Question

我的json响应是

 {
     "success" : "1",
      "totalpage" : "2",
      "blogdata" : [
         {
          "int_glocode" : "18",
          "var_blogtitle" : "ssss",
          "tblogdescription" : "ssssss",
          "var_images" : "http//url",
          "dt_creatdate" : "21-8-2017",
          "flag" : "false"
         }
        {
          "int_glocode" : "19",
          "var_blogtitle" : "ssss",
          "tblogdescription" : "ssssss",
          "var_images" : "http//url",
          "dt_creatdate" : "21-8-2017",
          "flag" : "false"
         }
      ]
    }

我的代码是这个。我在这段代码中使用alamofire和swiftyjson

 struct Data:Decodable {
 var var_image: String
 var tblogdescription : String
 var var_blogtitle: String

 init(blogdata:[String:Any]) {
 self.var_blogtitle = blogdata["var_blogtitle"] as! String
 self.tblogdescription = blogdata["tblogdescription"] as! String
 self.var_image = blogdata["var_image"] as! String

  }
}

我采用此数组来存储数据

 var datadetail = [Data]()

然后我的json部分是这个

Alamofire.request("url", method: .post, parameters: ["API":"get_blog_list","user_id":"18","page":"1"], encoding: URLEncoding.default).responseJSON { (response) in

 guard let datastring = response.result.value else { return }

        if let data = datastring as? [String: Any] {
            if let data1 = data["blogdata"] as? [[String:Any]] {
                for data2 in data1 {
                    if let data3 = data2 as? [String: Any] {
                        let var_blogtitle = data3["var_blogtitle"] as? String
                        let var_image = data3["var_image"] as? String
                        let tblogdescription = data3["tblogdescription"] as? String

                       self.datadetail.append(Data(blogdata: tblogdescription))
                        self.datadetail.append(Data(blogdata: var_image))
                        self.datadetail.append(Data(blogdata: var_blogtitle))
                    }
                    else{
                        print("Error")
                    }
                }
            }
        }
    }
}

我想将var_blogtitle，var_image，tblogdescription的数据输入到结构中，以便将数据显示到表视图中。我尝试此代码，我得到了答复。我得到了var_blogtitle，var_image，tblogdescription数据，但在附加部分中出现了错误。我认为我的结构部分是错误的。请帮帮我。
预先谢谢你。

Answer 1

更改您的结构名称

struct Values:Decodable {
 var var_image: String
 var tblogdescription : String
 var var_blogtitle: String

 init(blogdata:[String:Any]) {
 self.var_blogtitle = blogdata["var_blogtitle"] as! String
 self.tblogdescription = blogdata["tblogdescription"] as! String
 self.var_image = blogdata["var_image"] as! String

  }
}

和

Alamofire.request("url", method: .post, parameters: ["API":"get_blog_list","user_id":"18","page":"1"], encoding: URLEncoding.default).responseJSON { (response) in

 guard let datastring = response.result.value else { return }

        if let data = datastring as? [String: Any] {
            if let data1 = data["blogdata"] as? [[String:Any]] {
                for data2 in data1 {
                    if let data3 = data2 as? [String: Any] {

                       self.datadetail.append(Values(blogdata: data3))
                    }
                    else{
                        print("Error")
                    }
                }
            }
        }
    }
}

tableview部分是这个

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return datadetail.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
     let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! detailsTableViewCell

     let value = datadetail[indexPath.row]
    cell.descriptionlabel.text = value.tblogdescription
    cell.titlelabel.text = value.var_blogtitle



    return cell
}

Answer 2

如果您不确定自己的api是否有价值，请始终设置为可选

<mat-form-field> 
    <mat-select formControlName="productId" matInput placeholder="Product" #productId required>
        <mat-option *ngFor="let a of productArray" value="{{ a._id }}" (click)="getPrice(i, a.productPrice, a.productQuantity); getTotal(i)">{{ a.productName }}</mat-option>
    </mat-select>
</mat-form-field>

如果仍然出现错误，请编辑问题并显示错误

Answer 3

使用以下格式的结构进行响应。如果不确定是否每次都会出现这些属性，请将其保留为可选。

struct Response: Decodable {
    var success: String
    var totalpage: String
    var blogdata: [BlogData]
}

struct BlogData: Decodable {
    var int_glocode: String
    var var_blogtitle: String?
    var tblogdescription: String?
    var var_images: String?
    var dt_creatdate: String?
    var flag: String
}

只需将您的Response模式中的响应解析为：

var responseModal = Response()
if let data = response.result.value as? [String: Any] {
    do {
        let jsonData = try JSONSerialization.data(withJSONObject: data, options: .prettyPrinted)
        responseModal = try JSONDecoder().decode(Response.self, from: jsonData)
    } catch {
        print(error)
    }
}

如何在结构中获取数据

3 个答案: