Question

我搜索过（并发现了一些使用静态数组），但是找不到与我尝试使用JSON填充结构相关的任何内容。

我是Swift和StackExchange的新手，所以如果我错过了，请告诉我！

我有三个结构从JSON代码填充。注意：departmentName与其他两个结构中的Department相同

struct Dept: Decodable {
let departmentName: String 
}

struct Company: Decodable {
let companyName: String
let Department: String
}

struct Spread: Decodable {
let spreadName: String
let spreadType: String
let Department: String
}

这些加载在viewDidLoad上。数组（ish）形式的数据示例如下：

Department = "Department 1"
Company = ["Company 1":"Department 1","Company 2":"Department 2"]
Spread = ["Spread 1":"Department 1","Spread 2 ":"Department 2"]

我目前的PickerView功能代码：

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

public func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
    var countRows : Int = dep.count
    if pickerView == companyPicker {
        countRows = self.company.count
    }
    else if pickerView == spreadPicker {
        countRows = self.spread.count
    }
    else if pickerView == incidentPicker {
        countRows = self.incident.count
    }
    return countRows
}

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
    if pickerView == deptPicker {
        let titleRow = dep[row].departmentName
        return titleRow
    }
    else if pickerView == companyPicker {
        let titleRow = company[row].companyName
        return titleRow
    }
    else if pickerView == spreadPicker {
        let titleRow = spread[row].spreadName
        return titleRow
    }
    else if pickerView == incidentPicker {
        let titleRow = incident[row].incidentTypeName
        return titleRow
    }
    return ""
}

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    if pickerView == deptPicker {
        self.deptartmentTextField.text = self.dep[row].departmentName
        self.deptartmentTextField.resignFirstResponder()
    }
    else if pickerView == companyPicker {
        self.companyTextField.text = self.company[row].companyName
        self.companyTextField.resignFirstResponder()
    }
    else if pickerView == spreadPicker {
        self.spreadTextField.text = self.spread[row].spreadName
        self.spreadTextField.resignFirstResponder()
    }
    else if pickerView == incidentPicker {
        self.incidentTextField.text = self.incident[row].incidentTypeName
        self.incidentTextField.resignFirstResponder()
    }
}

我想我最大的问题是，是否有办法根据部门选择器过滤公司和点差选择器。

Answer 1

为了解决这个问题，我添加了两个过滤第一个部门选择器中数据的函数。我将这些添加到我的didSelectRow选择器函数中。然后我在过滤后重新加载了第二个和第三个选择器。

根据第一次使用结构的选择过滤第二和第三次选择视图

1 个答案: