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HomeiOS developmentPresenting {a partially} seen backside sheet in SwiftUI on iOS 16

Presenting {a partially} seen backside sheet in SwiftUI on iOS 16

Revealed on: June 6, 2022

This publish is updated for Xcode 14.0 Beta 1 and iOS 16 Beta 1. It supersedes a model of this publish that you’ll find right here

On iOS 15, Apple granted builders the power to current partially seen backside sheets utilizing a part referred to as UISheetPresentationController. Initially, we needed to resort to utilizing a UIHostingController to convey this part to SwiftUI.

With iOS 16, we do not have to do that anymore. You can also make use of the presentationDetents view modifier to configure your sheets to be absolutely seen, roughly half seen, or some customized fraction of the display screen’s peak.

To do that, you may apply the presentationDetents modifier by making use of it to your sheet’s content material:

struct DetentsView: View {
    @State var isShowingSheet = false

    var physique: some View {
        Button("Present the sheet!") {
            isShowingSheet = true
        .sheet(isPresented: $isShowingSheet) {
            ZStack {
                Shade(purple: 0.95, inexperienced: 0.9, blue: 1)
                Textual content("That is my sheet. It may very well be a complete view, or only a textual content.")
            .presentationDetents([.medium, .fraction(0.7)])

Here is what the sheet seems to be like when it is offered on an iPhone:

On this instance, my sheet will initially take up about half the display screen and will be expanded to 70% of the display screen peak. If I need to permit the consumer to broaden my sheet to the complete peak of the display screen I might add the .massive choice to the checklist of presentationDetents.

By default, sheets will solely help the .massive detent so that you need not use the presentationDetents view modifier once you need your sheet to solely help the view’s full peak.



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