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Day 23, View Builders

Forums > 100 Days of SwiftUI

Hi. I feel that I didn't understand fully how to use View Builders, when they can be useful?

3      

If I understood correctly, ViewBuilders allow us to use more than one view. in our container. Because usually, we can do something like:

SomeComponent {
    Text("Some text here.")
}

The above is equivalent to:

SomeComponent {
    return Text("Some text here.")
}

But if we want to allow something like:

SomeComponent {
    Text("Some text here.")
    Button("Click me!") { ... }
}

Then we need to use ViewBuilder, because we cannot have two returns in a closure. So what the ViewBuilder does is wrap the views in a tuple (a TupleView) and return this new view as the single element.

That is how the stacks (HStack, VStack, ZStack), ForEach, etc. work.

3      

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