具有最大值的 SwiftUI 自定义滑块

Question

我使用这个很棒的代码来获得一个滑块。 here

但是如何将最大值设置为 30 而不是 100？

这个例子是从 0 到 100。

希望大家帮忙。

struct CustomView: View {

@Binding var percentage: Float // or some value binded

var body: some View {
    GeometryReader { geometry in
        ZStack(alignment: .leading) {
            Rectangle()
                .foregroundColor(.gray)
            Rectangle()
                .foregroundColor(.accentColor)
                .frame(width: geometry.size.width * CGFloat(self.percentage / 100))
        }
        .cornerRadius(12)
        .gesture(DragGesture(minimumDistance: 0)
            .onChanged({ value in
                self.percentage = min(max(0, Float(value.location.x / geometry.size.width * 100)), 100)
            }))
    }
}

}

Answer 1

您只需将 100 替换为 30 即可从 0 绑定到 30

struct CustomView: View {

    @Binding var percentage: Float // or some value binded

    var body: some View {
        GeometryReader { geometry in
            ZStack(alignment: .leading) {
                Rectangle()
                    .foregroundColor(.gray)
                Rectangle()
                    .foregroundColor(.accentColor)
                    .frame(width: geometry.size.width * CGFloat(self.percentage / 30))
            }
            .cornerRadius(12)
            .gesture(DragGesture(minimumDistance: 0)
            .onChanged({ value in
                self.percentage = min(max(0, Float(value.location.x / geometry.size.width * 30)), 30)
                print(self.percentage)
            }))
        }
    }
}