Alamofire service calls multiple times - ios

Question

Alamofire.request("https://example.com/writecomment.php", method: .post, parameters: parameters).validate().responseJSON { response in
switch response.result {
case .success:
if let json = response.result.value {
var success = 0
if let dictJSON = json as? [String: AnyObject] {
if let successInteger = dictJSON["success"] as? Int {
success = successInteger
if success == 1
{
//succes
}
}
}
}
case .failure(_):
return
}
}
This is connected to an UIButton action
It SOMETIMES triggers service calls multiple times when user tap button.
How to prevent multiple calls?

Answer 1

Example::
var isAPICalling = false
#IBAction func btnTapped(_ sender: UIButton) {
if isAPICalling == false
{
isAPICalling = true
self.APICalling() // Your API calling method
}
}
In APICalling() method set isAPICalling = false when you get response.
OTHER OPTION :
Use ActivityIndicator when you request that time start indicator and after response stop indicator. So you cannot able to tap on button.

Answer 2

You can do one thing without using flag, if you have button outlet then just make button state selected when button click action is performed.
then call API and once you get the response make button state normal. so it will call only once when user click on button.
#IBAction func btnApiAction(_ sender: Any) {
if btnAPI.isSelected == false {
btnAPI.isSelected = true
//Call API here
}else {
//Do nothing here
}
}
if API Call is get failed or if you are getting any error then also change button state to normal so user can click again on button.

Answer 3

Disable UIButton when you call API. And enable back when api call finished.
#IBAction func didTapButton(_ sender: UIButton) {
sender.isEnabled = false
Alamofire.request(/* Params */) { response in
sender.isEnabled = true
// parse response - response.result
}
}
I prefer to add ActivityIndicatorView to the button view, and remove when finished for better UX.