Swift：Json解析两个pickerView在国家和城市之间

我有两个JSON网址。想要在两个UIPickerView之间解析。一个用于国家的UIPickerView，另一个用于城市。我已经能够在国家的第一个UIPickerView中解析JSON，在这里数据即将完美。但是当点击城市的UIPickerView时，我在DidSelectRow func中收到了一条线程消息。请尝试解决此问题Swift：Json解析两个pickerView在国家和城市之间

这里是我的代码。

var arrCountryPicker = [CountryPicker]() 

var arrCitiPicker = [CityPicker]() 

    var id = 0 
    var country_id = 0

我的两个网址

let url = URL(string: "http://......./mobile-app/countries")

let url = URL(string: "http://......../mobile-app/city-by-country-id?country_id="+String(country_id))

PickerViewCode

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

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 


    var country: Int = arrCountryPicker.count 

    if pickerView == cityPickerView { 

     country = self.arrCitiPicker.count 
    } 
    return country 
} 

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 

    if pickerView == countryPickerView { 

     let titleRow = arrCountryPicker[row].name 

     return titleRow 

    } else if pickerView == cityPickerView{ 
     let titleRow = arrCitiPicker[row].name 

     return titleRow 
    } 
    return "" 
} 

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 

    countryTextField.text = arrCountryPicker[row].name 

    if pickerView == countryPickerView { 
     self.countryTextField.text = self.arrCountryPicker[row].name 
     self.country_id = self.arrCountryPicker[row].id! 
     self.countryPickerView.isHidden = true 
    } 
    else if pickerView == cityPickerView{

Thread about down code is "Thread 1: exc_bad_instruction(code=exc_1386_invop,subcode=0x0)

 self.cityTextField.text = self.arrCitiPicker[row].name 

     self.cityPickerView.isHidden = true 

    } 
    self.view.endEditing(true) 
} 


func textFieldDidBeginEditing(_ textField: UITextField) { 

    if (textField == countryTextField){ 
     self.countryPickerView.isHidden = false 

    } 
    else if (textField == cityTextField){ 
     self.cityPickerView.isHidden = false 

    } 

}

来源

2017-10-09 Minzu

确保您的网点都连接。可能是你的'cityTextField'插座没有连接。 – rmaddy

如果让也试试。可能价值是零。尝试https://stackoverflow.com/questions/36871398/thread-1-exc-bad-instruction-code-exc-1386-invop-subcode-0x0 –

其中你遇到了这个问题bro –

无论何时更改国家/地区，您都需要更新城市选取器阵列。

在做了选择国家选择器，呼叫web服务特定国家id和更新城市阵列。

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 

    //Remove this line 
    //txtCountry.text = self.arrCountries[row].name 

    if pickerView == CountryPicker { 
     self.txtCountry.text = self.arrCountries[row].name 
     self.country_id = self.arrCountryPicker[row].id! 

     //Update city array according selected country 
     self.updateCitiesFor(id: row) 

     self.CountryPicker.isHidden = true 
    } else if pickerView == cityPicker { 
     self.txtCity.text = self.arrCities[row].name 
     self.cityPicker.isHidden = true 
    } 
    self.view.endEditing(true) 
}

FUNC键更新arrCitiPicker

func updateCitiesFor(id: Int) { 

    let url = URL(string: "http://......../mobile-app/\(id)") 

    //Call web service and store cities data of selected country into arrCitiPicker 

    //Clear city textfield when country change 
    self.txtCity.text = ""  

    //Update City Picker with new data 
    cityPicker.reloadAllComponents() 
}

来源

2017-10-09 05:32:33

谢谢你的回答。我必须写更新arrCityPicker – Minzu

调用城市的Web服务并将响应数据添加到数组中。但首先打印你的城市阵列。你的错误可能没有价值。 –

现在我有这个“致命错误：索引超出范围” – Minzu

Swift：Json解析两个pickerView在国家和城市之间

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