For SwiftUI Gestures: Function declares an opaque return type, but the return statements in its body-CodePudding

I've received that error message for views, and I typically did @Viewbuilder or wrapped in AnyView. However, that won't work here because we have a gesture; how can I solve the problem for gestures? I tried AnyGesture to no avail.

 @State private var steadyStateEmojiZoomScale: CGFloat = 1
    @GestureState private var emojiZoomScale: CGFloat = 1
    
    private func pinchGesture() -> some Gesture {
        if selectedEmojis.count == 0 {
            return zoomGesture()
        } else {
            return MagnificationGesture()
                .updating($emojiZoomScale) { latestGestureScale, emojiZoomScale, _ in
                    emojiZoomScale = latestGestureScale
                }
                .onEnded { gestureScaleAtEnd in
                    steadyStateEmojiZoomScale *= gestureScaleAtEnd
                }
        }
    }

CodePudding user response：

Assuming that not provided zoomGesture has same value as magnification gesture (otherwise it would not be operable in any case) the fixed variant can be as follows

private func pinchGesture() -> AnyGesture<CGFloat> {
    if selectedEmojis.count == 0 {
        return AnyGesture(zoomGesture())
    } else {
        return AnyGesture(MagnificationGesture()
            .updating($emojiZoomScale) { latestGestureScale, emojiZoomScale, _ in
                emojiZoomScale = latestGestureScale
            }
            .onEnded { gestureScaleAtEnd in
                steadyStateEmojiZoomScale *= gestureScaleAtEnd
            })
    }
}

alternate is to break this on two separated gesture properties and use condition within view hierarchy to have advantage of ViewBuilder