CODEWITHSUNDEEP
swiftmacosswiftuimacos-catalina
steveblue
steveblue

Reputation: 490

TapGesture is not working in Xcode 11.0 Beta

Playing around with SwiftUI and this TapGesture() (or any other gesture) doesn't seem to work for me in a Cocoa app for MacOS, despite @available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *) when I View Definition on TapGesture. 

import SwiftUI

struct CircleView : View {
    var body: some View {
        Circle()
            .fill(Color.blue)
            .frame(width: 400, height: 400, alignment: .center)
            .gesture(
                TapGesture()
                    .onEnded { _ in
                        print("View tapped!")
                }
            )
    }
}

#if DEBUG
struct CircleView_Previews : PreviewProvider {
    static var previews: some View {
        CircleView()
    }
}
#endif

The Build succeeded, I'm viewing the Circle in Preview and I have the console open, but nothing seems to print.

Am I doing something wrong? Is this a 10.15 Beta bug? Is there another framework I need to import other than SwiftUI? New to Swift here.

Upvotes: 2

Views: 1766

Answers (1)

Rob
Rob

Reputation: 438232

The tap is working fine, but when you’re previewing the app, you won’t see your print statements in the console. Actually run the app and you’ll see the print statements show up in your console.

Or change your app to present something in the UI confirming the tap gesture, e.g., an Alert:

struct CircleView : View {
    @State var showAlert = false

    var body: some View {
        Circle()
            .fill(Color.blue)
            .tapAction {
                self.showAlert = true
            }
            .presentation($showAlert) {
                Alert(title: Text("View Tapped!"),
                      primaryButton: .default(Text("OK")),
                      secondaryButton: .cancel())
        }
    }
}

Or perhaps you would want to animate the change of color of the shape:

struct CircleView: View {
    @State var isBlue = true

    var body: some View {
        Circle()
            .fill(isBlue ? Color.blue : Color.red)
            .tapAction {
                withAnimation {
                    self.isBlue.toggle()
                }
        }
    }
}

Upvotes: 1

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