Thanks in advance for help, I have two API calls, both are concurrent and any call could be success first(I don't want call in sequence), after success of both calls, I have to stop my activity indicator and reload my tableView, Here is my code but I don't know is this the right way or not and how to reload my tableView and stop my activity indicator.
func downloadDetails(){
let operationQueue: OperationQueue = OperationQueue()
let operation1 = BlockOperation() {
WebServiceManager.getAData(format:A, withCompletion: {(data: Any? , error: Error?) -> Void in
if let success = data {
DispatchQueue.main.async {
(success code)
}
}
})
let operation2 = BlockOperation() {
webServiceManager.getBData(format: B, withCompletion: {(data: Any? , error: Error?) -> Void in
if let success = data {
DispatchQueue.main.async {
(success code)
}
}
})
}
operationQueue.addOperation(operation2)
}
operationQueue.addOperation(operation1)
}
downloadDetails() "calling function"
This is exactly the use case for DispatchGroup. Enter the group for each call, leave the group when the call finishes, and add a notification handler to fire when they're all done. There's no need for a separate operation queue; these are already asynchronous operations.
func downloadDetails(){
let dispatchGroup = DispatchGroup()
dispatchGroup.enter() // <<---
WebServiceManager.getAData(format:A, withCompletion: {(data: Any? , error: Error?) -> Void in
if let success = data {
DispatchQueue.main.async {
(success code)
dispatchGroup.leave() // <<----
}
}
})
dispatchGroup.enter() // <<---
webServiceManager.getBData(format: B, withCompletion: {(data: Any? , error: Error?) -> Void in
if let success = data {
DispatchQueue.main.async {
(success code)
dispatchGroup.leave() // <<----
}
}
})
dispatchGroup.notify(queue: .main) {
// whatever you want to do when both are done
}
}