I have cell with UILabel and Button. For the first time label have three rows.
When I tap on the button, number of lines increase and my cell change size, but without animation. how I can correct it?
My code inside cell:
func buttonTap() {
if textIsHide == true {
descriptionLabel.numberOfLines = 100
textIsHide = false
button.setTitle(.localized(for: "posters_postercard_hide"), for: .normal)
} else {
descriptionLabel.numberOfLines = 3
textIsHide = true
button.setTitle(.localized(for: "posters_postercard_showmore"), for: .normal)
}
delegate?.reloadRows()
descriptionLabel.layoutIfNeeded()
}
And this is my UIView, where I update my table:
extension PosterCardView: PosterCardDataManagerDelegate {
func reloadRows() {
tableView.beginUpdates()
tableView.endUpdates()
}
func buttonTap() {
if textIsHide == true {
withAnimation {
descriptionLabel.numberOfLines = 100
textIsHide = false
button.setTitle(.localized(for: "posters_postercard_hide"), for: .normal)
}
} else {
withAnimation{
descriptionLabel.numberOfLines = 3
textIsHide = true
button.setTitle(.localized(for: "posters_postercard_showmore"), for: .normal)
}
}
delegate?.reloadRows()
descriptionLabel.layoutIfNeeded()
}
have you ever tried with an animation?
Related
By pressing a button in my app, the value of a variable falls by 3. While this happens without any issues, the label which uses string interpolation to show that variable as its text (label.text) does not reflect the change.
How can I make it so pressing the button changes the value of the UILabel?
import UIKit
class ViewController: UIViewController {
var token = 5
let theButton: UIButton = {
let button = UIButton(type: .system)
button.setTitle("button", for: .normal)
button.backgroundColor = .systemPink
button.addTarget(self, action: #selector(theButtonPressed), for: .touchUpInside)
button.translatesAutoresizingMaskIntoConstraints = false
return button
}()
#objc func theButtonPressed() {
if token >= 3 {
token -= 3
print("ok done")
} else {
print("nope")
}
}
lazy var tokenLabel: UILabel = {
let label = UILabel()
label.text = "\(token)"
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemBlue
view.addSubview(tokenLabel)
view.addSubview(theButton)
theButton.heightAnchor.constraint(equalToConstant: 100).isActive = true
theButton.widthAnchor.constraint(equalToConstant: 200).isActive = true
theButton.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
theButton.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
tokenLabel.centerYAnchor.constraint(equalTo: view.centerYAnchor, constant: 60).isActive = true
tokenLabel.heightAnchor.constraint(equalToConstant: 300).isActive = true
tokenLabel.widthAnchor.constraint(equalToConstant: 200).isActive = true
tokenLabel.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
}
}
You need to update the label's text when the button is pressed.
#objc func theButtonPressed() {
if token >= 3 {
token -= 3
print("ok done")
tokenLabel.text = "\(token)" // <- update
} else {
print("nope")
}
}
Or, you can observe the property token and change the label when a new value is set.
var token = 5 {
didSet {
tokenLabel.text = "\(token)"
}
}
#objc func theButtonPressed() {
if token >= 3 {
token -= 3
print("ok done")
} else {
print("nope")
}
}
I solved the problem
override func viewDidLoad() {
super.viewDidLoad()
let save = UserDefaults.standard.bool(forKey: "RememberMe")
self.circleBox.isChecked = save
}
#objc func checkboxvalue(sender: Checkbox) {
if sender.isChecked == true {
labelcheckbox.text = ("Beni")
action((Any).self)
UserDefaults.standard.set(true, forKey:"RememberMe");
}else{
labelcheckbox.text = ("")
UserDefaults.standard.set(false, forKey:"RememberMe");
}
}
I've designed a recall checkbox. But when I log out of the application, I want the checkbox value to be set to UserDefaults as true or false. So I want the checkbox to remember true or false when I get into the application.
lazy var circleBox: Checkbox = {
let squareBox = Checkbox(frame: CGRect(x: 22, y: 290, width: 25, height: 25))
squareBox.tintColor = .black
squareBox.borderStyle = .square
squareBox.checkmarkStyle = .square
squareBox.uncheckedBorderColor = .lightGray
squareBox.borderWidth = 1
squareBox.addTarget(self, action: #selector(checkboxvalue(sender:)), for: .valueChanged)
return squareBox
}()
#objc func checkboxvalue(sender: Checkbox) {
if sender.isChecked == true {
labelcheckbox.text = ("Remember me")
action((Any).self)
}else{
labelcheckbox.text = ("Don't remember")
}
}
I'm subclassing a UITextfield in order to create a overlay button to the right which will toggle the isSecureTextEntry boolean. Typically when creating IBActions in storyboard the boolean is determined based on the sender which I'd implement in Objective-C code like this:
-(IBAction)showPasswordTapped:(UIButton *)sender{
sender.selected = !sender.selected;
self.passwordField.secureTextEntry = !sender.selected;
}
However, now that I'm subclassing I was thinking of using an if else statement but the logic looked as if it would just set the boolean back to true. What would be the appropriate conditional statement if I don't have access to sender?
