This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
The NavigationView view is a very important view, and one you’ll use all the time.
NavigationView {
}Once you wrap a view into a NavigationView you can add a title to the view with the navigationTitle() modifier:
NavigationView {
Text("Hello")
.navigationTitle("Welcome")
}
The main benefit, however, is that now we can make views be links that bring the user to other views.
First thing we do is creating another view. You an add it to the same file, or to another file in your project:
struct ThanksView: View {
var body: some View {
Text("Thanks for checking out the app!")
}
}
````
Then, wrap the "Hello" `Text` view into a `NavigationLink` view, where we set the destination parameter to `ThanksView`:swift NavigationView { NavigationLink(destination: ThanksView()) { Text(“Hello”) .navigationTitle(“Welcome”) } }
Now a lot of things are happening automatic: the `Hello` text turns blue and tappable:
And once we tap on it, we're shown the `ThanksView` and a link to get back to the original view. The text shown in the top left button comes from the `navigationTitle` modifier we set:
Here's the full code used in the example:swift import SwiftUI
struct ThanksView: View { var body: some View { Text(“Thanks for checking out the app!”) } }
struct ContentView: View { var body: some View { NavigationView { NavigationLink(destination: ThanksView()) { Text(“Hello”) .navigationTitle(“Welcome”) } } } }
That's one way to navigate between views, and I'd say the simplest one.
Sometimes before navigating to another view you want to perform some action. In this case, we can have a boolean property `showThanks` that we can set to `true` when we want the `ThanksView` to appear. We do so when the user taps a button:swift struct ContentView: View { @State private var showThanks = false
var body: some View {
NavigationView {
VStack {
NavigationLink(destination: ThanksView(), isActive: $showThanks) {}
Button("Hello") {
showThanks = true
}
.navigationTitle("Welcome")
}
}
}}
The app looks exactly the same as before, but now when the user taps the button, we can do something, like logging the transition or anything else:swift Button(“Hello”) { showThanks = true print(“Transitioned to ThanksView”) } ```
Remember that
print()does not log in preview mode, only in the Simulator
This content originally appeared on flaviocopes.com and was authored by flaviocopes.com
flaviocopes.com | Sciencx (2021-10-03T05:00:00+00:00) SwiftUI: the NavigationView view. Retrieved from https://www.scien.cx/2021/10/03/swiftui-the-navigationview-view/
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