What is the advantage of using OperationQueue over GCD for managing asynchronous tasks?

OperationQueue provides a higher level of abstraction compared to GCD (Grand Central Dispatch) and has several advantages when managing asynchronous tasks:

• Dependency management: you can set dependencies between operations to ensure the execution order.
• Priorities and cancellation: easily set task priorities and cancel them if necessary.
• Reusability: operations can be reused and combined.
• Control over the number of concurrent tasks: you can limit the maximum number of operations executing simultaneously.

Example of using OperationQueue:

let queue = OperationQueue()

let operation1 = BlockOperation {
    print("Task 1")
}

let operation2 = BlockOperation {
    print("Task 2")
}

operation2.addDependency(operation1) // operation2 will execute after operation1

queue.addOperations([operation1, operation2], waitUntilFinished: false)

Thus, OperationQueue is more convenient for complex task management scenarios than low-level GCD.