Im trying to implement one refresher to tableView and scrollView on one ViewController. When there are no data - hide table view and show scrollView. Is it possible to implement one refresher so I don't need to write two?
class ViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
#IBOutlet weak var scrollView: UIScrollView!
#IBOutlet weak var allScreenView: UIView!
var refreshControl = UIRefreshControl()
override func viewDidLoad() {
super.viewDidLoad()
self.scrollView.isScrollEnabled = true
self.scrollView.alwaysBounceVertical = true
refreshControl.attributedTitle = NSAttributedString(string: "Update")
refreshControl.addTarget(self, action: #selector(refresh), for: UIControl.Event.valueChanged)
// Adding pull to request to scrollview
scrollView.addSubview(refreshControl)
// Adding pull to reqest to tableView
tableView.addSubview(refreshControl)
}
#objc func refresh(sender:AnyObject) {
// End refreshing after 1 second
DispatchQueue.main.asyncAfter(deadline: .now() + 1) { [weak self] in
self?.refreshControl.endRefreshing()
}
}
}
When I implement to both, it doesn't refresh
Related
I want to set a custom font to UIButton. I need to set it programmatically because the font is not applied otherwise. The problem is that it changes back to the built-in font after the click. What am I doing wrong?
import UIKit
class LoginViewController: UIViewController {
#IBOutlet weak var emailTextField: UITextField!
#IBOutlet weak var passwordTextField: UITextField!
#IBOutlet weak var eyeButton: UIButton!
#IBOutlet weak var loginButton: UIButton!
var iconClick = true
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
}
override func viewDidLoad() {
super.viewDidLoad()
loginButton.titleLabel?.font = UIFont(name: "Capitana-Bold", size: CGFloat(16))
}
#IBAction func iconAction(sender: AnyObject) {
if (iconClick == true) {
passwordTextField.isSecureTextEntry = false
eyeButton.setImage(UIImage(named: "eye-closed"), for: .normal)
} else {
passwordTextField.isSecureTextEntry = true
eyeButton.setImage(UIImage(named: "eye-open"), for: .normal)
}
iconClick = !iconClick
}
#IBAction func onLoginClicked(_ sender: Any) {
}
}
In iOS 15 you need to use configuration for button. This should work:
loginButton.configuration?.attributedTitle?.font = UIFont(name: "Capitana-Bold", size: CGFloat(16))
This is an iOS 15 Filled button. You cannot configure it by saying
loginButton.titleLabel?.font = ...
That was possible (but wrong) in iOS 14 and before, but with an iOS 15 button it is impossible. To configure a Filled button programmatically, you must set its configuration object.
https://developer.apple.com/documentation/uikit/uibutton/configuration
In particular you want to set the button configuration attributed title.
https://developer.apple.com/documentation/uikit/uibutton/configuration/3750779-attributedtitle
I have created one popView with textfield and button in ViewController. if i click button then popView is appearing, and i am able to enter text in textfield and submit is working, and if i tap anywhere in view also i am able to remove popView, but here i want if i tap on anywhere in popView i don't want to dismiss popView, Please help me in the code.
here is my code:
import UIKit
class PopUPViewController: UIViewController {
#IBOutlet weak var popView: UIView!
#IBOutlet weak var inputField: UITextField!
#IBOutlet weak var textLabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
popView.isHidden = true
// Do any additional setup after loading the view.
}
#IBAction func butnAct(_ sender: Any) {
view?.backgroundColor = UIColor(white: 1, alpha: 0.9)
popView.isHidden = false
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(PopUPViewController.dismissView))
view.addGestureRecognizer(tap)
}
#objc func dismissView() {
self.popView.isHidden = true
view?.backgroundColor = .white
}
#IBAction func sendButton(_ sender: Any) {
self.textLabel.text = inputField.text
}
}
In my code if i tap anywhere in the view popView is removing even if i tap on popView also its removing, i don't need that, if i tap on popView then popView need not to be remove.
Please help me in the code
You can override the touchesBegan method which is triggered when a new touch is detected in a view or window. By using this method you can check a specific view is touched or not.
Try like this
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
let touch = touches.first
if touch?.view != self.popView {
dismissView()
}
}
func dismissView() {
self.popView.isHidden = true
view?.backgroundColor = .white
}
It's not the way I would have architected this, but to get around the problem you face you need to adapt your dismissView method so that it only dismisses the view if the tap is outside the popView.
