DispatchQueue<\/strong><\/em> class. You can specify whether the queue is serial or concurrent, and you can also specify a label for the queue to help you identify it. For example:<\/p>\n\r\n\r\nlet queue = DispatchQueue(label: "com.example.myqueue", qos: .utility, attributes: .concurrent)\r\n\r\n<\/pre>\nTo add a task to a queue, you can use the async<\/strong><\/em> function, which takes a closure as an argument and executes it asynchronously on the queue. For example:<\/p>\nqueue.async {\r\n\/\/ Perform some task\r\n}<\/pre>\nYou can also use the sync<\/strong><\/em> function to execute a task synchronously on the queue. This is useful if you need to ensure that a task is completed before proceeding with the rest of your code.<\/p>\nGCD also provides support for group tasks, which allow you to specify a set of tasks that should be executed together. You can use the DispatchGroup class to create a group of tasks, and then use the enter<\/strong><\/em> and leave<\/strong><\/em> functions to add and remove tasks from the group. When all tasks in the group have completed, you can use the notify<\/strong><\/em> function to execute a closure that is called when the group is finished.<\/p>\nIn summary, Grand Central Dispatch is a powerful tool for managing concurrent tasks in Swift. It provides a simple and efficient way to perform tasks asynchronously and improve the performance of your applications. By using GCD, you can write responsive and performant code, without having to worry about the details of thread management.<\/p>\n","protected":false},"excerpt":{"rendered":"
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