带有 UICollectionView 的 xib - 不符合键值编码

Question

I have a Custom UIView with an XIB. This custom UIView has a UICollectionView which is connected to an IBOutlet . In the view setup, the UICollectionView is initialised properly and is not nil.

However in the cellForItemAtIndexPath method, I get this error:-

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key selectorCollectionView.'

If I remove the datasource and delegate, I do not get any error. If I add them Iget an error at this line:-

let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "selectorCell", for: indexPath) as! SelectorCell

Please help!

Edit: I have attached screenshots of my setup

I have uploaded the project here too http://www.fast-files.com/getfile.aspx?file=148623

Answer 1

Maybe a sync issue. Happens sometimes:

1. Try cut outlets loose and reconnect them.

2. Make sure Collection Reusable View identifier is defined in xib file:

3. Make sure collection-view cell's custom class is define in xib file:

EDIT: I dug into your project and here are my findings

UICollectionView should be init' in awakeFromNib method (override it):

override func awakeFromNib() {
    super.awakeFromNib()
    let cellNib = UINib(nibName: String(describing: "SelectorCell"), bundle: nil)
    selectorCollectionView.register(cellNib, forCellWithReuseIdentifier: "selectorCell")
    selectorCollectionView.dataSource = self
    selectorCollectionView.delegate = self
}

loadViewFromNib should be looking like this (Remove collection view init'):

func loadViewFromNib() -> UIView {
    let nib = UINib(nibName: "SelectorView", bundle: nil)
    let view = nib.instantiate(withOwner: self, options: nil).first as! UIView
    return view
}

Subclass SelectorTableViewCell likewise.

class SelectorTableViewCell: UITableViewCell {
    @IBOutlet weak var selectorView: SelectorView!
}

In Main.storyboard - custom class UITableViewCell to SelectorTableViewCell and connect SelectorView inside contentView to 'SelectorTableViewCell''s outlet.

That's it i think. Here is the project:

Answer 2

You can try the following:

1. Click on File Owner at the left panel of YourCell.xib . Then go to Attributes inspector and check whether there is any class specified in Class field. If not - no help from me here. If yes - remove it and tap Enter .

2. In YourCell.xib sequentially click on all subviews and delete all the outlets in Connections Inspector . No need to delete them in YourCell.swift .

3. Once your cell's File Owner and outlets are removed, we're ready to reconnect the outlets. Just drag every one as usually to an existing corresponding IBOutlet in YourCell.swift .

As a result, when you click on YourCell at the left panel of YourCell.xib and go to Connections Inspector , you'll see there are all the outlets connected. Like so:

And if you check connections for a particular view in YourCell , you should see that it's outlet is connected to YourCell ( StaticSlot in my case).

This helped me and hope you'll get the same.

Answer 3

In our case, the problem was making the wrong connection in Storyboard. Click on the custom class in Storyboard -- not the File Owner -- then connect the IB outlet to the variable in the custom class.

Answer 4

if try to register you custom class and cell ID

self.collectionView.register(nib, forCellWithReuseIdentifier: "Cell")
self.collectionView.register(CustomClassCell.self, forCellWithReuseIdentifier: "Cell")