Question

我试图创建一个自定义Action对象数组，每个对象都有一个可以在以后调用的闭包。我在这做错了什么？我该怎么办关闭？

let actionOne = Action(title: "1", image: "blue") {
            println("1 blue")
}

let actionTwo = Action(title: "2", image: "yellow") {
            println("2 yellow")
}


var actions: Array<Action> = [actionOne, actionTwo]


// how to run the closure from actionOne?
actionOne.closure() // compile error: invalid use of '()' to call a value of a non-function type '()?'



-----

class Action {

    var title: String?
    var image: String?
    var closure: ()?

    init(title: String, image: String, closure: () -> ())  {
        self.title = title
        self.image = image
        self.closure = closure()
    }
}

Answer 1

class Action {

    let title: String
    let image: String
    let closure: () -> ()

    init(title: String, image: String, closure: () -> ())  {
        self.title = title
        self.image = image
        self.closure = closure
    }
}

let actionOne = Action(title: "1", image: "blue") {
    println("1 blue")
}

let actionTwo = Action(title: "2", image: "yellow") {
    println("2 yellow")
}


var actions: Array<Action> = [actionOne, actionTwo]


actionOne.closure()

传递闭包以便稍后调用

1 个答案: