I am looking for a way to refer to the IBOutlet variable in a custom class UIView, from another class. I found layoutSubviews, but each change only works on the first call, and not on each subsequent call. Thanks for help!
ViewController class:
var SB = StatusBar()
SB.update(1)
SB.update(2)
SB.update(3)
StatusBar class:
class StatusBar: UIView {
#IBOutlet var view: UIView!
#IBOutlet weak var label: UILabel!
var ActualStatus: Int!
required init?(coder: NSCoder) {
super.init(coder: coder)
xibSetup()
}
override init(frame: CGRect) {
super.init(frame: frame)
xibSetup()
}
func update(status) {
ActualStatus = status
self.layoutSubviews()
}
override func layoutSubviews() {
super.layoutSubviews()
label.text = ActualStatus
}
func xibSetup() {
view = loadViewFromNib()
view.frame = bounds
view.autoresizingMask = [UIView.AutoresizingMask.flexibleWidth, UIView.AutoresizingMask.flexibleHeight]
addSubview(view)
}
func loadViewFromNib() -> UIView {
let bundle = Bundle(for: type(of:self))
let nib = UINib(nibName: "StatusBar", bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
return view
}
}
Result: label.text is 1, change only works on the first call
Related
Why in the code below, text changes as value, but there is no change in UIVIew. How do I refresh the data in a custom class? The value changes but does not refresh in the view. I have no ideas anymore.
ViewController.swift:
let SB = StatusBar()
SB.update()
StatusBar.swift:
class StatusBar: UIView {
#IBOutlet var view: UIView!
#IBOutlet weak var Status: UITextField!
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
xibSetup()
}
override init(frame: CGRect) {
super.init(frame: frame)
xibSetup()
}
func update() {
Status.text = "ok"
print(Status.text)
print("status updated.")
}
func xibSetup() {
view = loadViewFromNib()
view.frame = bounds
view.autoresizingMask = [UIView.AutoresizingMask.flexibleWidth, UIView.AutoresizingMask.flexibleHeight]
addSubview(view)
}
func loadViewFromNib() -> UIView {
let bundle = Bundle(for: type(of:self))
let nib = UINib(nibName: "StatusBar", bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
return view
}
}
You are not calling update(). In xibSetup(), add update()
I have the following swift file which controls a xib file
import UIKit
protocol SelectProfile: class {
func selectionUp(id: Int, selected: Bool)
}
class Component: UIView {
#IBOutlet weak var name: UILabel!
#IBOutlet weak var selection: UIView!
var selected: Bool = false
var profileId: Int = 6
weak var delegate: SelectProfile?
#IBAction func selProfile(_ sender: Any) {
selected = !selected
selection.isHidden = !selected
delegate?.selectionUp(id: profileId, selected: selected)
}
let nibName = "Component"
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
func commonInit() {
guard let view = loadViewFromNib() else { return }
view.frame = self.bounds
self.addSubview(view)
selection.isHidden = true
name.text = String(profileId)
}
func loadViewFromNib() -> UIView? {
let nib = UINib(nibName: nibName, bundle: nil)
return nib.instantiate(withOwner: self, options: nil).first as? UIView
}
}
In my UIViewController where I want to interact with the component I have the following code (shortened for brevity)
import UIKit
class Home: UIViewController, SelectProfile {
#IBOutlet weak var profileComponent: Component!
func selectionUp(id: Int, selected: Bool) {
print(id, selected)
}
override func viewDidLoad() {
profileComponent.delegate = self
profileComponent.profileId = 2
}
}
My delegate works nicely and I'm able to change the values for IBOutlets but I can't pass a value to variables. This line doesn't pass the data to my xib profileComponent.profileId = 2.
It seems like I have an issue with initialization of the xib but I don't know how to fix it.
The viewDidLoad of controller is called after view's init, so when you change profileId as you do, it is changed, but not reflected anywhere.
I assume the following, at least, missed:
var profileId: Int = 6 {
didSet {
name.text = String(profileId)
// call delegate here if needed as well
}
}
I've seen a number of similar questions, but many aren't up-to-date, and none have fixed my issue.
I have a custom Xib and class, CardView. When I try to instantiate it in code, I get Could not cast value of type 'UIView' to 'CardView'.
Class is as follows:
class CardView: NibView {
#IBOutlet var contentView: UIView!
#IBOutlet weak var wordLabel: UILabel!
#IBOutlet weak var flipButton: UIButton!
#IBOutlet weak var playButton: UIButton!
