Xcode：领域线程问题

Question

我是 IOS 开发新手，最近尝试过realm 问题是，我必须从 json 文件中获取 url，然后我将这些 url 作为一个对象放在领域中……每当我再次启动我的应用程序时，URL 变量都会从领域中获取受尊重的 url…… 像这样：

getUrls()

    let realm = try! Realm()
    // Query Realm for all dogs less than 2 years old
    let urls = realm.objects(UrlCollector.self).first
    let sss = realm.objects(UrlCollector.self)
    print("no of objects in did load \(sss.count)")
    loginUrl = urls!.login
    print("login url inside didload \(loginUrl)")

但问题是 getUrls 方法...它使用 almofire 更新 url

getUrls方法：

Alamofire.request("<<<myurl>>>", method: .post, encoding: JSONEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in

            switch(response.result) {
            case .success(_):
                if let data = response.result.value{
                   print(data)

                        let data = JSON(data)

                        for item in data["result"].arrayValue {

                            let url = UrlCollector()
                            url.login = "\(self.server)\(item["login"].stringValue)"
                            print(url.login)
                            url.changePassword = "\(self.server)\(item["changePassword"].stringValue)"
                             print(url.changePassword)
                            url.phoneNumberVerify = "\(self.server)\(item["phoneNumberVerify"].stringValue)"
                             print(url.phoneNumberVerify)
                            url.sessionCheck = "\(self.server)\(item["sessionCheck"].stringValue)"
                             print(url.sessionCheck)
                            // Get the default Realm
                            let realm = try! Realm()

                            var urls = realm.objects(UrlCollector.self)
                            // Persist your data easily
                            try! realm.write {

                                realm.delete(urls)
                                realm.add(url)
                        }

                            // Query Realm for all dogs less than 2 years old
                            urls = realm.objects(UrlCollector.self)
                            print(urls.count)
                    }
                }

                break

            case .failure(_):
                print("Error message:\(response.result.error)")
                break

            }
        }
    }

此代码在确实加载时运行

我的日志：

no of objects in did load 1
login url inside didload 
{
    result =     (
                {
            changePassword = "/iust_app/android/passwordChange.php";
            login = "/iust_app/android/login.php";
            phoneNumberVerify = "/iust_app/android/onNumberVerification.php";
            sessionCheck = "/iust_app/android/sessionCheck.php";
        }
    );
}
/iust_app/android/login.php
/iust_app/android/passwordChange.php
/iust_app/android/onNumberVerification.php
/iust_app/android/sessionCheck.php
1




print("no of objects in did load \(sss.count)")
    loginUrl = urls!.login
    print("login url inside didload \(loginUrl)")

您可以在请求之前看到这些运行...请阅读我的日志行以了解

Answer 1

所有网络请求都是异步执行的。如果您希望在收到服务器响应后执行您的代码，请将其放入此请求的完成处理程序中。