UPGRADE YOUR SKILLS: Learn advanced Swift and SwiftUI on Hacking with Swift+! >>

Use new .onChange modifier with Picker

Forums > SwiftUI

@frios  

I have a Picker setup as a segmented control which modifies a property in an environment object. When that property is modified, I would like to use the new .onChange modifier to set a local binding's value.

    @EnvironmentObject var tvm: TrucksViewModel
    @Binding var slideoverPosition: CGFloat

...

         //status picker
         Picker(selection: $tvm.status, label: Text("Status")) {
               Text("All").tag("All")
                Text("Scheduled").tag("Scheduled")
                Text("Live").tag("Live")
           }
           .onChange (of: tvm.status) {
                  pickerChanged()
            }
            .pickerStyle(SegmentedPickerStyle())

When I include the .onChange modifier I can't seem to figure out what the proper value of the of: parameter should be. I have tried tvm.status and $tvm.status but I keep getting an error like:

Cannot convert value of type 'String' to expected argument type '()'

Not sure how to fix this. Any help would be appreciated.

3      

@frios  

Solution found!

                        .onChange(of: tvm.status, perform: { (value) in
                            pickerChanged()
                        })

6      

TAKE YOUR SKILLS TO THE NEXT LEVEL If you like Hacking with Swift, you'll love Hacking with Swift+ – it's my premium service where you can learn advanced Swift and SwiftUI, functional programming, algorithms, and more. Plus it comes with stacks of benefits, including monthly live streams, downloadable projects, a 20% discount on all books, and free gifts!

Find out more

Sponsor Hacking with Swift and reach the world's largest Swift community!

Archived topic

This topic has been closed due to inactivity, so you can't reply. Please create a new topic if you need to.

All interactions here are governed by our code of conduct.

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.