Swift create Custom View from Nib

Question

I try to implement Custom Loader View with Nib file. But I get an error in loadViewFromNib() at

return nib.instantiate(withOwner: self, options: nil).first as? UIView.

Thread 1: EXC_BAD_ACCESS (code=2, address=0x7ffee6f3df98)

open class LoaderView: UIView {

@IBOutlet var loaderImage: UIImageView!    
@IBOutlet var contentView: UIView!

func xibSetup() {
    contentView = loadViewFromNib()
    contentView.frame = bounds
    contentView.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
    addSubview(contentView)
}

required public init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    xibSetup()
}

override init(frame: CGRect) {
    super.init(frame: frame)
    xibSetup()
}

func loadViewFromNib() -> UIView? {
    let bundle = Bundle(for: type(of: self))
    let nib = UINib(nibName: "LoaderView", bundle: bundle)
    return nib.instantiate(withOwner: self, options: nil).first as? UIView
}
}

I call this loader in VC in viewDidLoad() as

let loader = LoaderView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
view.addSubview(loader)

Make sure You have set class `LoaderView` in XIB's FilesOwner — Prashant Tukadiya, Jul 05 '18 at 09:01

Prashant Tukadiya · Accepted Answer · 2018-09-26T04:27:39.347

4

Your code is fine there is no recursion

Please make sure you have

1) Double check your IBOUtlet connection

2) Added Your class in File's Owner

I have created This same as your code

class CustomView: UIView {

    let nibName = "CustomView"
    @IBOutlet var view : UIView!

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        xibSetUp()
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        xibSetUp()
    }

    func xibSetUp() {
        view = loadViewFromNib()
        view.frame = self.bounds
        view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
        addSubview(view)
    }

    func loadViewFromNib() -> UIView {

        let bundle = Bundle(for: type(of: self))
        let nib = UINib(nibName: "CustomView", bundle: bundle)
        return nib.instantiate(withOwner: self, options: nil).first as! UIView

    }

}

Have look at output

edited Sep 26 '18 at 04:27

answered Jul 05 '18 at 09:18

Prashant Tukadiya

15,838
4
62
98

I am sure about that the IBOutlet and Xib connection in Files Owner. Your code is same. But still not working. I dont use storyboard for VC. Is there any problem at there ?. – Ali Ural Jul 05 '18 at 10:03
@AliUral Make sure your xib is added In target membership (Build phase check copy bundle resource). Also Clean derived data + clean project or restart xcode – Prashant Tukadiya Jul 05 '18 at 10:06
I added an image – Ali Ural Jul 05 '18 at 10:10
@AliUral That's wrong !! , Remove Loader from there and add to File's owner , Check yellow box top on it where file's owner written – Prashant Tukadiya Jul 05 '18 at 10:12
Thanks Dude . The problem is solved. But can you explain why we put in there. Normally when I create a Xib File , I decleare class name from Element not File's Owner. Is it wrong ? – Ali Ural Jul 05 '18 at 10:20
@AliUral Check this https://stackoverflow.com/questions/15150713/confused-difference-between-custom-class-for-an-object-and-for-the-files-owner – Prashant Tukadiya Jul 05 '18 at 10:30
2

Thanks bro. I give ur star :) – Ali Ural Jul 05 '18 at 10:31

Alexey Kudlay · Answer 2 · 2018-07-05T09:35:38.143

2

You have recursion in

required public init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    xibSetup()
}

You call loadViewFromNib() in xibSetup(), it call UINib(nibName: "LoaderView", bundle: bundle), that call required public init?(coder aDecoder: NSCoder)

developer.apple.com

edited Jul 05 '18 at 09:35

answered Jul 05 '18 at 08:58

Alexey Kudlay

525
2
14

That's not true – Prashant Tukadiya Jul 05 '18 at 09:12
@Prashant Tukadiya Why? Most likely, the hierarchy of views is broken. – Alexey Kudlay Jul 05 '18 at 09:17
Nope `public init?(coder aDecoder: NSCoder)` will call when it is being initiated from storyboard like when you have view in storyboard and assign a class LoaderView. And Important thing is `instantiate(withOwner: self, options: nil)` will never call `public init?(coder aDecoder: NSCoder)` – Prashant Tukadiya Jul 05 '18 at 09:21

Swift create Custom View from Nib

2 Answers2