相关疑难解决方法(0)

鉴于:

typealias Action = () -> ()

var action: Action = { }

func doStuff(stuff: String, completion: @escaping Action) {
    print(stuff)
    action = completion
    completion()
}

func doStuffAgain() {
    print("again")
    action()
}

doStuff(stuff: "do stuff") { 
    print("swift 3!")
}

doStuffAgain()

有没有办法制作类型的completion参数(和action)Action?并保持@escaping？

更改类型会出现以下错误:

error: @escaping attribute only applies to function types

删除@escaping属性,代码编译并运行,但似乎不正确,因为completion闭包正在逃避函数的范围.