To do this modify your selector to include the sender (the UITapGestureRecogniser )as a parameter:
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(PopUPViewController.dismissView(_:)))
and then in your function accept that parameter and test whether the tap is inside your view, and if so don't dismiss the view:
#objc func dismissView(_ sender: UITapGestureRegognizer) {
let tapPoint = sender.location(in: self.popView)
if self.popView.point(inside: tapPoint, with: nil)) == false {
self.popView.isHidden = true
view?.backgroundColor = .white
}
}
Your Popup view is inside the parent view of viewcontroller that's why on tap of popview also your popview is getting hidden.
So to avoid just add a view in background and name it bgView or anything what you want and replace it with view. And it will work fine .
Code:
#IBOutlet weak var bgView: UIView!//Add this new outlet
#IBOutlet weak var popView: UIView!
#IBOutlet weak var inputField: UITextField!
#IBOutlet weak var textLabel: UILabel!
#IBOutlet weak var submitButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
popView.isHidden = true
}
#IBAction func butnAct(_ sender: Any) {
bgView.backgroundColor = UIColor(white: 1, alpha: 0.9)//change view to bgView[![enter image description here][1]][1]
popView.isHidden = false
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ViewController.dismissView))
bgView.addGestureRecognizer(tap)//change view to bgView
}
#objc func dismissView() {
self.popView.isHidden = true
bgView.backgroundColor = .white//change view to bgView
}
#IBAction func sendButton(_ sender: Any) {
self.textLabel.text = inputField.text
}
I tried to use a UIRefreshControll in a UIScrollView but I had the problem that I needed to scroll a lot in order to get it to refresh. I needed to use both hands to make it work so I decided to write some scrolling logic to start the refreshing.
Now the problem is that sometimes the endRefreshing function doesn't make the UIRefreshControll view disappear and I end up having it there forever.
I have tried called endRefreshing in the main queue with a delay and it doesn't work. I have also tried setting isHidden to true and also removeFromSuperView. I've had no luck in making it work.
import UIKit
class RefreshableView : UIView {
#IBOutlet weak var scrollView: UIScrollView!
private let refreshControl = UIRefreshControl()
private var canRefresh = true
var refreshFunction: (() -> ())?
func setupUI() {
backgroundColor = ColorName.grayColor.color
scrollView.refreshControl = refreshControl
}
func endRefreshing() {
self.refreshControl.endRefreshing()
}
}
extension RefreshableView: UIScrollViewDelegate {
func scrollViewDidScroll(_ scrollView: UIScrollView) {
if scrollView.contentOffset.y < -100 {
if canRefresh && !self.refreshControl.isRefreshing {
self.canRefresh = false
self.refreshControl.beginRefreshing()
self.refreshFunction?()
}
} else if scrollView.contentOffset.y >= 0 {
self.canRefresh = true
}
}
}
The scroll view's refreshControl handles the pull-to-refresh feature automatically, so you don't need any of the scrollViewDidScroll() code.
Assuming your storyboard looks something like this, where:
the view with the Red background is an instance of RefreshableView class
it contains a scroll view (connected via #IBOutlet)
and some content in the scroll view (here I have just a single label)
Your code can be like this:
class RefreshableView : UIView {
#IBOutlet var scrollView: UIScrollView!
private let refreshControl = UIRefreshControl()
var refreshFunction: (() -> ())?
func setupUI() {
backgroundColor = .gray
refreshControl.addTarget(self, action: #selector(didPullToRefresh), for: .valueChanged)
scrollView.refreshControl = refreshControl
}
#objc func didPullToRefresh() {
print("calling refreshFunction in controller")
self.refreshFunction?()
}
func endRefreshing() {
print("end refreshing called from controller")
self.refreshControl.endRefreshing()
}
}
class RefreshTestViewController: UIViewController {
#IBOutlet var theRefreshableView: RefreshableView!
override func viewDidLoad() {
super.viewDidLoad()
theRefreshableView.setupUI()
theRefreshableView.refreshFunction = {
print("simulating refresh for 2 seconds...")
DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {
[weak self] in
guard let self = self else { return }
// do what you want to update the contents of theRefreshableView
// ...
// then tell theRefreshableView to endRefreshing
self.theRefreshableView.endRefreshing()
}
}
}
}
I'm trying to put a UITapGestureRecognizer on UIImageView in UICollectionViewCell but it does not work. Here is the code:
class ImageGalleryCell : UICollectionViewCell {
#IBOutlet weak var imgPhoto: UIImageView!
let uniqueTag = String.random()
func setup(){
let rec = UITapGestureRecognizer.init(target: self, action: #selector(tap))
imgPhoto.addGestureRecognizer(rec)
}
#objc func tap(){
print("tap")
}
}
What am I doing wrong?
