I am trying to align my UIButton and UILabel, however when I use size to fit for each of them the frame is of a different height. I want my UIButton frame height to be the same height as my UILabel. Both views added as subview on my main view, in my viewdidload. This is what I get
//create account button
let createAccount: UIButton = {
let create = UIButton()
create.translatesAutoresizingMaskIntoConstraints = false
create.setTitleColor(.orange, for: .normal)
create.setTitle("Create", for: .normal)
create.titleLabel?.font = UIFont.systemFont(ofSize: 18)
create.addTarget(self, action: #selector(forgot(_ :)), for: .touchUpInside)
create.sizeToFit()
create.backgroundColor = .red
return create
}()
let phraseOne: UILabel = {
let labelOne = UILabel()
labelOne.translatesAutoresizingMaskIntoConstraints = false
labelOne.text = "Dont have an account?"
labelOne.font = UIFont(name: labelOne.font.fontName, size: 18)
labelOne.textAlignment = .right
labelOne.sizeToFit()
labelOne.textColor = .white
labelOne.backgroundColor = .red
return labelOne
}()
override func viewDidLoad() {
super.viewDidLoad()
//Add subview phraseOne Forgot your password?
view.addSubview(phraseOne)
setupPhraseOne() //add constraints
view.addSubview(createAccount)
setupCreate() // add constraints
}
Related
I am trying to center a Button onto the bottom of a view but it never appears. The only time it appears is when I uncomment takePhotoButton.frame. What is the proper way to do this?
import UIKit
import AVFoundation
class InputViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let photoPreviewImageView = UIImageView()
photoPreviewImageView.frame = view.bounds
photoPreviewImageView.backgroundColor = UIColor.green
view.addSubview(photoPreviewImageView)
let imageOfPhotoButton = UIImage(named: "smallcircle.circle.fill") as UIImage?
let takePhotoButton = UIButton(type: .custom) as UIButton
takePhotoButton.setImage(imageOfPhotoButton, for: .normal)
//takePhotoButton.frame = CGRect(x: 10, y: 10, width: 60, height: 60) // It will appear with this code however i took it away because im trying to center it at the bottom of the screen
takePhotoButton.center = view.center
photoPreviewImageView.addSubview(takePhotoButton)
}
}
Use constraint anchors. After you add the takePhotoButton set them the following way:
takePhotoButton.bottomAnchor.constraint(equalTo: photoPreviewImageView.bottomAnchor).isActive = true
takePhotoButton.centerXAnchor.constraint(equalTo: photoPreviewImageView.centerXAnchor).isActive = true
This will set make your button have the same bottom and center as it's container.
Good day,
you have to add constraint.
import UIKit
class ViewController: UIViewController {
var loginButton : UIButton = {
let button = UIButton(type: .system)
button.setTitle("Login", for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
button.backgroundColor = .red
button.tintColor = .white
return button
}()
override func viewDidLoad() {
super.viewDidLoad()
constraintsInit()
}
func constraintsInit(){
view.addSubview(loginButton)
NSLayoutConstraint.activate([
loginButton.centerYAnchor.constraint(equalTo: self.view.centerYAnchor),
loginButton.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
loginButton.heightAnchor.constraint(equalToConstant: 30),
loginButton.leadingAnchor.constraint(equalTo: self.view.leadingAnchor,constant: 30),
loginButton.trailingAnchor.constraint(equalTo: self.view.trailingAnchor,constant: -30),
])
}
}
on youtube you can find several people that explain how create the views, using only code.
This code can be copy paste inside a newly created project:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let label = createLabel()
let imageView = createImageView()
let stackView = UIStackView(arrangedSubviews: [imageView, label])
stackView.axis = .vertical
stackView.spacing = 5
view.addSubview(stackView)
stackView.translatesAutoresizingMaskIntoConstraints = false
stackView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
stackView.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
Timer.scheduledTimer(withTimeInterval: 1, repeats: false) { (_) in
imageView.isHidden = true
}
}
func createLabel() -> UILabel {
let label = UILabel(frame: .zero)
label.text = "Some Text"
label.setContentHuggingPriority(.required, for: .horizontal)
label.setContentHuggingPriority(.required, for: .vertical)
label.backgroundColor = .green
return label
}
func createImageView() -> UIImageView {
let imageView = UIImageView()
imageView.backgroundColor = .red
imageView.heightAnchor.constraint(equalToConstant: 200).isActive = true
imageView.heightAnchor.constraint(equalTo: imageView.widthAnchor).isActive = true
return imageView
}
}
It is a UILabel and a UIImageView inside a UIStackView. When I hide the UIImageView, I see that the UIStackView correctly adapts itselfs to the UILabel's height. However, the UIStackView does not adapts itself to the width of the UILabel.
