NG4 TNS3 DropDown clears after return navigation (iOS only)

[philpalmieri]

The DropDownModule seems to lose binding to the UIPickerViewDataSource (or the owner reference in DropDownListDataSource) on 'back' navigation in iOS only - works in android... I'm only able to test in ios 10.3, this was not happening in 1.5 on ios 9 before the NG4 build

Reproduce

• Build a dropdown with a list of items
• Navigate to a new page
• use the built in back button on ios
• the spinner is now cleared, and closing/re-opening continues to be cleared

clean demo repository

• https://github.com/philpalmieri/nativescript-dropdown-navigation-bug
• (ValueList) Version https://github.com/philpalmieri/nativescript-dropdown-navigation-bug/tree/valuelist-version

[PeterStaev]

Hey @philpalmieri , this should be fixed with the 3.0.1 version available now on npm.

[philpalmieri]

Awesome, thank you so much