向Alamofire添加完成处理程序

Question

我正在处理一小段Swift代码，以通过基于Web的API提取数据。现在我接近了，但是当我在getUserInfo（）中打印数据时，认为我缺少完成处理程序方面的预期数据，但在该函数外部，出现了初始化的默认数据。该功能被称为像这样：

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

和实际的功能：

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! 
      } 
    } 
} 

中运行代码的输出是：

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

会完成处理程序帮助的问题了呢？我非常喜欢与Alamofire合作，所以很抱歉，如果这是一件容易的事情。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!) 
      } 
    } 
} 

，并调用它像：

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