使用Alamofire ObjectMapper映射到Swift对象的问题显示为零

本文介绍了使用Alamofire ObjectMapper映射到Swift对象的问题显示为零的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我是iOS和Swift开发环境的新手.我试图使用Alamofire提取JSON，使用AlamofireObjectMapper将检索到的JSON集合映射回我的Swift对象.

I m new to iOS and Swift development environment. I was trying to use Alamofire for pulling JSON and AlamofireObjectMapper for Mapping the retrieved JSON collections back to my Swift Object.

问题是我可以通过Alamofire请求获取JSON，并显示了计数，但映射部分似乎显示为nil.是我一直错过的事情.感谢帮助.

The issue is I m able to fetch the JSON thru Alamofire request and the count is shown, but the mapping part seems to be showing nil. Is something I had been missed out . Appreciate help.

import UIKit import CoreLocation import ObjectMapper class BranchObjectMapper : Mappable { // MARK: Properties var id: Int? var cityId: Int? var areaId: Int? var name: String? var nameAr: String? var branchAddr: String? var branchAddr2: String? var location: CLLocation? required init?(_ map: Map) { mapping(map) } func mapping(map: Map) { id <- map["id"] cityId <- map["cityId"] areaId <- map["areaId"] name <- map["name"] nameAr <- map["nameAr"] branchAddr <- map["branchAddr"] branchAddr2 <- map["branchAddr2"] location <- map["location"] } }

在viewDidLoad()

Alamofire.request(.GET, UrlEndpoints.branchUrl()).responseArray { (response: Response<[BranchObjectMapper], NSError>) in self.branchList = response.result.value! print(self.branchList.count) // count is correct for branch in self.branchList { print(branch.id) // prints nil print(branch.id) // prints nil } }

预先感谢

完整的JSON响应如下所示.在模型中只构造了需要的.

The complete JSON response looks like below. Have constructed only needed ones in Model.

[{"Id":"16"，"areaId":"17"，"name":"Al Aqiq"，"cityId":4，" Zip:"，" nameAr:" \ u0637 \ u0631 \ u064a \ u0642 \ u0627 \ u0644 \ u0645，" branchAddr:"测试，" branchAddr2:"测试纬度":"24.60425"，经度":"46.629631"，"cityId":"1}]

[{"Id":"16","areaId":"17","name":"Al Aqiq","cityId":4","Zip":"","nameAr":"\u0637\u0631\u064a\u0642 \u0627\u0644\u0645","branchAddr":"test","branchAddr2":"test"Latitude":"24.60425","Longitude":"46.629631","cityId":"1"}]

推荐答案

我认为您缺少ObjectMapper lib的正确文档. 选中此 Github ObjectMapper .

i think you are missing the right documentation of ObjectMapper lib. Check this Github ObjectMapper.

这些是lib支持的类型:

These are the types supported by the lib:

• Int
• Bool
• Double
• Float
• String
• RawRepresentable(枚举)
• Array<AnyObject>
• Dictionary<String, AnyObject>
• Object<T: Mappable>
• Array<T: Mappable>
• Array<Array<T: Mappable>>
• Set<T: Mappable>
• Dictionary<String, T: Mappable>
• Dictionary<String, Array<T:Mappable>>
• 以上所有选项
• 上述内容的未包装选项

• Int
• Bool
• Double
• Float
• String
• RawRepresentable (Enums)
• Array<AnyObject>
• Dictionary<String, AnyObject>
• Object<T: Mappable>
• Array<T: Mappable>
• Array<Array<T: Mappable>>
• Set<T: Mappable>
• Dictionary<String, T: Mappable>
• Dictionary<String, Array<T:Mappable>>
• Optionals of all the above
• Implicitly Unwrapped Optionals of the above

因此，如果您尝试映射不在该列表中的对象，则结果为nil.

So, if you are trying to map an Object not in that list, the result is nil.

您的情况是var location: CLLocation?.

如果需要映射CLLocation对象，一种方法是使用所有属性映射CustomCLLocation，如下所示: JSON(我不知道您的Json，这是一个示例)

If you need to map CLLocation Object, one way is to map a CustomCLLocation with all properties as follows: JSON(i don't know your Json, this is an example)

"location":{ "long": 43.666, "lat": 73.4 }

快速:创建另一个文件"CustomCLLocation"，例如第一个文件，但用于将CLLocation与您的Json映射

Swift: create another file "CustomCLLocation" for example like the first one but for mapping CLLocation with your Json

var latitude: Double? var longitude: Double? required init?(_ map: Map) { mapping(map) } func mapping(map: Map) { longitude <- map["long"] latitude <- map["lat"] }

现在，您可以映射伪造" CLLocation对象: var location:CustomCLLocation?

and now, you can map an "fake" CLLocation Object: var location: CustomCLLocation?

然后，如果您想要一个真正的CLLocation.只需创建一个像这样的Simply Extension(将其添加到CustomCLLocation文件中)即可:

Then if you want a really CLLocation. just create an Simply Extension like that(add it in the CustomCLLocation file):

extension CLLocation { public class func createFromCustomCLLocation(custom: CustomCLLocation) -> CLLocation { return self.init(custom.latitude,custom.longitude) } }

使用转换

var locationCLL = CLLocation.createFromCustomCLLocation(location) // now is a CLLocation

已Alamofire请求

我对iOS 8.0 +的最新版本的AlamofireObjectMapper的应用程序有相同的请求

Edited: Alamofire Request

I have the same request on my app with the last version of AlamofireObjectMapper for ios 8.0 +

Alamofire.request(.GET, UrlEndpoints.branchUrl()).responseArray { (response: [BranchObjectMapper]?, error : ErrorType?) in if(error != nil) { print(error) }else{ print("data downloaded") if let response = response { branchList(response) for branch in self.branchList { print(branch.id) print(branch.name) } } } }