImage, value: Float){
let imageView = UIImageView(image: image)
let priceTagView = UIView(frame: CGRect(x: 5, y: contentView.frame.size.height-50, width: 60, height: 20))
priceTagView.backgroundColor = .black
let valueLabel = UILabel(frame: CGRect(x: 20, y: 5, width: 35, height: 10))
valueLabel.textColor = .white
valueLabel.text = String(value)
valueLabel.font = UIFont.systemFont(ofSize: 12, weight: .regular)
let priceIconView = UIImageView(frame: CGRect(x: 5, y: 5, width: 10, height: 10))
priceIconView.image = priceIcon
priceTagView.addSubview(priceIconView)
priceTagView.addSubview(valueLabel)
let tag = UILabel(frame: CGRect(x: 100, y: contentView.frame.size.height-50, width: 20, height: 20))
tag.text = tagText
tag.textColor = .white
tag.textAlignment = .center
if tagText == "UC" {
tag.backgroundColor = .green
}
else {
tag.backgroundColor = .blue
}
itemView.addSubview(imageView)
itemView.addSubview(priceTagView)
itemView.addSubview(tag)
}
}
[in this image i want to add subview in cell's bottom, and in tried it using image's frame and by contentView's frame. but it is doing good for some cells and bad for the other ones. and when i scroll everyhing meshes up.1
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 am trying to access the MyCustomView from another class using the following code in ViewController.swift ..
var view = MyCustomView(frame: CGRectZero)
.. in the viewDidLoad method. The problem is the view does not get initialized in the simulator.
I have already set class in storyboard for the current ViewController.
class MyCustomView: UIView {
var label: UILabel = UILabel()
var myNames = ["dipen","laxu","anis","aakash","santosh","raaa","ggdds","house"]
override init(){
super.init()
}
override init(frame: CGRect) {
super.init(frame: frame)
self.addCustomView()
}
required init(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func addCustomView() {
label.frame = CGRectMake(50, 10, 200, 100)
label.backgroundColor=UIColor.whiteColor()
label.textAlignment = NSTextAlignment.Center
label.text = "test label"
label.hidden=true
self.addSubview(label)
var btn: UIButton = UIButton()
btn.frame=CGRectMake(50, 120, 200, 100)
btn.backgroundColor=UIColor.redColor()
btn.setTitle("button", forState: UIControlState.Normal)
btn.addTarget(self, action: "changeLabel", forControlEvents: UIControlEvents.TouchUpInside)
self.addSubview(btn)
var txtField : UITextField = UITextField()
txtField.frame = CGRectMake(50, 250, 100,50)
txtField.backgroundColor = UIColor.grayColor()
self.addSubview(txtField)
}
The CGRectZero constant is equal to a rectangle at position (0,0) with zero width and height. This is fine to use, and actually preferred, if you use AutoLayout, since AutoLayout will then properly place the view.
But, I expect you do not use AutoLayout. So the most simple solution is to specify the size of the custom view by providing a frame explicitly:
customView = MyCustomView(frame: CGRect(x: 0, y: 0, width: 200, height: 50))
self.view.addSubview(customView)
Note that you also need to use addSubview otherwise your view is not added to the view hierarchy.
Swift 3 / Swift 4 Update:
let screenSize: CGRect = UIScreen.main.bounds
let myView = UIView(frame: CGRect(x: 0, y: 0, width: screenSize.width - 10, height: 10))
self.view.addSubview(myView)
var customView = UIView()
#IBAction func drawView(_ sender: AnyObject) {
customView.frame = CGRect.init(x: 0, y: 0, width: 100, height: 200)
customView.backgroundColor = UIColor.black //give color to the view
customView.center = self.view.center
self.view.addSubview(customView)
}
let viewDemo = UIView()
viewDemo.frame = CGRect(x: 50, y: 50, width: 50, height: 50)
self.view.addSubview(viewDemo)
view = MyCustomView(frame: CGRectZero)
In this line you are trying to set empty rect for your custom view. That's why you cant see your view in simulator.