Is there any way using like 'didselect'??

[dev-yong]

#I have two related picker view
first picker : [ [Alphabet, Numbers] ]
second picker : [ [a,b,c, ...] or [1,2,3, ...] ]
if I select 'Alphabet' at first picker, second picker show [a,b,c, ...]
and if select 'Numbers', show [1,2,3, ...]

[kmcgill88]

Hi @LeeGwangYong,

Were you trying to do this with 1 instance of McPicker? My first instinct says show McPicker with [ [Alphabet, Numbers] ], when the user makes a selection and McPicker closes, use the selection to show another instance of McPicker with [ [a,b,c, ...] or [1,2,3, ...] ] then once the user makes a selection you will have your final selections.

Adding a delegate to just listen for didSelect isn't bad ideal though! We could add a delegate callback here. I can see that use case being very helpful for those who want to know which value is selected before McPicker is closed with a selection.

[dev-yong]

Yes! I want to use just 1 instance of McPicker. Thank you for your quick response.
And I will try to follow your advice.
Thank you 👍

[kmcgill88]

You could also try to subclass McPicker and override the delegate methods. Not sure that'll work but worth a shot. I'd like to keep McPicker simple and easy to use so I sorta shy away from adding things on the limb.

[dev-yong]

I added some code at didselect method

public func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        self.pickerSelection[component] = pickerData[component][row]
        (... update pickerData[1]...)
		picker.reloadComponent(1)
        picker.selectRow(0, inComponent: 1, animated: true)
        pickerSelection[1] = pickerData[1][0]
    }

it's really cool library

[kmcgill88]

Thanks @LeeGwangYong! This is a similar request @AlaeddineOuerteni pointed out wanting some control over the delegate too. I'm open to the idea, just curious how to best implement it. My first thought is to have McPicker have its own delegate method(s). Like McPickerViewDelegate, which would enforce proper use of data: [[String]] and pickerSelection: [Int:String] without actually exposing either publicly. I'm afraid it's opened it could be easily misused.

[kmcgill88]

Hello @LeeGwangYong, I have not cut a release yet but you might be interested in #32. It adds a SelectionChangedHandler. See the updated REAME in master branch for an example. I will cut a 1.0.0 release very soon! 💯