Question 240646 in IOS Swift Question posted in
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Ios swift – Cannot assign to property: 'self' is immutable error

private let selectedPhotos = BehaviorRelay<[PHAsset]>(value: [])

private lazy var completeButton = UIBarButtonItem(title: "확인",
                                                      style: .plain,
                                                      target: nil,
                                                      action: nil)

A variable is declared.

private func bind() {
        selectedPhotos.asObservable()
            .map { $0.isEmpty } 
            .bind(to: completeButton.rx.isHidden)
            .disposed(by: disposeBag)
    }

"Cannot assign to property: ‘self’ is immutable"
I got this error

"completeButton.rx.isHidden" is underlined.

These codes are written in class

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2

Answers


  1. Chosen as BEST ANSWER
    0

    I solved it thanks to you. UIBarButtonItem supports isHidden from 16.0. But I am wondering why this error occurs enter image description here

    Originally, I know that this error occurs enter image description here


  2. 0

    as you mentioned

    private let selectedPhotos = BehaviorRelay<[PHAsset]>(Value: [])

    is declared as a let constant.

    Use var instead.

    If it’s declared inside a viewController (that is a class of course) this way it should become mutable.

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