Based on the code snippet you provide, it seems that you should manually set the image view isUserInteractionEnabled property to true -since it is false by default-, in setup:
func setup(){
let rec = UITapGestureRecognizer.init(target: self, action: #selector(tap))
// here we go:
imgPhoto.isUserInteractionEnabled = true
imgPhoto.addGestureRecognizer(rec)
}
Also, I would suggest to call setup method in the cell class itself, in the awakeFromNib() instead of calling it in the view controller - tableView(_:cellForRowAt:) (or any method in the view controller layer), simply like this:
class ImageGalleryCell : UICollectionViewCell {
#IBOutlet weak var imgPhoto: UIImageView!
//let uniqueTag = String.random()
func setup(){
let rec = UITapGestureRecognizer.init(target: self, action: #selector(tap))
// here we go:
imgPhoto.isUserInteractionEnabled = true
imgPhoto.addGestureRecognizer(rec)
}
#objc func tap(){
print("tap")
}
override func awakeFromNib() {
super.awakeFromNib()
setup()
}
}
That's because such a behavior should be setup only for one time when delivering the cell but not each time it has been shown.
I'm very new to all of this and I found some code that got me understanding some of this syntax. I'm trying to create a textfield that lets me type in a value that updates the stepper's value. The stepper currently works (updates the uitextfield) but when I change the value in the textfield it doesn't update the stepper's value, so when I click on the stepper, it reverts back to whatever value it was before I typed in a value... Can anyone tell me why the two functions STracksValueDidChange and CTrackValueDidChange have errors?
Here's my code so far:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var STracks: UITextField!
#IBOutlet weak var STracksStepper: UIStepper!
#IBOutlet weak var CTracks: UITextField!
#IBOutlet weak var CTrackStepper: UIStepper!
override func viewDidLoad() {
super.viewDidLoad()
STracksStepper.autorepeat = true
STracksStepper.maximumValue = 100.0
STracksStepper.minimumValue = 2.0
STracksStepper.stepValue = 2.0
print(STracksStepper.value)
STracks.text = "\(Int(STracksStepper.value))"
STracksStepper.addTarget(self, action: "SstepperValueDidChange:", forControlEvents: .ValueChanged)
STracks.addTarget(self, action: "STextValueDidChange:", forControlEvents: .ValueChanged)
CTrackStepper.autorepeat = true
CTrackStepper.maximumValue = 100.0
CTrackStepper.minimumValue = 2.0
CTrackStepper.stepValue = 2.0
print(CTrackStepper.value)
CTracks.text = "\(Int(CTrackStepper.value))"
CTrackStepper.addTarget(self, action: "CstepperValueDidChange:", forControlEvents: .ValueChanged)
CTracks.addTarget(self, action: "CTextValueDidChange:", forControlEvents: .ValueChanged)
}
//Steppers will update UITextFields
func SstepperValueDidChange(stepper: UIStepper) {
let stepperMapping: [UIStepper: UITextField] = [STracksStepper: STracks]
stepperMapping[stepper]!.text = "\(Int(stepper.value))"
}
func STracksValueDidChange(SText: UITextField) {
let STextMapping: [UITextField: UIStepper] = [STracks: STracksStepper]
STextMapping[SText]!.value = "(SText.text)"
}
func CstepperValueDidChange(stepper: UIStepper) {
let stepperMapping: [UIStepper: UITextField] = [CTrackStepper: CTracks]
stepperMapping[stepper]!.text = "\(Int(stepper.value))"
}
func CTrackValueDidChange(CText: UITextField) {
let CTextMapping: [UITextField: UIStepper] = [CTracks: CTrackStepper]
CTextMapping[CText]!.value = "(CText.text)"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Try something like this.
CTrackStepper.value = Double(Textfield.text)
I am not so sure what the mapping is in your code.
But i don't think you need it for changing the value.
Update, made a project my self:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var textfield: UITextField!
#IBOutlet weak var stepper: UIStepper!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func stepperValueChanged(sender: UIStepper) {
textfield.text = String(sender.value)
}
#IBAction func valueChanged(sender: UITextField) {
if Double(sender.text!) != nil {
stepper.value = Double(sender.text!)!
}
}
}
For steppervaluechanged and valuechanged just drag from uistepper and textfield and choose action and change the Anyobject to Uistepper of Uitextfield.
Good luck :)