swift - 向 Alamofire 添加完成处理程序

Question

我正在编写一小段 Swift 代码，用于通过基于网络的 API 提取数据。现在我很接近，但是当我在 getUserInfo() 预期数据中打印数据时，我认为我缺少完成处理程序方面，但在该函数之外，出现初始化的默认数据。该函数是这样调用的:

print("Provided Username is: \(workingData.user)")
getUserInfo()
print("Returned String Data is: \(workingData.responseDataString)")

和实际功能:

func getUserInfo() {
    Alamofire.request(workingjss.jssURL + devAPIMatchPath + workingData.user, method: .get)
        .authenticate(user: workingjss.jssUsername, password: workingjss.jssPassword).responseString { response in
            if (response.result.isSuccess) {
                print("In Function Data: \(response.result.value!)"
                workingData.responseDataString = response.result.value!
            }
    }
}

运行代码的输出是:

Provided Username is: MYUSER
Returned String Data is: Nothing Here Yet 
In Function Data: {"Cleaned JSON Data here"}

完成处理程序会帮助解决问题吗？我对使用 Alamofire 很陌生，如果这很简单，我很抱歉。谢谢!

Answer 1

尝试使用完成处理程序:

func getUserInfo(completion: @escaping (String) -> Void) {
    Alamofire.request(workingjss.jssURL + devAPIMatchPath + workingData.user, method: .get)
        .authenticate(user: workingjss.jssUsername, password: workingjss.jssPassword).responseString { response in
            if (response.result.isSuccess) {
                print("In Function Data: \(response.result.value!)"
                completion(response.result.value!)
            }
    }
}

然后这样调用它:

getUserInfo() { response in
    // Do your stuff here
    workingData.responseDataString = response
    print("Returned String Data is: \(workingData.responseDataString)")
}