offscreen dispatch

As a workshop manager, do you have trouble with these problems every day: The data of the workshop production dispatch is not complete, and go back and forth to statistics, records, meetings, mental sickness? Dispatch task can not release, each link is not finished, every day worried? Dispatch workers slow progress, issued by the production task, like a sink, pro

iOS three multithreading technology 1.NSThread each Nsthread object corresponds to one thread, the magnitude is lighter (real multi-threaded) 2. The following two points are Apple's "concurrency" technology specifically developed to allow programmers to stop worrying about thread-specific usage issues ønsoperation/ Nsoperationqueue Object-oriented threading technology Øgcd--grand Central Dispatch (distributed) is a C-based framework that can take full

Reprinted from: Http://blog.sina.com.cn/s/blog_6dce99b10101atsu.html, respecting the original!a detailed description of the concurrency of iOS development applications dispatch queues is the content of this article, we can almost dispatch the queue to complete all the tasks with the thread . Scheduling queues are simpler, easier to use, and more efficient than thread code. The following is a summary of the

What is a dispatch function: Dispatch functions are an important concept in WIndows drivers. The main function of the driver is to handle I/O requests, where most of the I/O requests are handled in the dispatch function. In other words, the dispatch function is used to process the I/O request submitted by the driver.So

[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

We generally use the following dispatch method:Explanation: The first sentence is asynchronous execution, the second sentence is deferred asynchronous execution, the third sentence is to run the background, and then update the UIThe dispatch_get_main_queue represents the application main thread execution, and the UI can be updated internally (without blocking the main thread) The Dispatch_get_global_queue representative runs in the background of the s

Source: https://www.cnblogs.com/yaopengfei/p/9216229.htmlI. BACKGROUNDWe in the daily development, you may encounter such a demand: "3rd per month to send users messages, remind users xxx", "0 points per day need to count the time before the time of attendance record", "1th per month to calculate the inventory situation last month", "timed initialization data for other business use", " Every 2 minutes round the inquiries database to see if a business is audited, and prompts the user "and so on."

, any user can access the database through the browser, thus overcomes the time and the space limit. Figure 1 b/S Mode works: The client browser accesses the Web server through the URL, the Web server requests the database server, and returns the resulting results to the client browser in HTML form. 　　 Functional Modules The system can be divided into several sub modules based on the integration of receiving and sending documents. (1) System Management As a system administrator, he can m

Remember that polymorphism can only be represented by method calls, so if you want to make the double dispatch correct, you must perform two method calls: In each structure, one is used to determine the type. In the trash structure, a new method is invoked to invoke Addtobin (), which takes a parameter that is an array composed of Typebin. The method will iterate through the array, trying to add itself to the appropriate garbage cans, where the doubl

GCD is a pure C language, but it is also soluble in object-oriented thinking, based on block. 1, GCD Advantages: Ease of use: GCD is easier to use than thread, and the block-based feature makes it extremely simple to pass the context between different code scopes. Efficiency: GCD is more practical and fast in many places than it is dedicated to creating threads that consume resources. Performance: GCD automatically increases and decreases the number of threads based on system lo

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 parallel to specific tasks, scheduling them to pe

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 parallel to specific tasks, scheduling them to pe