Created
December 5, 2023 10:20
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SwiftUI bar chart bug
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import SwiftUI | |
import Charts | |
struct Value: Hashable { | |
let x: Int | |
let y: Int | |
} | |
struct ContentView: View { | |
let values: [Value] | |
let colors: [Color] = [.red, .green, .blue] | |
var body: some View { | |
VStack { | |
Chart { | |
ForEach(values, id: \.self) { value in | |
BarMark( | |
x: .value("X", value.x), | |
y: .value("Y", value.y), | |
width: .fixed(16) // a smaller (or none) fixed size works better | |
) | |
.foregroundStyle(colors[value.x % colors.count]) | |
} | |
} | |
.chartScrollableAxes(.horizontal) | |
Chart { | |
ForEach(values, id: \.self) { value in | |
BarMark( | |
x: .value("X", value.x), | |
y: .value("Y", value.y), | |
width: .fixed(25) // a larger fixed size triggers the bug quicker | |
) | |
.foregroundStyle(colors[value.x % colors.count]) | |
} | |
} | |
.chartScrollableAxes(.horizontal) | |
} | |
.padding() | |
} | |
} | |
#Preview { | |
var rnd = SystemRandomNumberGenerator() | |
// increase to bring out the bug quicker. Smaller values fit easier | |
let numberOfValues = 50 | |
var values: [Value] = [] | |
for index in 0 ..< numberOfValues { | |
values.append(Value(x: index, y: Int(rnd.next() % 50))) | |
} | |
return ContentView(values: values) | |
} |
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