Here is my subclass in Swift:
class SecurePasswordUITextField : UITextField {
override func awakeFromNib() {
super.awakeFromNib()
self.isSecureTextEntry = true
var overlayButton = UIButton.init(type: UIButtonType.custom)
overlayButton.titleLabel = "Show"
overlayButton.addTarget(self, action: #selector(showSecureCharacters), for: .touchUpInside)
overlayButton = CGRect.init(x: self.bounds.origin.x, y: self.bounds.origin.y, width: 28, height: 28)
self.rightView = overlayButton
self.rightViewMode = UITextFieldViewMode.always
}
func showSecureCharacters(){
if self.isSecureTextEntry {
self.isSecureTextEntry = false
} else {
self.isSecureTextEntry = true
}
if !self.isSecureTextEntry{
self.isSecureTextEntry = true
} else {
self.isSecureTextEntry = false
}
}
}
You can access the sender
overlayButton.addTarget(self, action: #selector(showSecureCharacters(_:)), for: .touchUpInside)
//
#objc func showSecureCharacters(_ sender:UIButton){ --- }
Also this is sufficient
self.isSecureTextEntry = !self.isSecureTextEntry
I want to change the label in my header to correlate with my UISwitch
though I have have no success as yet?
setLeftNavButton() is called in viewDidLoad()
func setLeftNavButton() {
let switchControl=UISwitch()
//switchControl.isOn = true
//switchControl.setOn(true, animated: false)
switchControl.addTarget(self, action: #selector(switchValueDidChange), for: .valueChanged)
self.navigationItem.leftBarButtonItem = UIBarButtonItem.init(customView: switchControl)
self.switchControl = switchControl
}
var switchControl: UISwitch?
func switchValueDidChange(){
guard let mySwitch = switchControl else { return }
if mySwitch.isOn {
header?.onlineOfflineStatusLabel.text = "on"
}
else {
header?.onlineOfflineStatusLabel.text = "off"
}
self.header?.reloadInputViews()
self.collectionView?.reloadData()
}
try this:
func setLeftNavButton() {
let switchControl = UISwitch()
switchControl.addTarget(self, action: #selector(switchValueDidChange(_:)), for: .valueChanged)
self.navigationItem.leftBarButtonItem = UIBarButtonItem.init(customView: switchControl)
self.switchControl = switchControl
}
#objc
func switchValueDidChange(_ sender: UISwitch){
if sender.isOn {
header?.onlineOfflineStatusLabel.text = "on"
} else {
header?.onlineOfflineStatusLabel.text = "off"
}
self.header?.reloadInputViews()
self.collectionView?.reloadData()
}
How to know my button selected or not in swift 3 .selected property not found.
when i type checkBtn.selected not found in Swift 3 (Xcode 8.0)
if let button = sender as? UIButton {
if button.selected {
// set selected
button.selected = true
} else {
// set deselected
button.selected = false
}
}
try this below code
if let button = sender as? UIButton {
if button.isSelected {
// set selected
button.isSelected = true
} else {
// set deselected
button.isSelected = false
}
}
For shorthand, try this
if let button = sender as? UIButton {
button.isSelected = !button.isSelected
}
In swift 3 you will have isSelected instead of selected. Your code looks fine just make a change.
if let button = sender as? UIButton {
if button.isSelected {
//for selected input
} else {
//for not selected input
}
button.isSelected = !button.isSelected //toggle the text box
}
#IBOutlet weak var btnCheckBox: UIButton!
#IBAction func btnCheckBoxClick(_ sender: UIButton) {
if btnCheckBox.isSelected {
btnCheckBox.isSelected = false
btnCheckBox.setImage(#imageLiteral(resourceName: "icon_checkbox_inactive"), for: .normal)
}else {
btnCheckBox.isSelected = true
btnCheckBox.setImage(#imageLiteral(resourceName: "icon_checkbox_active"), for: .normal)
}
}
It worked for me.