How to call a method with completion handle in swift 3+ - ios

Question

I am very new to swift. I have a method like this.
public func prepareUrl (appendString:String,bindedParams:String,isAuthorized:Bool,isGet:Bool,jsonBody:[String:String],completion:#escaping(String)->Void)
{
let baseUrl=Bundle.main.value(forKey: "GlobalURL")
let urlString=baseUrl as! String+appendString as String+bindedParams as String
Alamofire.request(urlString, method: .get, parameters: nil, encoding: JSONEncoding.default)
.downloadProgress(queue: DispatchQueue.global(qos: .utility)) { progress in
print("Progress: \(progress.fractionCompleted)")
}
.validate { request, response, data in
// Custom evaluation closure now includes data (allows you to parse data to dig out error messages if necessary)
return .success
}
.responseJSON { response in
debugPrint(response)
}
}
I have no idea how to call this method since it's having a completion handler part too. How can I call this method. Please help me.
Thanks

Answer 1

To call method like this:
self.prepareUrl(appendString: "www.some.com/api/likeLogin", bindedParams: "name=lee", isAuthorized: false, isGet: true, jsonBody: ["key":"value"]) { (returnString) in
if returnString == "someValue" {
//do something
}
else{
}
}
And in the method, you should call the completion to return value, like:
.responseJSON { response in
completion("aReturnString")
}
Although the method name is prepareUrl, it actually requests the WebApi, so it's better to rename it to request.

Answer 2

Try this :
NOTE :This answer is for example . You need to change as per your needs
func getResponse(url: String, method : HTTPMethod, parameter : [String : AnyObject], Alert : Bool, callback: #escaping responseHandler) -> Void{
Alamofire.request(API_PREFIX + url, method: method, parameters: parameter).validate().responseJSON { response in
switch response.result {
case .success:
if let result = response.result.value {
let JSON = result as! [String : AnyObject]
print("\(JSON as AnyObject)")
callback(JSON as AnyObject, true)
}
case .failure(let error):
print(error)
callback({} as AnyObject, false)
}
}
}
Calling of method using closure
self.getResponse(url: "", method: .post, parameter: ["Email" : "" as AnyObject, "Password" : "" as AnyObject], Alert: true) { (responseObject, success) in
if success{
}
}