Question

我是iOS开发新手，使用的是swift语言。在我的应用程序中，我使用Alamofire 2网络库来调用rest api。现在我想动态填充uipickerview，我正在调用这个Web服务并将响应作为json数组

[
 {
    duration = "2017 - 2018";
    year = 2017;
 }
 {
    duration = "2016 - 2017";
    year = 2016;
 }
 {
    duration = "2015 - 2016";
    year = 2015;
 }
]

现在我想用“持续时间”数据填充uipickerview，我已经完成了各种示例，但无法理解如何执行此操作。任何帮助表示赞赏。

Swift代码：

 func getYear()
{
    url = baseUrl + "/foo/bar"
    Alamofire.request(.GET, url , parameters: ["foo": foo,"bar":bar])
        .responseJSON(){
    (_,_,result)
            in
            print("get year list result ",result)

            switch result {
            case .Success(let JSON):
                print("Success with JSON: \(JSON)")
                let jsonData = JSON as! NSDictionary
                let duration = jsonData.objectForKey("duration")
                print("duration ",duration)

            case .Failure(let data, let error):
                print("Request failed with error: \(error)")

                if let data = data {
                    print("Response data: \(NSString(data: data, 
                    encoding: NSUTF8StringEncoding)!)")
                }
            }

    }

}

控制台消息

get year list result  SUCCESS
Success with JSON: 
(
        {
        duration = "2017 - 2018";
        year = 2017;
    }
)

Getting this error
Could not cast value of type '__NSCFArray' (0x394c92d0) to 'NSDictionary' (0x394c93c0).

谢谢

Answer 1

将数据解析为数组： -

yourModel : NSObject {
var duration: String?
var year : String?
}

假设：yourArray = [yourModel]()

func numberOfComponents(in pickerView: UIPickerView) -> Int {
      return 1
}

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
     return yourArray.count
}

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
     if yourArray.count > 0 {
        return yourArray[row].duration
    }
 }

ios swift 2如何使用json数据填充uipickerview

1 个答案: