how to upload image in background in swift using GCD

Question

i used the following code to upload image to server in background

var queue = dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0)
    dispatch_async((queue), {
        self.StartUploadProcess()//upload function
    })

the above code run perfectly in simulator but when i test the application on my iPad it will stop the background execution when user click home button or open other application

please help me so i can run the application even the user click on home button?

Answer 1

The point of dispatch_sync() is to run the code in another thread synchronously . There is also dispatch_async() which runs asynchronously , that is, in the background.

From your question I assume you already know how to run it when you want to, just need to make it into an async call.