How can I make the UIStackView resize itself to it's only visible views/UILabel? I made a variabele constraint for the UIImageView's height anchor constant and turning that off when hiding the UIImageView, but than the UILabel disappears for some odd reason.
Add stackview alignment
This property determines how the stack view lays out its arranged
views perpendicularly to its axis. The default value is
UIStackView.Alignment.fill.
stackView.alignment = .leading
Stackview resizes itself to it's only visible UILabel
Try changing the Distribution to Fill Equally in the UIStackView's Attribute Inspector and the Alignment to Fill or to center as you like it to be.
I create and display uiview in live view windows, when i create the button and add to the uiview , the program fail with nonstop looping which continuously load addbutton . Did somebody meet this problem and please tell me why :-)
import UIKit
import PlaygroundSupport
class MyViewController : UIViewController {
var label1 : UILabel?
override func loadView() {
let view = UIView()
view.backgroundColor = .white
print("code run here ")
let label = UILabel()
label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
label.text = "Hello World!"
label.textColor = .black
label1 = label
view.addSubview(label)
let k1:UIButton = addnewbutton() as! UIButton
//view.addSubview(k1)
self.view = view
}
#objc func buttonPressed(sender: UIButton!) {
var alertController = UIAlertController(title: "title", message: "message", preferredStyle: UIAlertControllerStyle.alert)
self.present(alertController, animated: true, completion: nil)
}
func addnewbutton() -> UIView{
var btn : UIButton
btn = UIButton()
btn.frame = CGRect(x:200,y:300,width:100,height:25)
btn.setTitle("clickme",for: UIControlState.normal)
//btn.titleLabel?.text = "clickme"
btn.backgroundColor = UIColor.black
btn.titleLabel?.textColor = UIColor.white
btn.titleColor(for: UIControlState.normal)
btn.addTarget(self, action: #selector(buttonPressed), for: UIControlEvents.touchUpInside)
view.addSubview(btn)
return btn
}
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()
You add the button here
view.addSubview(btn)
inside addnewbutton
which recursively searches for the parent view of the VC and it's not yet setted inside loadView so control calls it again and the problem happens to infinite loop , so comment that line and uncomment this
view.addSubview(k1) // which is inside loadView
BTW make the return of addnewbutton to UIButton directly instead of a cast
When I do this in AppDelegate:
window?.rootViewController = {
let mainController = MenuViewController()
return mainController
}()
I get this:
But when I do this in AppDelegate:
window?.rootViewController = {
let mainController = UINavigationController(rootViewController: MenuViewController())
return mainController
}()
I get this:
Why and how do I fix? Please specify which information if more information is needed.
Here is the MenuView code that lays out the buttons manually and also sets up the properties of the buttons:
class MenuView: UIView {
//title
let titleLabel: UILabel = {
let label = UILabel()
label.text = "Survive The Attackers!!"
label.backgroundColor = UIColor.white
return label
}()
//set up buttons
let newGameButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle("New Game", for: .normal)
button.setTitleColor(UIColor.black, for: .normal)
button.backgroundColor = UIColor.white
button.layer.borderWidth = 2.0;
button.layer.borderColor = UIColor.black.cgColor
return button
}()
let resumeButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle("Resume Game", for: .normal)
button.setTitleColor(UIColor.black, for: .normal)
button.backgroundColor = UIColor.white
button.layer.borderWidth = 2.0;
button.layer.borderColor = UIColor.black.cgColor
return button
}()
let highScoresButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle("High Scores", for: .normal)
button.setTitleColor(UIColor.black, for: .normal)
button.backgroundColor = UIColor.white
button.layer.borderWidth = 2.0;
button.layer.borderColor = UIColor.black.cgColor
return button
}()
//add subviews and initialize the view
override init(frame: CGRect){
super.init(frame: frame)
self.backgroundColor = UIColor(patternImage: UIImage(named: "background1.png")!)
addSubview(titleLabel)
addSubview(newGameButton)
addSubview(resumeButton)
addSubview(highScoresButton)
}
required init?(coder aDecoder: NSCoder) {
fatalError("It's Apple. What did you expect?")
