How to load all data into picker view - json

Question

How to load all data into picker view, now I can load first data only
this is my data from JSON​ response
**jsonResponse ==> Optional([["PlanDate": 18/01/2019, "PlanDateFullFormat": 20190118], ["PlanDateFullFormat": 20190119, "PlanDate": 19/01/2019]])
jsonArray ==>[["PlanDate": 18/01/2019, "PlanDateFullFormat": 20190118], ["PlanDateFullFormat": 20190119, "PlanDate": 19/01/2019]]
jsonDictionary ==>["PlanDate": 18/01/2019, "PlanDateFullFormat": 20190118]
planDate ==> 18/01/2019. ==> I want load all plant date into picker view
Loop json ==> (key: "PlanDateFullFormat", value: 20190118)
Loop json ==> (key: "PlanDate", value: 18/01/2019)**
I cannot load all data into picker view
func getPlanDatetoPickerview(ptruckID: String)-> Void {
.....
//check data shipment for json Dictionary
let planDate: String = jsonDictionary["PlanDate"] as! String
print("planDate ==> \(planDate)")
//show on pickerView
for myplanDate in jsonDictionary{
print("Loop json ==> \(myplanDate)")
}//for
self.getpPlandate = [jsonDictionary["PlanDate"] as! String]
.....
}catch let myerror{
print(myerror)
// check display plandate in database
....
}//DispatchQueue
}//catch
}//task
task.resume()
}//getPlanDatetoPickerview

Answer 1

I'm assuming your pickerView is set up properly but you are only seeing one row? If that's the case that's probably because of this line of code:
//change array to dictionary
guard let jsonDictionary:Dictionary = jsonArray.first else{
return
}//guard
print("jsonDictionary ==>\(jsonDictionary)")
You are only getting the first element of your array.
What I would do instead is just use jsonResponse directly like this:
var planDates = [Any]()
if let jsonResponse = jsonResponse {
for dictionary in jsonResponse {
planDates.append(dictionary["PlanDate"])
}
}
Then you can use planDates to populate your pickerView.
Or maybe, you are trying to load a pickerView with data from a dictionary?
First, your ViewController has to subclass UIPickerViewDataSource, UIPickerViewDelegate.
Then in ViewDidLoad, set your ViewController as the delegate/datasource for your UIPickerView:
repeatPicker.delegate = self
repeatPicker.dataSource = self
Then implement your Delegate/Datasource methods:
// The number of components of your UIPickerView
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
// The number of rows of data
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
// Return number of planDate entries
}
// The data to return for the row and component (column) that's being passed in
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
}

Answer 2

Actually its pretty easy to load data to a picker view. It's like UITableView.
class YourViewController {
var yourArray: [YourObject] = []
var yourPicker = UIPicker()
override func viewDidLoad() {
super.viewDidLoad()
yourPicker.dataSource = self
yourPicker.delegate = self
}
}
// MARK: - UIPickerViewDataSource
extension YourViewController: UIPickerViewDataSource {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return yourArray.count
}
}
// MARK: - UIPickerViewDelegate
extension YourViewController: UIPickerViewDelegate {
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return yourArray[row].title
}
}