如何收集函数的返回值(Swift 3) [英] How to collect the return value of a function (Swift 3)
问题描述
我想收集函数的返回值。 问题:
如何在不通过参数的情况下调用'test'函数来收集返回变量'name'?
有没有办法收集变量(值)从函数与agruments(参数),而不通过参数?
我提供了一个例子:
let userName =Jake
let userInfo = test(name:userName)
func test(name:String) - >字符串{
返回名称
}
//函数调用
//目标:我想在不传递参数的情况下检索函数返回值
让newUser = test()
是否必须存储函数'test'返回值检索它?
我想检索'userName'Jake
您可以 return
像下面这样,
let userName =Jake//类的全局变量
let userInfo = test()// Jake
func test() - >字符串{/ /单元素元组将不会有返回标签。
返回self.userName
}
如果您喜欢返回
与标签
然后您需要拖拽或更多
返回值如下所示,
func test() - > (name:String,age:Int){
return(self.userName,125)
}
通过 test()访问特定的值。name
Goal: I want to collect the return value of a function.
Question: How can I call the 'test' function to collect the return variable 'name' without passing through a parameter?
Is there a way to collect a variable(values) from functions with agruments(parameters) without passing through a parameter?
I have provided an example:
let userName = "Jake"
let userInfo = test(name: userName)
func test(name: String) -> String {
return name
}
// function call
// Goal: I want to retrieve the function return value without passing a parameter
let newUser = test()
Does the function 'test' return value have to be stored to retrieve it? I want to retrieve the 'userName' Jake
You can return
like below,
let userName = "Jake" //Global variable of the class
let userInfo = test() //Jake
func test() -> String { //single - element tuple will don't have label for return.
return self.userName
}
If you like to return
with labels
then you need tow or more
return values like below,
func test() -> (name:String,age:Int) {
return (self.userName,125)
}
And access specific values by test().name
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