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
private func commonInit() {
Bundle.main.loadNibNamed("CardView", owner: self, options: nil)
addSubview(contentView)
contentView.frame = self.bounds
contentView.autoresizingMask = [.flexibleHeight, .flexibleWidth]
}
override func awakeFromNib() {
super.awakeFromNib()
}
}
and NibView is a custom superclass and looks like:
class NibView: UIView {
var view: UIView!
override init(frame: CGRect) {
super.init(frame: frame)
// Setup view from .xib file
xibSetup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
// Setup view from .xib file
xibSetup()
}
}
private extension NibView {
func xibSetup() {
backgroundColor = UIColor.white
view = loadNib()
// use bounds not frame or it'll be offset
view.frame = bounds
// Adding custom subview on top of our view
addSubview(view)
view.translatesAutoresizingMaskIntoConstraints = false
addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|[childView]|",
options: [],
metrics: nil,
views: ["childView": view]))
addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[childView]|",
options: [],
metrics: nil,
views: ["childView": view]))
}
}
extension UIView {
/** Loads instance from nib with the same name. */
func loadNib() -> UIView {
let bundle = Bundle(for: type(of: self))
let nibName = type(of: self).description().components(separatedBy: ".").last!
let nib = UINib(nibName: nibName, bundle: bundle)
return nib.instantiate(withOwner: self, options: nil).first as! UIView
}
}
Here is a screenshot of my file inspector showing that I set the File's Owner custom class to CardView, which seems to be a stumbling block for many
Finally, I try to instantiate the CardView as follows: CardView().loadNib() as! CardView
In case someone still having this problem, I have the same problem and I think we follow same tutorial.
You have called loadNib() in your xibSetup(). I think you don't have to call it again.
So instead of using
let myCardView = CardView().loadNib() as! CardView
I just use
let myCardView = CardView()
In your UIViewController, when you create an instance of your CardView, instead of casting it like CardView().loadNib() as! CardView, you call the function object_setClass(_, _) to avoid that error (from Xcode 9).
So it should be like:
let myCardView = CardView().loadNib
object_setClass(myCardView, CardView.self)
view.addSubview(myCardView)
Old question, but in case anyone's here:
My problem was that the view subclass was fileprivate. IB doesn't like that apparently.
For me loading xib programmatically in this way doesn’t work. I had to remove File owner’s class name and set that to the class name of first view. And then I had to set outlets to the components which I’m going to use.
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
}
override init(frame: CGRect) {
super.init(frame: frame)
}
Added to custom view class after outlets. For you it's CardView. Then I loaded that view class like
let viewCard = Bundle.main.loadNibNamed("CardView", owner: self, options: nil)?.first as! CardView
view.addSubview(viewCard)
How do I work with a Label that hangs on a xib?
lblName.text = "Label Text"
I am getting error associated with
unexpectedly found nil while unwrapping an Optional value
You should update your custom View class in the following way.
First of all, open View.xib file set File's Owner custom class to View like the image in given below
after set UILabel IBOutlets like the image given below
After that open View.swift file and paste the code given below
class View: UIView {
private var view: UIView!
#IBOutlet weak var name: UILabel!
#IBOutlet weak var firstname: UILabel!
override init(frame: CGRect) {
super.init(frame: frame)
xibSetup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
xibSetup()
}
//FIXME:- Set up
func xibSetup() {
view = loadViewFromNib()
view.frame = bounds
view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
addSubview(view)
}
func loadViewFromNib() -> UIView {
let bundle = Bundle(for: type(of: self))
let nib = UINib(nibName: "View", bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
return view
}
}
Now you can variable of View class in ViewController.
I have created a .xib and adding this xib to another view. I want to add a delegate method in that .xib file. Here is my code :
.xib file
import UIKit
protocol CustomCheckBoxWithCrossDelegate {
func deleteCustomCheckbox(itemToDelete: String)
}
class CustomCheckBoxWithCross: UIView {
#IBOutlet weak var radioButton: UIButton!
#IBOutlet weak var checkboxLbl: UILabel!
#IBOutlet weak var checkboxCrossBtn: UIButton!
var blockIndexForTheCrossButton: Int = 0
var delegate: CustomCheckBoxWithCrossDelegate!
override init(frame: CGRect) {
super.init(frame: frame)
loadViewFromNib ()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
loadViewFromNib ()
}
func loadViewFromNib() {
let bundle = NSBundle(forClass: self.dynamicType)
let nib = UINib(nibName: "CustomCheckBoxWithCross", bundle: bundle)
let view = nib.instantiateWithOwner(self, options: nil)[0] as! UIView
view.frame = bounds
view.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
self.addSubview(view);
}
#IBAction func crossBtnTapped(sender: AnyObject) {
print("Delegate --> \(delegate)")
delegate!.deleteCustomCheckbox("hello")
}
}
But in "crossBtnTapped" method I am getting nil value for that delegate.
can anyone please tell me what I am doing wrong?
You must have the instance of CustomCheckBoxWithCross in your other class, where you have implemented the protocol. Set delegate property of CustomCheckBoxWithCross instance to self in that file.
I ran to this error several times before, add if delegate is not nil condition.
#IBAction func crossBtnTapped(sender: AnyObject) {
if delegate != {
delegate!.deleteCustomCheckbox("hello")
}
}