SwiftUI - how to respond to TextField onCommit in an other View? - swiftui

Question

I made a SearchBarView view to use in various other views (for clarity, I removed all the layout modifiers, such as color and padding):
struct SearchBarView: View {
#Binding var text: String
#State private var isEditing = false
var body: some View {
HStack {
TextField("Search…", text: $text, onCommit: didPressReturn)
.overlay(
HStack {
Image(systemName: "magnifyingglass")
.frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
if isEditing {
Button(action: {
self.text = ""
}) {
Image(systemName: "multiply.circle.fill")
}
}
}
)
}
func didPressReturn() {
print("did press return")
}
}
It looks and works great to filter data in a List.
But now I'd like to use the SearchBarView to search an external database.
struct SearchDatabaseView: View {
#Binding var isPresented: Bool
#State var searchText: String = ""
var body: some View {
NavigationView {
VStack {
SearchBarView(text: $searchText)
// need something here to respond to onCommit and initiate a network call.
}
.navigationBarTitle("Search...")
.navigationBarItems(trailing:
Button(action: { self.isPresented = false }) {
Text("Done")
})
}
}
}
For this, I only want to start the network access when the user hits return. So I added the onCommit part to SearchBarView, and the didPressReturn() function is indeed only called when tapping return. So far, so good.
What I don't understand is how SearchDatabaseView that contains the SearchBarView can respond to onCommit and initiate the database searh - how do I do that?

Answer 1

Here is possible approach
struct SearchBarView: View {
#Binding var text: String
var onCommit: () -> () = {} // inject callback
#State private var isEditing = false
var body: some View {
HStack {
TextField("Search…", text: $text, onCommit: didPressReturn)
.overlay(
HStack {
Image(systemName: "magnifyingglass")
.frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
if isEditing {
Button(action: {
self.text = ""
}) {
Image(systemName: "multiply.circle.fill")
}
}
}
)
}
func didPressReturn() {
print("did press return")
// do internal things...
self.onCommit() // << external callback
}
}
so now in SearchDatabaseView you can
VStack {
SearchBarView(text: $searchText) {
// do needed things here ...
}
}