IOS

One-dimensional code: Barcode QR code: Two-dimen1_barcode In iOS, there are mainly two open-source libraries that can be used to process bar codes: 1. zxing: http://code.google.com/p/zxing 2, zbar: http://zbar.sourceforge.net/ Both

1. url Encoding When the HTTP request in IOS encounters Chinese characters, it needs to be converted into a UTF-8, the method used is: Nsstring * encodingstring = [urlstring stringbyaddingpercentescapesusingencoding: nsutf8stringencoding]; 2. URL

In iOS, persistence makes good use of several methods. We have already introduced two methods: simple file writing and serialization and file writing, now we will introduce the basic application of the embedded database sqlite3 in IOS. Before using

Today I learned how to use core data for persistence in IOS. First of all, I want to understand this. Core data is a stable and comprehensive persistence tool. Compared with some previous persistence tools, it does not need to archive objects, that

Specified device Resource The file name format is as follows: . indicates the original name of the resource file and the name of the file accessed by the Code; is the standard file extension; indicates the modifier specified by the device:~ IPad:

Create empty applicaton and add the homeviewcontroller file. Let's look at the code. The theory is too boring and will be mentioned in the code. Homeviewcontroller. H code:# Import # import @ interface homeviewcontroller: uiviewcontroller {}@

Using GPS in IOS apps is roughly divided into the following two steps: 1. Adding corelocation. Framework; 2. Generating the cllocationmanager measurement position. The test code is as follows: // Locationviewctrl. h# Import # