Question

这些是我简单的类结构。我根据用户ID和状态拉取状态可能有也可能没有城市，城市可能有也可能没有拉链。这些是基于用户的设置方式。我成功地从我的网站检索数据，但是我在向城市和城市注入拉链时遇到了问题。我只能在表格视图中显示状态。尝试使用在屏幕上打印时，City和Zip对象为空。知道为什么我不能将城市和拉链注入州对象吗？

class State {
    var id:Int
    var name:String
    var city:[City]?

    init(id:Int, name:String, city:[City]?){
        self.id = id
        self.name = name
        self.city = city
    }
}

class City {
    var id:Int
    var name:String
    var zip:[Zip]?

    init(id:Int, name:String, zip:[Zip]?){
        self.id = id
        self.name = name
        self.zip = zip
    }
}  

class Zip {
    var id:Int
    var name:String

    init(id:Int, name:String){
        self.id = id
        self.name = name
    }
}

我用它们用getStateCityZip()方法生成表格视图。我从我的网站上提取数据。

// These are table view controller class properties
var state = [State]()
var city = [City]()
var zip = [Zip]()

override func viewDidLoad() {
     super.viewDidLoad()
     getStateCityZip()
}

func getStateCityZip(){

    // Get States
    getStatesByUserID(userID) {
        (result)->() in
        var states = JSON(result)
        for index in 0... states.count - 1 {
            let statesID: Int = states[index]["stateID"].intValue
            let statesName: String = states[index]["title"].stringValue


            // Get Cities by State ID
            self.getCities(stateID) {
                (result) -> () in
                let cities = JSON(result)
                for index in 0...cities.count - 1 {
                    let cityID: Int = cities[index]["cityID"].intValue
                    let cityName: String = cities[index]["title"].stringValue


                    // Get zip by city id
                    self.getZips(cityID){
                        (result) -> () in
                        var zips = JSON(result)

                        for zipIndex in 0... zips.count - 1 {
                            let zipID: Int = zips[zipIndex]["id"].intValue
                            let zipName: String = zips[zipIndex]["zipName"].stringValue

                            // Append single zip into zips array
                            self.zip.append(Zip(id: zipID, name: zipName))
                        }
                    }

                    //Append a single city into cities array
                    self.city.append(City(id: cityID, name: cityName, zip: self.zip))
                }
            }

            // Append a single state that contains cities and zips into states array
            self.state.append(State(id: stateID, name: stateName, city:self.city ))
        }
    }
    self.tableView.reloadData()
}

这是我的表格视图cellForRowAtIndexPath方法。我只能看到州名

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("StateCell", forIndexPath: indexPath) as! StateCityZipTableViewCell
    let state = self.state[indexPath.row]

    println(state.city?.count) // This prints 0

    cell.label.text = "\(state.name)" // This displays state name in my tableview cell
    return cell
}

将对象注入另一个对象

0 个答案: