SwiftletRadioButtonPicker for Swift and SwiftUI

Creates a cross-platform Radio Button Picker that allow the user to select from a small group of options by presenting a list of SwiftletRadioButton objects that the user can tap on to select one items from the list.

Installation

Swift Package Manager (Xcode 11 and above)

1. Select File > Swift Packages > Add Package Dependency… from the File menu.
2. Paste https://github.com/Appracatappra/SwiftletRadioButtonPicker.git in the dialog box.
3. Follow the Xcode’s instruction to complete the installation.

Why not CocoaPods, or Carthage, or blank?

Supporting multiple dependency managers makes maintaining a library exponentially more complicated and time consuming.

Since, the Swift Package Manager is integrated with Xcode 11 (and greater), it’s the easiest choice to support going further.

Using SwiftletRadioButtonPicker

The SwiftletRadioButtonPicker works best when presenting a very limited number of options to the user. For example: selecting Male or Female.

Generally this Picker should only be used for six or less options on platforms like iOS. When the user need to select from a greater number of options, you’ll be better suited using one of the standard, built-in SwiftUI Picker views.

Example

The following code will create a Picker with four options in iOS:

SwiftletRadioButtonPicker(alignment: .grid, columns: 3, selection:"2")
    .radioButton(id: "0", name: "Option One")
    .radioButton(id: "1", name: "Option Two")
    .radioButton(id: "2", name: "Option Three")
    .radioButton(id: "3", name: "Option Four")

Which would display a view like the following:

Generating from an Enum

Optionally, you can feed any Enum that has a raw value and conforms to CaseIterable, Identifiable to the radioButtons function and the Picker will automatically generate a list of Radio Buttons from the Enum.

Example

Given the following Enum:

/// Defines the format of the barcode to be generated.
public enum BarcodeFormat:String, Codable, Equatable, CaseIterable, Identifiable {
    
    /// Sepcifies a type 128 barcode.
    case code128 = "CICode128BarcodeGenerator"
    
    /// Sepcifies a type PDF 417 barcode.
    case pdf417 = "CIPDF417BarcodeGenerator"
    
    /// Sepcifies an Aztec type barcode.
    case aztec = "CIAztecCodeGenerator"
    
    /// Sepcifies a QR Code type barcode.
    case qrCode = "CIQRCodeGenerator"
    
    public var id:String {
        return rawValue
    }
    
    
    /// Sets the enum from the given `String` value.
    /// - Parameter name: The `String` name that matches a case from the enum.
    /// - Remark: Will default to `code128` if the name cannot be found.
    public mutating func fromName(_ name:String) {
        switch(name.lowercased()) {
        case "code128":
            self = .code128
        case "pdf417":
            self = .pdf417
        case "aztec":
            self = .aztec
        case "qrcode":
            self = .qrCode
        default:
            self = .code128
        }
    }
}

And the following code to call the Picker:

SwiftletRadioButtonPicker(alignment: .grid, title:"Select barcode format:", columns: 3, selection:"code128") { button in
    card.format.fromName(button.id)
    store.refreshUI()
}
.radioButtons(from: BarcodeFormat.self)

Would create a Picker that looks similar to the following on iOS: