How to solve Swift warning: "Constant 'value' inferred to have type 'AnyClass?' (aka 'Optional<AnyObject.Type>'), which may be unexpected"?

user_1792699 0
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Can't figure out why the compiler throws this warning

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Any idea how to solve it?

func configure(with classesReuseRegistry: [String: AnyClass?]) {
    var collectionView = UICollectionView() // Temp collection var for testing purposes
    
    for (key, value) in classesReuseRegistry {
        collectionView.register(value, forCellWithReuseIdentifier: key)
    }
}

I also want to clarify, this warning was not present before. I had similar code on this library and it was never a problem.

swift xcode compiler-warnings ios
1 Answers

You can silence the warning by modifying your code to:

func configure(with classesReuseRegistry: [String: AnyClass?]) {
    var collectionView = UICollectionView() // Temp collection var for testing purposes
    
    for classDict in classesReuseRegistry {
        collectionView.register(classDict.value, forCellWithReuseIdentifier: classDict.key)
    }
}

I think that the warning is caused by having AnyClass, which is a type alias, as dictionary value, and not a value type like Int, String, ...

user_132112630
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