FreSwift

Example Xcode projects showing how to create AIR Native Extensions for iOS, tvOS & macOS using Swift.
It supports iOS 11.0+, tvOS 11.1+, macOS 10.13+

Xcode 14.2 (14C18) must be used with Apple Swift version 5.7.2 (swiftlang-5.7.2.135.5 clang-1400.0.29.51)

It is not possible to mix Swift versions in the same app. Therefore all Swift based ANEs must use the same exact version.

This project is used as the basis for the following ANEs
Firebase-ANE
Vibration-ANE
GoogleMaps-ANE
AdMob-ANE
WebViewANE
AR-ANE
ML-ANE

Getting Started

A basic Hello World starter project is included for each target

How to use

Full documentation is provided

The following table shows the primitive as3 types which can easily be converted to/from Swift types

Basic Types

let myString: String? = String(argv[0])
let myInt = Int(argv[1])
let myBool = Bool(argv[2])

let swiftString = "I am a string from Swift"
return swiftString.toFREObject()

Creating new FREObjects

let newPerson = FREObject(className: "com.tuarua.Person")

// create a FREObject passing args
// 
// The following param types are allowed: 
// String, Int, UInt, Double, Float, CGFloat, NSNumber, Bool, Date, CGRect, CGPoint, FREObject
let frePerson = FREObject(className: "com.tuarua.Person", args: "Bob", "Doe", 28, myFREObject)

Calling Methods

// call a FREObject method passing args
// 
// The following param types are allowed: 
// String, Int, UInt, Double, Float, CGFloat, NSNumber, Bool, Date, CGRect, CGPoint, FREObject
let addition = freCalculator.call(method: "add", args: 100, 31) {

Getting / Setting Properties

let oldAge = Int(person["age"])
let newAge = oldAge + 10

// Set property using braces access
person["age"] = (oldAge + 10).toFREObject()

// Create using FreObjectSwift allowing us to get/set properties using inferred types
// The following param types are allowed: 
// String, Int, UInt, Double, Float, CGFloat, NSNumber, Bool, Date, CGRect, CGPoint, FREObject
if let swiftPerson = FreObjectSwift(className: "com.tuarua.Person") {
    let oldAge:Int = swiftPerson.age
    swiftPerson.age = oldAge + 5
}

Arrays

let airArray: FREArray = FREArray(argv[0])
// convert to a Swift [String]
let airStringVector = [String](argv[0])

// create a Vector.<com.tuarua.Person> with fixed length of 5
let myVector = FREArray(className: "com.tuarua.Person", length: 5, fixed: true)
let airArrayLen = airArray.length

// loop over FREArray
for fre in airArray {
    trace(Int(fre))
}

// set element 0 to 123
airArray[0] = 123

// push 2 elements to a FREArray
airArray.push(66, 77)

// return Int Array to AIR
let swiftArr: [Int] = [99, 98, 92, 97, 95]
return swiftArr.toFREObject()

Sending Events back to AIR

trace("Hi", "There")

// with interpolation
trace("My name is: \(name)")

dispatchEvent("MY_EVENT", "this is a test")

Bitmapdata

if let img = UIImage(freObject: argv[0]) {
    if let rootViewController = UIApplication.shared.keyWindow?.rootViewController {
        let imgView: UIImageView = UIImageView(image: img)
        imgView.frame = CGRect(x: 0, y: 0, width: img.size.width, height: img.size.height)
        rootViewController.view.addSubview(imgView)
    }
}

ByteArrays

let asByteArray = FreByteArraySwift(freByteArray: argv[0])
if let byteData = asByteArray.value { // NSData
	let base64Encoded = byteData.base64EncodedString(options: .lineLength64Characters)
}

Error Handling

FreSwiftLogger.shared.context = context

guard FreObjectTypeSwift.int == expectInt.type else {
    return FreError(stackTrace: "",
        message: "Oops, we expected the FREObject to be passed as an int but it's not",
        type: .typeMismatch).getError(#file, #line, #column)
}

Advanced Example - Extending. Convert to/from SCNVector3

public extension SCNVector3 {
    init?(_ freObject: FREObject?) {
        guard let rv = freObject else { return nil }
        let fre = FreObjectSwift(rv)
        self.init(fre.x as CGFloat, fre.y, fre.z)
    }
    func toFREObject() -> FREObject? {
        return FREObject(className: "flash.geom.Vector3D", args: x, y, z)
    }
}

public extension FreObjectSwift {
    public subscript(dynamicMember name: String) -> SCNVector3? {
        get { return SCNVector3(rawValue?[name]) }
        set { rawValue?[name] = newValue?.toFREObject() }
    }
}

applicationDidFinishLaunching

The static library contains a predefined +(void)load method in FreMacros.h. This method can safely be declared in different ANEs. It is also called once for each ANE and very early in the launch cycle. In here the SwiftController is inited and onLoad() called. This makes an ideal place to add observers for applicationDidFinishLaunching and any other calls which would normally be added as app delegates, thus removing the restriction of one ANE declaring itself as the "owner".
Note: We have no FREContext yet so calls such as trace, dispatchEvent will not work.

@objc func applicationDidFinishLaunching(_ notification: Notification) {
   appDidFinishLaunchingNotif = notification //save the notification for later
}
func onLoad() {
    NotificationCenter.default.addObserver(self, selector: #selector(applicationDidFinishLaunching),
    name: UIApplication.didFinishLaunchingNotification, object: nil)    
}

Required AS3 classes

com.tuarua.fre.ANEUtils.as and com.tuarua.fre.ANEError.as and avmplus.DescribeTypeJSON are required by FreSwift and should be included in the AS3 library of your ANE

Prerequisites

You will need

• Xcode
• IntelliJ IDEA
• AIR 50.1+
• wget on macOS via brew install wget
• Carthage