function is returning before the API service is being called iOS

Question

I am trying to return the "cardsarray" which contain the name, designation, and 4 more fields. When API is being called it returns the array of object which gets stored into my array.

But when I run the application doesn't show anything in the table view.

I tried some print statement. It came out that the function is returning before the API is being called. Not able to understand why. Please help

 {
    designation = "Manager";
    email = "Sample@gmail.com";
    mobile =1234567899;
    name = "Sample";
    status = 0;
    Company = "ABC Corp"

},
    {
    "pending_staff_pic" = 1;
}

You are missing the concept of Asynchronism. Look for "Swift + Closure + Async" to know how manage it. — Larme, Oct 16 '18 at 10:04
Never include code as a screenshot in your question. Include it as text using proper code formatting. — Dávid Pásztor, Oct 16 '18 at 10:05
better use completion handler to get insured that the statement is executed. — Mohit G., Oct 16 '18 at 10:22
@DávidPásztor I will make sure to add code snippet next time. — Shivam Srivastava, Oct 16 '18 at 10:54

Sharad Chauhan · Accepted Answer · 2019-03-05T06:01:45.813

2

As suggested by Larne, you need to understand the asynchronous calls.

First you need to have a completion block in your function like this :

func getCards(completion: @escaping (([Cards]) -> Void)) {

}

The after your for loop where you are printing cardsArray you need to write this completion block.

completion(dataArray)

And this is how you have to call this fucntion :

getCards { (cardsArray) in

}

edited Mar 05 '19 at 06:01

answered Oct 16 '18 at 10:13

Sharad Chauhan

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thank you, brother, for your help. I got the code working. – Shivam Srivastava Oct 16 '18 at 13:57

function is returning before the API service is being called iOS

1 Answers1