Determine UIScreen half in SwiftUI - swift

Question

I have a gesture applied to my text. Right now, it is sitting at the bottom of the screen and if I drag it to anywhere and let go, it goes back to the bottom. But if I drag it to the top half of my device screen, it should stay at the top.
The feature is almost ready to go, it just needs the correct function to split using UIScreen.main.bounds.
struct SwiftUIView: View {
#State var offset: CGSize = .zero
#State var isOnTop = false
var body: some View {
Text("Hello!")
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: isOnTop == true ? .top : .bottom)
.offset(offset)
.gesture(
DragGesture()
.onChanged { value in
withAnimation(.spring()) {
offset = value.translation
}
}
.onEnded { value in
withAnimation(.spring()) {
offset = .zero
// if dragged to the top half of the screen, set true
//isOnTop = true
}
}
)
}
}

Answer 1

This is how I will do, I use GeometryReader to have the size of my screen and I will apply logic to my offset when my gesture is ended
struct SwiftUIView: View {
#State private var yOffset: CGFloat = 0.0
#State private var xOffset: CGFloat = 0.0
#State private var height: CGFloat = 0
#State private var lastXOffset: CGFloat = 0.0
#State private var lastYOffset : CGFloat = 0.0
var body: some View {
GeometryReader{ geo in
VStack{
Spacer()
Text("Hello!")
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .bottom)
.offset(x: xOffset, y: yOffset >= 0 ? 0: yOffset)
.gesture(DragGesture().onChanged({ gesture in
self.xOffset = gesture.translation.width + lastXOffset
self.yOffset = gesture.translation.height + lastYOffset
}).onEnded({ _ in
withAnimation{
lastXOffset = xOffset
if yOffset <= -height/2 {
yOffset = -height + geo.safeAreaInsets.top
///save last offset
lastYOffset = yOffset
} else {
yOffset = 0
///save last offset
lastYOffset = yOffset
}
}
}))
}
.onAppear{
height = geo.size.height
}
}
}
}