Wrapping the request -> result cycle into own adapter（請求- >結(jié)果周期包裝成自己的適配器）

看向一個真實世界的例子，你可能想把請求- >結(jié)果周期包裝成自己的網(wǎng)絡(luò)適配器，然后它變得更加容易響應(yīng)成功、錯誤、或者網(wǎng)絡(luò)失敗后的重連等等

struct Network {
    static let provider = MoyaProvider(endpointClosure: endpointClosure)

    static func request(
        target: MyService,
        success successCallback: (JSON) -> Void,
        error errorCallback: (statusCode: Int) -> Void,
        failure failureCallback: (MoyaError) -> Void
    ) {
        provider.request(target) { result in
            switch result {
            case let .success(response):
                do {
                    try response.filterSuccessfulStatusCodes()
                    let json = try JSON(response.mapJSON())
                    successCallback(json)
                }
                catch error {
                    errorCallback(error)
                }
            case let .failure(error):
                if target.shouldRetry {
                    retryWhenReachable(target, successCallback, errorCallback, failureCallback)
                }
                else {
                    failureCallback(error)
                }
            }
        }
    }
}

// usage:
Network.request(.zen, success: { zen in
    showMessage(zen)
}, error: { err in
    showError(err)
}, failure: { _ in
    // oh well, no network apparently
})

總結(jié) 這小節(jié)的核心:

1. 把Moya中的自己的請求-響應(yīng)過程自己在封裝一下，方便使用（只響應(yīng)結(jié)果）