CODEWITHSUNDEEP
viewswiftuiscrollviewframe
Vee
Vee

Reputation: 1841

SwiftUI Scrollview contents are outside scrollable area

I'm having trouble keeping the contents of a ScrollView contained within the scrollview: enter image description here

Initially, I want to display letters A and B in the ScrollView and have the user scroll to see additional letters. However, even though I've constrained the parent VStack to a frame with height of 120, you can also see the letter C which is outside of the ScrollView (as indicated by the blue background). Here's the code:

var body: some View {            
    VStack(alignment: .leading, spacing: 0) {
         HStack(alignment: .center , spacing: 5) {
             Text("Letter").font(.tableHeader).frame(width: 75, height: 30, alignment: .center)
         } // HStack
         .frame(width: 195, height: 50, alignment: .center)
         .background(Color.green)

         VStack(alignment: .leading, spacing: 0) {
             GeometryReader { outsideProxy in
                 ScrollView (.vertical, showsIndicators: false) {
                     ZStack(alignment: .top) {           
                         GeometryReader { insideProxy in
                             Color.clear
                             // get offset
                         } // GeometryReader inside
                         VStack(alignment: .leading, spacing: 10) {
                             HStack(alignment: .center, spacing: 5){
                                 Text("A").font(.tableData).frame(width: 75, height: 50, alignment: .center)
                             }
                             HStack(alignment: .center, spacing: 5){
                                 Text("B").font(.tableData).frame(width: 75, height: 50, alignment: .center)
                             }
                             HStack(alignment: .center, spacing: 5){
                                 Text("C").font(.tableData).frame(width: 75, height: 50, alignment: .center)
                             }
                             HStack(alignment: .center, spacing: 5){
                                 Text("D").font(.tableData).frame(width: 75, height: 50, alignment: .center)
                             }
                         } // VStack
                     } // ZStack
                 } // Scrollview
             } // GeometryReader outside
             .background(Color.blue)
         } // VStack
         .frame(width: 195, height: 120, alignment: .leading)
     } // VStack
 }

The full code requires that use of GeometryReader (and consequently, the ZStack) which is why I've left those items in the sample above.

What is the best way to solve this issue? Open to any improvements for coding the above layout. Keep in mind that ultimately, I want to the user to be able to click on A, B, C, or D to be taken to the next view in the navigation stack.

Upvotes: 3

Views: 2305

Answers (1)

Asperi
Asperi

Reputation: 257503

Make it clipped

 ScrollView (.vertical, showsIndicators: false) {
     ZStack(alignment: .top) {           
         GeometryReader { insideProxy in
             Color.clear
             // get offset
         } // GeometryReader inside
         VStack(alignment: .leading, spacing: 10) {
             HStack(alignment: .center, spacing: 5){
                 Text("A").font(.tableData).frame(width: 75, height: 50, alignment: .center)
             }
             HStack(alignment: .center, spacing: 5){
                 Text("B").font(.tableData).frame(width: 75, height: 50, alignment: .center)
             }
             HStack(alignment: .center, spacing: 5){
                 Text("C").font(.tableData).frame(width: 75, height: 50, alignment: .center)
             }
             HStack(alignment: .center, spacing: 5){
                 Text("D").font(.tableData).frame(width: 75, height: 50, alignment: .center)
             }
         } // VStack
     } // ZStack
 } // Scrollview
 .clipped()           // << here !!

Upvotes: 4

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