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[52 Effective ways to write high-quality iOS code] (10) Grand Central Dispatch (GCD)Reference book: "Effective Objective-c 2.0", "English" Matt GallowaySneak Peek41. Multi-use dispatch queue, less use of synchronous lock42. Multi-use GCD, less use Performselector series method43. Mastering the time of GCD and Operation queue44. Perform tasks based on system resource status through the dispatch group mechani

Introduced:The Grand Central Dispatch abbreviation (GCD) is the technology developed by Apple to optimize applications that support multi-core processors and other symmetric multi-processing systems. This is based on the thread pool pattern that the task executes in parallel. It was first released on Mac OS X 10.6, and IOS 4 and above are also available.Design:GCD works by allowing programs to queue in para

Introduced:The Grand Central Dispatch abbreviation (GCD) is the technology developed by Apple to optimize applications that support multi-core processors and other symmetric multi-processing systems. This is based on the thread pool pattern that the task executes in parallel. It was first released on Mac OS X 10.6, and IOS 4 and above are also available.Design:GCD works by allowing programs to queue in para

Grand Central Dispatch (GCD) for iOS multi-thread programming)Introduction: Grand Central Dispatch (GCD) is a technology developed by Apple to optimize applications that support multi-core processors and other systems of Symmetric Multi-processing systems. This is based on the Thread Pool Mode for concurrent task execu

First, introduce several concepts: GCD, queue, serial, parallel, synchronous, asynchronous. GCD (Grand Central Dispatch ): The Great Apple developed a multi-core multi-thread solution. Is a C language-based underlying API Defining tasks with blocks is flexible and convenient to use. Provides more control capabilities and underlying functions not available in the Operation queue The

, ^{instance = [[AddressBook alloc] init]; });returninstance;}//alloc will automatically call Allocwithzone://zone Space Allocation memory space (zone), creating objects+ (ID) Allocwithzone: (Nszone *) zone{if(Instance = =Nil) {instance = [SuperAllocwithzone:zone]; }returninstance;}@end4. Summary: Security: No locking or other synchronization mechanisms are required. Take advantage of multi-core All multithreaded code is centralized for easy maintenance No practical @autorel

Introduction:The full name of GCD is the Grand Central Dispatch, an API that Apple has published in iOS4.0 to handle concurrency. Its purpose is to improve the processor's multi-core computing capabilities.GCD is a bit like nsoperationqueue, which allows programs to split a task into multiple single tasks and commit to a work queue to execute concurrently or serially, but GCD is more efficient than nsoperti

1,swift continues to use Object-c's original set of threads, including three multithreaded programming techniques:(1) Thread(2) Cocoa operation (operation and Operationqueue)(3) Grand Central Dispath (GCD)2, this article highlights the Grand Central Dispath (GCD)GCD is a multi-core programming solution developed by App

Grand Central Dispatch (GCD) is a powerful way to perform multithreaded tasks, whether you are asynchronous or synchronous at the time of the callback, and you can optimize the application to support multi-core processors and other symmetric multi-processing systems. In the process of development, only the tasks to be executed and added to the appropriate dispatch queue, GCD can generate the necessary threa

Introduced:The Grand Central Dispatch abbreviation (GCD) is the technology developed by Apple to optimize applications that support multi-core processors and other symmetric multi-processing systems. This is based on the thread pool pattern that the task executes in parallel. It was first released on Mac OS X 10.6, and IOS 4 and above are also available.Design:GCD works by allowing programs to queue in para

The Grand Central Dispatch abbreviation (GCD) is the technology developed by Apple to optimize applications that support multi-core processors and other symmetric multi-processing systems. This is based on the thread pool pattern that the task executes in parallel. It was first released on Mac OS X 10.6, and IOS 4 and above are also available.Design:GCD works by allowing programs to queue in parallel to spe

problems, for example, retain delegate causes loop reference; or assign delegate is not properly managed, and a wild pointer is displayed. This type of problem can discourage common developers. Ios4 introduces block programming and gcd (Grand Central Dispatch) task queue management. Here we will not go to the layout to introduce the boring syntax. If you have any requirements, please read the documents by

Introduction: Grand Central Dispatch (GCD) is a technology developed by Apple to optimize applications that support multi-core processors and other systems of Symmetric Multi-processing systems. This is based on the Thread Pool Mode for concurrent task execution. It is released on Mac OS X 10.6 For the first time, and is also available for iOS 4 and later versions.Design: GCD works as follows: allows progra

Exploring multi-thread programming in iOS development: Grand Central Dispatch details, multi-thread programming dispatch I have published a blog about multithreading development in iOS, which introduces NSThread, Operation queue, and GCD. Today, we will give a comprehensive summary of how GCD is used. The history and benefits of GCD are not described too much here. This blog will summarize GCD through a ser

Grand Central Dispatch (GCD) is a new solution developed by Apple for multi-core programming. It was first launched in Mac OS X 10.6 snow leopard and recently introduced to ios4.0. GCD is an efficient and powerful technology that replaces technologies such as nsthread. GCD can fully handle asynchronous programming issues such as data locking and resource leakage. GCD can accomplish many things, but this art