I have a UIButton in MyViewController called MyButton:
let myButton: UIButton = {
let button = UIButton()
button.isEnabled = false
return button
}()
I can't seem to figure out how to enable this button in another view controller. I tried doing this:
class MyOtherViewController: UIViewController {
func enableButton() {
let upload = MyViewController()
upload.myButton.isEnabled = true
}
}
but the button was not enabled.
It seems super simple, but I can't figure it out... Thanks in advance!
Related
I created a CollectionView. This view has a userProfileImageView and I want to change view controller to ProfilePage when clicked this user profile image. Try some code but neither present nor push view controller doesn't work to me. Can you help me ?
lazy var userProfileImageView: UIImageView = {
let useriv = UIImageView()
useriv.contentMode = .scaleAspectFill
useriv.clipsToBounds = true
useriv.layer.cornerRadius = 40 / 2
useriv.isUserInteractionEnabled = true
useriv.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(userImageTap)))
return useriv
}()
#objc func userImageTap() {
print("useriv clicked")
let profilePage = ProfilePage(collectionViewLayout: UICollectionViewFlowLayout())
}
I'm working on a crossword puzzle app for swift and I am having trouble getting a UIButton from a subview in the UIButton that is a textfield.
The text field takes up the space where the UIButton title should be, but when clicking on the textfield it doesn't click the UIButton.
The UIButton itself as of now, highlights all the UIButtons of the some column and row.
There a few things I've tried such as graving the superclass of the subview
var myButton: CustomButton = textfield.superclass as? CustomButton
and I also tried using
var myObject : CustomButton? {
return view.compactMap({$0 as? CustomButton }).first
}
In the CustomButton.swift
class CustomButton: UIButton {
var number: Int = 0
var letter: Character?
var textField: UITextField!
var cornerLabel: UILabel!
// this init will intialize the button through programatically
override init(frame: CGRect) {
super.init(frame: frame)
textField = UITextField(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
textField.translatesAutoresizingMaskIntoConstraints = false
textField.center = .zero
textField.textAlignment = .center
textField.text = ""
I have a ButtonStore.swift that stores all the CustomButtons in the array so I can manage them and retrieve certain ones.
And the MainController.swift has all the reference CustomButton. I am using a UITextFieldDelegate from the MainController
class MainController : UIViewController, UITextFieldDelegate{
var buttonStore : ButtonStore!
#IBOutlet var A1 : CustomButton!
#IBAction func buttonIsPress(sender: CustomButton){
let button : CustomButton = sender
let identifier : String = sender.accessibilityIdentifier ?? ""
// Clear all backgroundbox back to white unless the background is black
buttonStore.removeHighlights()
// Highlight the button pressed and its column and row
buttonStore.highlightRowColumn(identifier: identifier)
}
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool
{
print("something happened")
// TRIED RECEIVING THE CUSTOMBUTTON HERE
return true
}
The expected result is to have had the CustomButton trigger when textfield is pressed or grabbing the CustomButton of the textfield pressed so I use the CustomButton as reference.
You can get the superview by
if let button = textField.superview as? CustomButton {
// Do what you want to here
}
You can grab any superview or any parent view controller generically in a type safe way by walking up the responder chain (because both UIViewController and UIView inherit from UIResponder and implement its next method):
extension UIResponder {
func firstParent<T: UIResponder>(ofType type: T.Type ) -> T? {
return next as? T ?? next.flatMap { $0.firstParent(ofType: type) }
}
}
Use like:
if let button = textField.firstParent(ofType: CustomButton.self) {
//Do button stuff here
}
This method has the advantage that you can find the next parent of a particular type even if it isn't the immediate parent (ie you may have several views between the textfield and the CustomButton and this still works, while calling superview does not).
i'm trying to make a custom tab bar with some images i made and i'm having some trouble. I'm trying to add a button to the tab bar and it seems like i can't do it. I want to do something like this:
Then adding some animations to that button. How can i go about adding that button? Do i need to subclass UITabBarController? Thank you!
In TabbarController class, add this code
override func viewDidLoad() {
super.viewDidLoad()
setupMiddleButton()
}
// MARK: - AddButton
func setupCenterButton() {
let centerButton = UIButton(frame: CGRect(x: 0, y: 10, width: 45, height: 45))
var centerButtonFrame = centerButton.frame
centerButtonFrame.origin.y = (view.bounds.height - centerButtonFrame.height) - 2
centerButtonFrame.origin.x = view.bounds.width/2 - centerButtonFrame.size.width/2
centerButton.frame = centerButtonFrame
centerButton.layer.cornerRadius = 35
view.addSubview(centerButton)
centerButton.setBackgroundImage(#imageLiteral(resourceName: "tabPost"), for: .normal)
centerButton.addTarget(self, action: #selector(centerButtonAction(sender:)), for: .touchUpInside)
view.layoutIfNeeded()
}
// MARK: - Center button Actions
#objc private func centerButtonAction(sender: UIButton) {
selectedIndex = 2
}
It will work.. :)
You should implement the delegate method of UITabBarControllerDelegate:
func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
if viewController == (self.tabBarController?.viewControllers?[theIndexOfTheButton])! {
// do my stuffs here
return false
}
return true
}
Don't forget to set self.tabBarController?.delegate = self
I'm trying to add SearchController to UINavigationBar. I'm trying to set UITextField of UISearchBar after back button of UINavigationController. I want some more space after back button
When I start searching it appears as
Whereas I should be able to view back button. Only textfield width should be decreased. Also after Cancel it should be again back to initial layout. Whereas it is displayed as below:
Below is my code
var searchResultController = UISearchController()
self.searchResultController = ({
let controller = UISearchController(searchResultsController: nil)
controller.searchResultsUpdater = self
controller.dimsBackgroundDuringPresentation = false
controller.searchBar.sizeToFit()
controller.searchBar.delegate = self
controller.hidesNavigationBarDuringPresentation = false
self.navigationController?.navigationBar.addSubview(controller.searchBar)
return controller
})()
override func viewDidAppear(animated: Bool) {
for subView in searchResultController.searchBar.subviews{
for subsubView in subView.subviews {
if let textField = subsubView as? UITextField {
var bounds: CGRect
bounds = textField.frame
bounds.size.width = self.view.bounds.width - 50
}
}
}
}
Please let me know how can I fix this.
Thanks in advance
For setting the UIsearchBar add it to Navigation's titleView as
self.navigationItem.titleView = controller.searchBar
For removing Cancel button we can use UISearchControllerDelegate method
func didPresentSearchController(searchController: UISearchController) {
searchController.searchBar.showsCancelButton = false
}
Hope this may help any one.
I have a navigationcontroller with a right UIBarButtonItem. I have added a UIButton to the BarButtonItem.
How can I get to the button at run time, if possible without using tags?
var myButton:UIButton?
var rightButton = navigationItem.rightBarButtonItems?.first
for view in rightButton.subviews() {
if view.iskindOfClass(UIButton) {
myButton = view
break
}
}