我的 pickerview 无法从同一 View Controller 中获取的数组加载数据。但是,如果我将 fetchHistory
放入另一个 viewController(就在 historyViewController 之前)并通过导航发送数据,pickerView 会显示 confirms
数据。当我将 fetchHistory
放入 historyViewController 时,如何让它工作?或任何建议以某种方式放置 fetchHistory
而不是将其放入随机 viewController 的最佳方法?
历史 View Controller
var confirms = [DataWaitingConfirm]() //pickerView DataSource
override func viewDidLoad() {
super.viewDidLoad()
fetchHistory()//fetch data from server for 'confirms'
}
获取数据
func fetchHistory(){
let headers = ["Authorization" : "\(TokenType!) \(Token!)"]
Alamofire.request(.GET, "http://xxxx/history/", headers: headers, encoding: .JSON).responseJSON { response in
switch response.result {
case .Success:
if let value = response.result.value {
let json = JSON(value)
print(json)
for (results,subJson):(String, JSON) in json["results"] {
print(subJson["status"].int)
if subJson["status"].intValue == 3 {
print("ada 3")
let orderReference = subJson["px_reference"].stringValue
let date = subJson["invoice_date_str"].stringValue
let totalPaid = subJson["total_paid"].stringValue
let orderPicker = "\(orderReference) \(date) \(totalPaid)"
let confirm = DataWaitingConfirm(orderReference: orderReference, pickerConfirm: orderPicker)
self.confirms += [confirm]
}
}}
}
case .Failure(let error):
spinningActivity.hide(true)
print(error)
self.displayAlertMessage("could not fetch history")
}
}
}
pickerview 委托(delegate)
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
let orderToConfirm = confirms[row]
return orderToConfirm.pickerConfirm
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return confirms.count
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
}
最佳答案
您需要调用self.pickerView.reloadAllComponents()
来触发刷新。然后将再次调用数据源方法,您更新的数据将显示在选择器 View 中。
您的 Alamofire 请求异步返回,因此您应该在 self.confirms += confirm
之后触发重新加载。
注意:您还可以考虑使用 dispatch_async(dispatch_get_main_queue(), {...})
关于ios - pickerView 无法加载在同一 View Controller 中获取的数据(swift),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35315813/