79419826
Date: 2025-02-07 02:15:56
Score: 0.5
Natty:
Here is my solution, Elegant and Native-like Usage:
RadioButtonGroup(value: $selection) {
Text("radio A")
.radioTag("1")
Text("radio B")
.radioTag("2")
}
Snapshot:
Here is the code:
//
// RadioButtonGroup.swift
//
// Created by Frank Lin on 2025/1/21.
//
import SwiftUI
struct Radio: View {
@Binding var isSelected: Bool
var len: CGFloat = 30
private var onTapReceive: TapReceiveAction?
var outColor: Color {
isSelected == true ? Color.blue : Color.gray
}
var innerRadius: CGFloat {
isSelected == true ? 9 : 0
}
var body: some View {
Circle()
.stroke(outColor, lineWidth: 1.5)
.padding(4)
.overlay() {
if isSelected {
Circle()
.fill(Color.blue)
.padding(innerRadius)
.animation(.easeInOut(duration: 2), value: innerRadius)
} else {
EmptyView()
}
}
.frame(width: len, height: len)
.onTapGesture {
withAnimation {
isSelected.toggle()
onTapReceive?(isSelected)
}
}
}
}
extension Radio {
typealias TapReceiveAction = (Bool) -> Void
init(isSelected: Binding<Bool>, len: CGFloat = 30) {
_isSelected = isSelected
self.len = len
}
init(isSelected: Binding<Bool>, onTapReceive: @escaping TapReceiveAction) {
_isSelected = isSelected
self.onTapReceive = onTapReceive
}
}
struct RadioButtonGroup<V: Hashable, Content: View>: View {
private var value: RadioValue<V>
private var items: () -> Content
@ViewBuilder
var body: some View {
VStack {
items()
}.environmentObject(value)
}
}
fileprivate
extension RadioButtonGroup where V: Hashable, Content: View {
init(value: Binding<V?>, @ViewBuilder _ items: @escaping () -> Content) {
self.value = RadioValue(selection: value)
self.items = items
}
}
fileprivate
class RadioValue<T: Hashable>: ObservableObject {
@Binding var selection: T?
init(selection: Binding<T?>) {
_selection = selection
}
}
fileprivate
struct RadioItemModifier<V: Hashable>: ViewModifier {
@EnvironmentObject var value: RadioValue<V>
private var tag: V
init(tag: V) {
self.tag = tag
}
func body(content: Content) -> some View {
Button {
value.selection = tag
} label: {
HStack {
Text("\(tag):")
content
}
}
}
}
extension View {
func radioTag<V: Hashable>(_ v: V) -> some View {
self.modifier(RadioItemModifier(tag: v))
}
}
struct RadioButtonGroup_Preview: View {
@State var selection: String? = "1"
var body: some View {
RadioButtonGroup(value: $selection) {
Text("radio A")
.radioTag("1")
Text("radio B")
.radioTag("2")
}
}
}
#Preview {
RadioButtonGroup_Preview()
}
Reasons:
Posted by: wnow20 - Probably link only (1):
- Long answer (-1):
- Has code block (-0.5):
- Low reputation (1):
