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Views as properties

Paul Hudson    @twostraws   

There are lots of ways to make it easier to use complex view hierarchies in SwiftUI, and one option is to use properties – to create a view as a property of your own view, then use that property inside your layouts.

For example, we could create two text views like this as properties, then use them inside a VStack:

struct ContentView: View {
    let motto1 = Text("Draco dormiens")
    let motto2 = Text("nunquam titillandus")

    var body: some View {
        VStack {
            motto1
            motto2
        }
    }
}

You can even apply modifiers directly to those properties as they are being used, like this:

VStack {
    motto1
        .foregroundColor(.red)
    motto2
        .foregroundColor(.blue)
}

Creating views as properties can be helpful to keep your body code clearer – not only does it help avoid repetition, but it can also get more complex code out of the body property.

Swift doesn’t let us create one stored property that refers to other stored properties, because it would cause problems when the object is created. This means trying to create a TextField bound to a local property will cause problems.

However, you can create computed properties if you want, like this:

var motto1: some View { Text("Draco dormiens") }
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