JavascriptCore未从类导出方法
我试图从swift类的单例实例调用一个方法 这是我的协议:JavascriptCore未从类导出方法,javascript,ios,swift,javascriptcore,Javascript,Ios,Swift,Javascriptcore,我试图从swift类的单例实例调用一个方法 这是我的协议: @objc public protocol MyProtocol: JSExport { var name: String { get set } func sum(a:Int, b: Int) -> Int } 这是我的班级: private let sharedInstance = MySingleton() @objc public class MySingleton: NSObject, MyPro
@objc public protocol MyProtocol: JSExport {
var name: String { get set }
func sum(a:Int, b: Int) -> Int
}
这是我的班级:
private let sharedInstance = MySingleton()
@objc public class MySingleton: NSObject, MyProtocol {
// Singleton
public class var sharedApp : MySingleton {
return sharedInstance
}
public var username: String
override private init() {
self.username = "Oscar"
super.init()
}
public func sum(a: Int, b: Int) -> Int {
return a + b
}
}
我做了一些测试。当我访问一个属性时,它会传递:
func testName() {
var virtualMachine = JSVirtualMachine()
js = JSContext(virtualMachine: virtualMachine)
var singleton: MySingleton = MySingleton.sharedApp
self.context.setObject(
singleton.self,
forKeyedSubscript: "Singleton")
let name = js.evaluateScript("Singleton.username").toString()
XCTAssertTrue(name == "Oscar", "Name is not Colossal, was " + name); // PASS!!!!!
}
但是,当我调用一个方法时,它会失败:
func testSum() {
var virtualMachine = JSVirtualMachine()
js = JSContext(virtualMachine: virtualMachine)
var singleton: MySingleton = MySingleton.sharedApp
self.context.setObject(
singleton.self,
forKeyedSubscript: "Singleton")
let name = js.evaluateScript("Singleton.sum(3, 2);").toInt32()
XCTAssertTrue(sum == 5, "Sum was " + String(sum)); // Fails. Says sum was 0
}
它仅在从Javascript对象读取/写入属性时起作用,而在调用方法时不起作用
我做错了什么?我刚刚找到了解决办法。试试这个
func sum(a:Int, _ /* <-- make this argument unnamed */ b: Int) -> Int
func和(a:Int,u/*Int)
似乎
JSExport
还不支持命名参数。JSExport确实支持命名参数,您只需将它们添加到函数名中,例如:
swift功能:
func myFunction(param1 : String, param2 : String, param3 : String)
必须从javascript调用:
myFunctionParam2Param3( "a", "b", "c")
在您的情况下,只需调用sumB()而不是sum():
哇,太小了,你真是个救命恩人!
let name = js.evaluateScript("Singleton.sumB(3, 2);").toInt32()