bysykkel | tiny JavaScript app to get | Runtime Evironment library
kandi X-RAY | bysykkel Summary
kandi X-RAY | bysykkel Summary
A tiny JavaScript app to get real-time map of Oslo bike sharing status
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QUESTION
I have TabView
containing 2 entries....both trigger display of StationListView
. The issue I have is that when I click on 2nd tab, the onAppear
is being called twice (once each for the 2 instances) having the effect of data for 2nd tab showing, following shortly by data again for 1st tab.
ANSWER
Answered 2020-Sep-20 at 17:25You'd like the view to reload the data from the network when it is selected. Unfortunately, .onAppear
doesn't work because the View isn't loaded when you select it.
Instead, reload the data when selection
changes.
To make this work in SwiftUI 2.0 (Xcode 12), pass the tag
number and selection
(as a Binding
) to the StationListView
, then have StationListView
reload the data when the tag
matches the selection
both .onAppear
and when selection
changes using onChange(of: selection)
:
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