void函数中出现意外的非void返回值 [英] Unexpected non-void return value in void function

问题描述

我正在执行HTTP请求并在 func 中获得响应。它返回响应的值。我是这样做的：

I am doing the HTTP request and getting response in my func. It return the value of response. I am doing it this way:

NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) {(response, data, error) in
        println(NSString(data: data, encoding: NSUTF8StringEncoding))
        stringResponse = NSString(data: data, encoding: NSUTF8StringEncoding) as! String
        if stringResponse == "0" {
            return false
        } else if stringResponse == "1" {
            return true
        } else {
            return false
        }
    }

但是在所有上返回 s我有错误 void函数中出现意外的非void返回值如何解决这个问题？

But on all returns I have error Unexpected non-void return value in void function How to fix this?

推荐答案

如果您在得到回复后想要该值，请执行此操作。

Do this if you want the value after you get response.

func getResponse(completionHandler : ((isResponse : Bool) -> Void)) {

NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) {(response, data, error) in
        println(NSString(data: data, encoding: NSUTF8StringEncoding))
        stringResponse = NSString(data: data, encoding: NSUTF8StringEncoding) as! String
        if stringResponse == "0" {
           completionHandler(isResponse : false)
        } else if stringResponse == "1" {
           completionHandler(isResponse : true)
        } else {
           completionHandler(isResponse : false)
        }
    }
}

现在你可以在任何地方打电话给它。

Now you call it as below from where ever you are calling.

classObject.getResponse {(isResponse) -> Void in 

//Do your stuff with isResponse variable.
}

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