Swift 使用 API “快速”？答案

【问题标题】：Swift working with API "to fast"?Swift 使用 API “快速”？
【发布时间】：2014-10-22 14:00:12
【问题描述】：

我目前正在为一个小应用程序使用英雄联盟 API - 它要求我一个接一个地发送一些请求，但目前我遇到了问题。首先是我的代码

import UIKit

var summonorname:String = ""

class ViewController: UIViewController {
    var SummonorID = ""


    @IBOutlet weak var Input: UITextField!
    @IBAction func SubmitBT(sender: AnyObject) {
        summonorname = Input.text
        println(summonorname)

        let urlpath_summonorID = "https://euw.api.pvp.net/api/lol/euw/v1.4/summoner/by-name/"+summonorname+"?api_key=12345-12345-12345-12345-12345"


        let url_summonorID = NSURL(string: urlpath_summonorID)
        let session_1 = NSURLSession.sharedSession()
        let task_1 = session_1.dataTaskWithURL(url_summonorID, completionHandler: {data,response, error -> Void in
            if (error != nil) {
                println(error)
            }else{
                let summonorID_JSON = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
                var ID_dict = summonorID_JSON["testsummonor"] as NSDictionary
                var SummonorID: AnyObject? = ID_dict["id"]
                println(SummonorID!)
            }
        })

        task_1.resume()

        let urlpath_summonorLeague = "https://euw.api.pvp.net/api/lol/euw/v2.5/league/by-summoner/"+self.SummonorID+"?api_key= 12345-12345-12345-12345-12345"
        println(urlpath_summonorLeague)

    }


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

第一个请求发送正常，我得到 JSON 并且可以解析它，但是

let urlpath_summonorLeague = "https://euw.api.pvp.net/api/lol/euw/v2.5/league/by-summoner/"+self.SummonorID+"?api_key=12345-12345-12345-12345-12345"
        println(urlpath_summonorLeague)

这部分被快速发送，所以它仍然缺少“self.SummonorID”，并且“self.SummonorID”在like之后打印：

OUTPUT
testsummonor
https://euw.api.pvp.net/api/lol/euw/v2.5/league/by-summoner/?api_key=12345-12345-12345-12345-12345
00000001

无论如何要解决这个问题，比如“让请求先返回”，然后进入下一步？

【问题讨论】：

标签： json rest web swift request

【解决方案1】：

您只在代码中启动了一项任务。如果您想在 completion 任务之后完成某些事情，请将其放入 completion handler。

【讨论】：

见下面的帖子，但这甚至不起作用（它给了我相同的输出）

【解决方案2】：

@蒙迪

import UIKit

var summonorname:String = ""

class ViewController: UIViewController {
    var SummonorID = ""


    @IBOutlet weak var Input: UITextField!
    @IBAction func SubmitBT(sender: AnyObject) {
        summonorname = Input.text
        println(summonorname)

        let urlpath_summonorID = "https://euw.api.pvp.net/api/lol/euw/v1.4/summoner/by-name/"+summonorname+"?api_key=12345-12345-12345-12345-12345"


        let url_summonorID = NSURL(string: urlpath_summonorID)
        let session_1 = NSURLSession.sharedSession()
        let task_1 = session_1.dataTaskWithURL(url_summonorID, completionHandler: {data,response, error -> Void in
            if (error != nil) {
                println(error)
            }else{
                let summonorID_JSON = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary
                var ID_dict = summonorID_JSON["testsummonor"] as NSDictionary
                var SummonorID: AnyObject? = ID_dict["id"]
                println(SummonorID!)
let urlpath_summonorLeague = "https://euw.api.pvp.net/api/lol/euw/v2.5/league/by-summoner/"+self.SummonorID+"?api_key= 12345-12345-12345-12345-12345"
        println(urlpath_summonorLeague)

            }
        })

        task_1.resume()


    }


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

【讨论】：