}
//manually layout the main menu
override func layoutSubviews() {
var cursor: CGPoint = .zero
let buttonHeight = CGFloat(40.0);
let buttonWidth = CGFloat(160.0);
let labelWidth = buttonWidth + 20;
let spacing = bounds.height/4
let titleY = 2/3 * spacing
cursor.y = titleY
cursor.x = bounds.width/2 - labelWidth/2
titleLabel.frame = CGRect(x: cursor.x, y: cursor.y, width: labelWidth, height: buttonHeight)
cursor.y = spacing
cursor.x = bounds.width/2 - buttonWidth/2
newGameButton.frame = CGRect(x: cursor.x, y: cursor.y, width: buttonWidth, height: buttonHeight)
cursor.y += spacing
resumeButton.frame = CGRect(x: cursor.x, y: cursor.y, width: buttonWidth, height: buttonHeight)
cursor.y += spacing
highScoresButton.frame = CGRect(x: cursor.x, y: cursor.y, width: buttonWidth, height: buttonHeight)
}
The buttons are laid out manually in layoutSubviews
Here is my MenuView controller code:
class MenuViewController: UIViewController {
var delegateID: String = UUIDVendor.vendUUID()
private var menuView: MenuView {
return view as! MenuView
}
init(){
super.init(nibName: nil, bundle: nil)
//edgesForExtendedLayout = .init(rawValue: 0)
}
required init?(coder aDecoder: NSCoder){
fatalError()
}
//loads the view in and sizes it correctly
override func loadView() {
view = MenuView()
//extendedLayoutIncludesOpaqueBars = false
}
override func viewDidLoad() {
menuView.newGameButton.addTarget(self, action: #selector(MenuViewController.newGameButtonTapped(button:)), for: .touchUpInside)
menuView.resumeButton.addTarget(self, action: #selector(MenuViewController.resumeGameButtonTapped(button:)), for: .touchUpInside)
menuView.highScoresButton.addTarget(self, action: #selector(MenuViewController.highScoreButtonTapped(button:)), for: .touchUpInside)
menuView.setNeedsLayout()
}
//fuction that handles the event when the newGameButton is tapped
#objc func newGameButtonTapped(button: UIButton){
//reset the data in the model somehow
navigationController?.pushViewController(GameViewController(), animated: true)
}
//function that handles the event when the resume game button is tapped
#objc func resumeGameButtonTapped(button: UIButton){
}
//function that handels the event when the high scores button is tapped
#objc func highScoreButtonTapped(button: UIButton){
}
call super for layoutSubviews
private var menuView: MenuView = {
let vw = MenuView()
return vw
}()
override func viewDidLoad() {
super.viewDidLoad()
view = MenuView() //Add here
//Your code
}
And remove loadView() from MenuViewController
I am trying to print multiple textField in middle of the view but I can't. I wanna clickable textfield.textfield should be middle of the view and font size will be manage as textfield size.
This is my code:
for i in 0..<characters.count
{
let textField : UITextField = UITextField(frame : CGRect(x:(charWidth/13) * CGFloat(i) + CenterX, y:0, width:charWidth/14, height:charWidth/12))
textField.font = UIFont(name: "Noteworthy", size: 50)
textField.text = "\(characters[i])".lowercased()
textField.textAlignment = .center
textField.resizeText()
textField.adjustsFontSizeToFitWidth = true
textField.minimumFontSize = 1.0
textField.delegate = self
textField.autocapitalizationType = .none
//textView.font = UIFont
}
Try simply use different method for a textField and firstly you take textField not a textView. All textFields have a its own outlets.
How do I check when a UITextField changes?
https://developer.apple.com/reference/uikit/uitextfielddelegate
Here is the code for Swift 3 clickable textField:
myTextField.addTarget(self, action: #selector(myTargetFunction), for: .touchDown)
This is the function:
func myTargetFunction() {
print("It works!")
}