ios - 使用 Alamofire 更改标签

Question

我想把我从API获取的信息放到对应的Label里面，我用Alamofire获取API的信息并把对应的Label放到里面，但是我发现我的Label文字没有变，would like请问发生这种情况是什么问题？谁能替我解答一下？谢谢

这是我的 Information 类:

import Foundation
import Alamofire
class Information {
    var account:String?
    var date:String?
    var name:String?
    var sex:String?
    var born:String?
    var phoneNumber:String?
    var email:String?

    init(account:String,date:String,name:String,sex:String,born:String,phoneNumber:String,email:String) {
        self.account = account
        self.date = date
        self.name = name
        self.sex = sex
        self.born = born
        self.phoneNumber = phoneNumber
        self.email = email
    }

    typealias DownlaodComplete = () -> ()



    func downlaodInformation(completion:@escaping DownlaodComplete) {
        Alamofire.request("http://163.18.22.78:81/api/Information/A1001a").responseJSON { response in
             print(response)
            if let json = response.result.value as? Dictionary<String,Any> {
                guard let account = json["Account"] as? String ,let date = json["Date"] as? String , let name = json["Name"] as? String , let sex = json["Sex"] as? String , let born = json["Born"] as? String , let phoneNumber = json["PhoneNumber"] as? String , let email = json["Email"] as? String   else {
                    return
                }
                self.account = account
                self.date = date
                self.name = name
                self.sex = sex
                self.born = born
                self.phoneNumber = phoneNumber
                self.email = email
                completion()
            }

        }
    }

}

这是我的ViewController:

   var information:Information?

    override func viewDidLoad() {
        super.viewDidLoad()
        if let currentInformation = information {
            currentInformation.downlaodInformation {
                self.accountLabel.text = currentInformation.account
                self.dateLabel.text = currentInformation.date
                self.nameLabel.text = currentInformation.name
                self.sexLabel.text = currentInformation.sex
                self.bornLabel.text = currentInformation.born
                self.phoneNumberLabel.text = currentInformation.phoneNumber
                self.emailLabel.text = currentInformation.email

            }
        }

Answer 1

您需要使用您的完成 block ，只要 Alamofire 完成数据请求，它就会被调用。你也可以改进你的代码，例如有一个 onCompletion block 传递一个 Information 对象和一个 onError block 来显示，如果你有任何错误。示例如下:

func downlaodInformation(parameterOne: String, parameterTwo: Int, onCompletion: @escaping (Information) -> Void, onError: @escaping(NSError)  -> Void) {
    Alamofire.request("http://163.18.22.78:81/api/Information/A1001a").responseJSON { response in
        if let json = response.result.value as? Dictionary<String,Any> {
            let account = json["Account"] as? String
            let date = json["Date"] as? String
            let name = json["Name"] as? String
            let sex = json["Sex"] as? String
            let born = json["Born"] as? String
            let phoneNumber = json["PhoneNumber"] as? String
            let email = json["Email"] as? String

            let information = Information(account: account, date: date, name: name, sex: sex, born: born, phoneNumber: phoneNumber, email: email)
            onCompletion(information)
        } else {
            onError(NSError(domain: "Error while getting data", code: 0, userInfo: nil))
        }
    }
}

用法:

downlaodInformation(parameterOne: "someParam", parameterTwo: 123, onCompletion: { (currentInformation) in
    print(currentInformation.account)
    self.accountLabel.text = currentInformation.account
    self.dateLabel.text = currentInformation.date
    self.nameLabel.text = currentInformation.name
    self.sexLabel.text = currentInformation.sex
    self.bornLabel.text = currentInformation.born
    self.phoneNumberLabel.text = currentInformation.phoneNumber
    self.emailLabel.text = currentInformation.email
}) { (error) in
    print(error.domain)
}