Swift multiple requests return the same result - ios

Question

Im making synchronous api calls to an API and in the debugger I see that I am getting different results. However my code always returns the same Id:
func fetchIDbySKU(name: String, color: String) -> Data{
let sku = name + ":" + color
let appendedsku = (sku).addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
let url: String = "https://www.link.com/wp-json/wc/v1/products?sku=" + appendedsku!
let semaphore = DispatchSemaphore (value: 0)
var result = Data()
var request = URLRequest(url: URL(string: url)! ,timeoutInterval: Double.infinity)
request.addValue("Basic secret token", forHTTPHeaderField: "Authorization")
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data else {
print(String(describing: error))
return
}
print(String("______________________________________"))
print(String(data: data, encoding: .utf8)!)
result = data
print(String("______________________________________"))
semaphore.signal()
}
task.resume()
semaphore.wait()
return result
}
so result is always returning the same result even though I in the console I an see that the response data is different.
This is the code where I am expecting the return:
var request_data = fetchIDbySKU(name: name, color: color_name)
var product_id = String(request_data[0])
parts_list.append(Item(product_id: product_id, quantity: quantity))

Answer 1

Your semaphore is initialized every time the function is called. Just take out the initialization of your semaphore out of the function and it will work fine.
let semaphore = DispatchSemaphore (value: 0)
func fetchIDbySKU(name: String, color: String) -> Data{
let sku = name + ":" + color
let appendedsku = (sku).addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
let url: String = "https://www.link.com/wp-json/wc/v1/products?sku=" + appendedsku!
var result = Data()
var request = URLRequest(url: URL(string: url)! ,timeoutInterval: Double.infinity)
request.addValue("Basic secret token", forHTTPHeaderField: "Authorization")
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data else {
print(String(describing: error))
return
}
print(String("______________________________________"))
print(String(data: data, encoding: .utf8)!)
result = data
print(String("______________________________________"))
semaphore.signal()
}
task.resume()
semaphore.wait()
return result
}