I have an Operation subclass and Operation queue with maxConcurrentOperationCount = 1.
This performs my operations in a sequential order that i add them which is good but now i need to wait until all operations have finished before running another process.
i was trying to use notification group but as this is run in a for loop as soon as the operations have been added to the queue the notification group fires.. How do i wait for all operations to leave the queue before running another process?
for (index, _) in self.packArray.enumerated() {
myGroup.enter()
let myArrayOperation = ArrayOperation(collection: self.outerCollectionView, id: self.packArray[index].id, count: index)
myArrayOperation.name = self.packArray[index].id
downloadQueue.addOperation(myArrayOperation)
myGroup.leave()
}
myGroup.notify(queue: .main) {
// do stuff here
}
myGroup.leave()
in the completion block for the operation. – danqueuePriority
and become ready in the order they were added to the serial queue. See the "Determine the Execution Order" section in the OperationQueue docs here – Left as an exercise