IOS Study Notes-multithreading (simple Ticketing System)

A process is the smallest unit of system resource management. A thread is the minimum unit of execution. Multithreading is a process that contains multiple threads. Data of a process is loaded into a memory interval, and threads share the same

Parse XML files using Dom and Sax in IOS

XML parsing class in IOS: Click to open the link There are two methods for parsing XML files in IOS: Dom and Sax. However, we recommend that you use the method recommended officially by Apple. Sax parsing relies mainly on proxy methods.

IOS uses the accelerator sensor to make football on the cell phone screen roll back and forth

Friends who have used 360 security guard should know that sometimes 360 security guard comes back with a small ball, letting you shake your cell phone to calculate the heat you consumed. This is very interesting, in fact, this function is very

IOS observer mode and notification center

The observer mode of IOS is not as frequently used as the proxy method in IOS. In most cases, from tableView to textField, both define proxy and implement proxy for function callback. The observer mode can only be used when the notification center

Introduction to Blocks in iOS

1. What is Blocks? Blocks is an extension of C language. An anonymous function with automatic variables can be summarized in one sentence. When I saw Blocks for the first time, I felt very similar to the function pointers in C language, especially

The tool class EPUploader for uploading files to the server on ios

Header file #import @interface EPUploader : NSObject { NSURL *serverURL; NSData *file; id delegate; SEL doneSelector; SEL errorSelector; BOOL uploadDidSucceed;}- (id)initWithURL: (NSURL *)serverURL file:

Ios -- store data in a sandbox

Store data in sandboxFirst, find the sandbox path and use the following code NSArray * arr = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSAllDomainsMask, YES );NSString * path = [arr objectAtIndex: 0133 bytes if the path for storing

How is iOS & quot; Painting & quot?

What is a drawing engine? If you are engaged in graphics/interface development or game development on other platforms, you must know that no matter how the upper-layer UI is presented and responded, there must be a drawing engine at the bottom layer.

Implementation of the QR code function under ios7

After Apple upgraded to IOS7, its PassBook comes with the QR code scanning function. Therefore, the QR code function does not need to be used in third-party libraries. Before use, please first import AVFoundation. frameWork // YHQViewController. m /

The Status Bar of iOS 7 hides differences

InOn iOS 7There are two ways to hide the status bar First approach, Add or modify the following three items in the Info information of the project, and set the corresponding values to achieve the expected purpose: Status bar is initially hidden =

OpenGL ES Native Development Environment Xcode project establishment on iOS platform

The following build process is based on the hardware and software environment: Launch: 8 GB memory 2012 gb ssd for Mac Book Air Operating System: OS x 10.9.1 Development tools: Xcode 5 1. Create an empty iOS project in Xcode Click Next. The

IOS learning notes-Table view 1 (create)

There is no limit on the number of rows in the IOS table. The number of rows is limited by the available storage space. The table has only one column. Is an instance of the UITableView class. The table view does not store data in the table. Table

Detailed description of LUA development tool and its environment Configuration

LUA Development ToolAnd its environment configuration is the content to be introduced in this article, mainly to understand and learnLua Development ToolFirst contact with the Environment ConfigurationLUAThen, study with me. You can't be fooled. LUA

Ubuntu LUA installation environment

AboutUbuntu LUA InstallationEnvironment is the content to be introduced in this article, mainly to understandLuaInUbuntuUnderInstallEnvironment. For more information, see this article.LuaIt is an extended programming language designed to support

Detection of endless loops in Lua scripts and Solutions

DetectionLua scriptThe dead loop and solution are described in this article.LUADuring the test, the endless loop is often caused by any reason, so this article will solve this problem and let's look at the content. LuaIs a small and exquisite

Mysql Proxy Lua read/write splitting settings

Mysql Proxy LuaRead/writeSeparationSettings are the content to be introduced in this article.Mysql ProxyOfMysql isolationSettings for MySQL read/write in the futureSeparationFirstMySQLOfficialMysql ProxyThe product was initially tested. The

Build a Lua installation environment in Ubuntu

InUbuntuBuild an environmentLua installation environmentIt is the content to be introduced in this article. Lua is an extended programming language which is designed to support generic procedural programming and has relevant data description

Apple upgraded iOS 5 to solve the problem that iPhone 4S consumes too much power

According to TechCrunch, Apple released iOS 5 upgraded to iOS 5.0.1 on Thursday to solve the problem that iPhone 4S consumes too much power. Some iPhone 4S users have complained that the battery capacity of their mobile phones is insufficient. Even

How Chinese developers join the iPhone developer Alliance (iDP)

1. Visit http://developer.apple.com/iphone/program/apply.html and click the apply Now link in the middle of the page to go to the iPhone Developer Program Enrollment page. 2. Click "Create Apple ID" to connect and enter various information as

Actually recovered IOS 2950 vswitch

I tried to use two switches for an experiment. However, after entering one of the switches through the console port, I found that the IOS file of the switch was lost. After entering the switch normally, it should first enter the user mode, and the

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