IOS network image cache details
When developing mobile applications, such as Android and IOS, our mobile applications target the Internet and frequently access the network due to factors such as mobile phone traffic, network speed, and
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
InIn Windows, thread synchronization control can be implemented through Critical Section, Mutex, Semaphore, Event, and other methods.
On the IOS platform, you can use dispatch_semaphore_t for synchronization when using GCD for simple multi-thread
When we load the network, there are two different ways to load the network. One is POST and the other is get.
1. Let's first look at the internal composition instances of the two request methods.
Get request:
GET
IPhone AppThe most common problems for new developers are the content we want to build. Let's just look at the content. ForIPhone AppNew developers summarize the most common problems.
1. How to change the date (note that apple has changed the
This article focuses onIOSOfMulti-core programmingAndMemoryManagement, why? Because iPad 2 is already a dual-core CPU! Although the iPad 1 application is no longer slow, you can use Apple'sMulti-core programmingFramework to write more responsive
Objective-CBasic syntaxClassDefinition is the content to be introduced in this article,Objective-CIs an object-oriented language, soClassIs the basis.Objective-CIt is the super of C, but its syntax is a little different from that of C, especially
IPhoneUsed in applicationsNSLocalizedStringImplementationInternationalizationIt is the content to be introduced in this article. If you do not need to talk about it, go directly to the topic. ObtainInternationalizationInformation
IPhone plottingAboutQuartZMediumDrawThe Line case is the content to be introduced in this article. It mainly introduces howQuartZMediumDrawLine Content, see the details. The following code and examples are from the officialQuartzThe screenshot in
SolutionLua syntaxMissing and alternative measures are the content to be introduced in this article, mainly to understandLUA syntax.LuaA design policy is simple. If you do not want to add any language features, try not to add them. So,LuaSome of the
UseMySQL ProxyRead/writeSeparationNote: This article will introduce the content. You 'd better install it before you start the operation.MySQL-ProxyAnd configure the MySQL master-slave server. Supplement: New VersionMySQLBuilt-in support
Latency
I got an error in XCode 4 Issue Navigator, but in Log Navigator there is no error. After restart XCode, the error was erase.
//************************************** **************************************** ******
I had the same problem in XCode 4: "
Xcode also supports compiling iPhone programs in the form of command lines. In addition, you can manually compile the Makefile file to compile and install the automatic batch processing process. If you are used to the command line operation (linux,
When I first started learning about iPhone development, I would like to share some experiences and experiences on creating simple interfaces, so as not to forget or follow a good record in the future. If there are any deficiencies, please correct
Yesterday afternoon, when my colleague used xcode4.2 to submit an application to the appStore, the following error was prompted:
IPhone/iPod Touch: application executable is missing a required architecture. At least one of the following architecture
In the project, I encapsulated an http request tool class. Because only post requests are used in the project, the get request method is only available at the beginning, the Code is as follows:H file:[Cpp]# Import /** Custom http Proxy*/@ Protocol
After solving the basic OS interface, consider the GUI Design.
The common GUI architecture in the embedded industry is as follows:
IDE (fourth-generation scripting language): converts users' designs into third-generation languages supported by
1. iOS Camera Film and Video Library
Apple suggests:
Uses AVPlayer to play videos from the iPod Library, Camera Roll, or via iTunes File Sharing. Also displays metadata.
You can refer to the official AVPlayerDemo.
2. Play the local video file
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