ios - Swift 4 对成员 'jsonObject(with:options:)' 的引用不明确

Question

尝试设置执行网络请求并尝试序列化响应的单元测试。我当前收到错误:对成员“jsonObject(with:options:)”的引用不明确。很困惑为什么会发生这种情况，因为单元测试应该知道什么是 JSONSerialization。是？

func testAccessKeys() {
    let expected = expectation(description: "Run the Access request")
    sut.request(.Access, data: nil) { finished, response in
        if response != nil && finished == true {
            guard let json = try? JSONSerialization.jsonObject(with: response!, options: .mutableContainers) as! [String:Any] else { return XCTFail("Access request was not a dictionary")}
            XCTAssertNotNil(json?["id"])
            expected.fulfill()
        } else {
            XCTFail("Access response was nil")
        }
    }
    waitForExpectations(timeout: 3) { error in
        if let error = error {
            XCTFail("Access request failure: \(error)")
        }
    }

}

Answer 1

确保响应的类型为Data 或InputStream。

这些是此函数唯一接受的类型，如 documentation 中所示。