ios - 如何取消Set <AnyCancellable>中的某个特定AnyCancellable？

Question

我有一个URLSession.shared.dataTaskPublisher，我将其存储在AnyCancellable -s中。当我收到一个值并完成后，我希望将此AnyCancellable从集合中删除。

如何识别此特定AnyCancellable，以及如何将其删除？或处理这些案件的最佳方法是什么？我检查了一下，一旦收到完成值，它不会自动从包中取出。

class RandomClass {
    private var cancellableBag: Set<AnyCancellable>()

    func someMethod() {
        let request = URLRequest(...)
        URLSession.shared.dataTaskPublisher(for: request)
            .sink(...)
            .store(in: &self.cancellableBag)
    }
}

Answer 1

这是可能的方法。经过Xcode 11.4测试

class RandomClass {
    private var cancellableBag = Set<AnyCancellable>()

    func someMethod() {
        let request = URLRequest(...)

        var cancellable: AnyCancellable? = nil
        cancellable = URLSession.shared.dataTaskPublisher(for: request)
            // .. other operators here
            .sink(receiveValue: {[weak self] value in
                // ... process value here
                self?.cancellableBag.remove(cancellable!)  // << remove !!
            })
        self.cancellableBag.insert(cancellable!)     // << store !!
    }