【问题标题】:how to get web services data from url?如何从 url 获取 web 服务数据?
【发布时间】:2017-08-02 06:18:42
【问题描述】:

在这个网络服务中,我需要获取数据并按照image 中的说明显示网址是

 let url = "http://www.json-generator.com/api/json/get/cwqUAMjKGa?indent=2"
    var detailsArray :[[String: AnyObject]] = []
    var titleName = [String]()
    var productName = [String]()
    var children = [String]()
    var childrenArray :[[String: AnyObject]] = []
    var productsArray :[[String:AnyObject]] = []
    var name = [String]()

    func downloadJsonWithURL() {
        let url = NSURL(string: self.url)
        URLSession.shared.dataTask(with: (url as URL?)!, completionHandler: {(data, response, error) -> Void in
            if let jsonObj = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary {
                self.detailsArray = (jsonObj!.value(forKey: "data") as? [[String: AnyObject]])!
                print(self.detailsArray)
                for item in self.detailsArray{
                    if let detailDict = item as? NSDictionary {
                        if let name = detailDict.value(forKey: "name"){
                            self.titleName.append(name as! String)
                            print(self.productName)
                        }
                    self.childrenArray = (detailDict.value(forKey: "children") as? [[String : AnyObject]])!
                    print(self.childrenArray)
                    }
                }
                OperationQueue.main.addOperation({
                    print(self.productName)
                    print(self.titleName)
                    print(self.name)
                })
            }
        }).resume()
    }

【问题讨论】:

  • 您收到网络服务的响应了吗?
  • 我能够得到,但是否可以将它传递给表格视图,就像我在上面的图片@KKRocks 中显示的那样
  • 只有一些我得到的数据,后来它会崩溃@KKRocks
  • 你能告诉我你的应用在哪里崩溃了吗?

标签: ios json swift3


【解决方案1】:

试试这个:

self.detailsArray = (jsonObj.value(forKey: "data") as? [[String: AnyObject]])!
      print(self.detailsArray)
      for item in self.detailsArray{
        if let detailDict = item as? [String : AnyObject] {
          if let name = detailDict["name"]{
            self.titleName.append(name as! String)
            print(self.productName)
          }
          if let dictChildren = detailDict["children"]{
        if ((dictChildren as? [Any]) != nil){
          self.childrenArray = dictChildren as! [[String : AnyObject]];
        }
        print(self.childrenArray)

      }
  }

【讨论】:

  • 我得到对象成功。
  • @vamsi 试试我的答案。
  • 在子数组中它在 nslog @KKRocks 中显示为空
  • 是的,因为作为响应,儿童数组不会出现
  • 那么如何在子数组@KKRocks 中获取数据
【解决方案2】:

我已经尝试了您的代码,并且以下解决方案正在运行。

func downloadJsonWithURL() {
    let url = NSURL(string: self.url)
    URLSession.shared.dataTask(with: (url as URL?)!, completionHandler: {(data, response, error) -> Void in
        if let jsonObj = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary {
            self.detailsArray = (jsonObj!.value(forKey: "data") as? [[String: AnyObject]])!
            print(self.detailsArray)
            for item in self.detailsArray{
                if let detailDict = item as? [String:AnyObject] {
                    if let name = detailDict["name"]{
                        self.titleName.append(name as! String)
                        print(self.productName)
                    }
                    self.childrenArray = (detailDict["children"]as? [[String : AnyObject]])!
                    print(self.childrenArray)
                }
            }
            OperationQueue.main.addOperation({
                print(self.productName)
                print(self.titleName)
                print(self.name)
            })
        }
    }).resume()
}

【讨论】:

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