How to create segmented control in SwiftUI
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How to create segmented control in SwiftUI
Table of Contents
A segmented control is a horizontal control that consists of multiple segments, each segment functioning as a mutually exclusive button.
Segmented Control.In UIKit, we have UISegmentedControl, but in SwiftUI, we don't have a dedicated view for this kind of control. Apple treats segmented control as one variation of a Picker, which makes sense because they both share the same functionality. The following is the definition of a Picker.
A Picker is a SwiftUI equivalent of UIKit's UIPickerView. It is a control that allows you to select a value from a list of mutually exclusive values.
As you can see, both picker and segmented control is a control that lets users choose the value out of mutually exclusive options.
Creation
Since segmented control is just another variation of a picker, SwiftUI treats it as such. To create a segmented control, we create a picker view and apply a SegmentedPickerStyle() to it via the pickerStyle modifier.
struct ContentView: View {
@State private var selectedColorIndex = 0
var body: some View {
VStack {
Picker("Favorite Color", selection: $selectedColorIndex, content: {
Text("Red").tag(0)
Text("Green").tag(1)
Text("Blue").tag(2)
})
.pickerStyle(SegmentedPickerStyle()) // <1>
Text("Selected color: \(selectedColorIndex)")
}
}
}<1> Apply segmented picker style with .pickerStyle modifier.
Segmented Control.I won't go in detail of creation here since it is the same a picker which you can read here. I encourage you to visit that post for detail on creating a picker/segmented control.
Conclusion
Even though segmented control and picker share the same functionality, they serve a different purpose. Segmented controls are often used to display different views. In Maps, for example, a segmented control lets you switch between Map, Transit, and Satellite views. On the other hand, a picker view aims to offer an easy way for people to enter information by choosing from a medium-to-long list of items. I suggest you consult Human Interface Guidelines for detailed information.
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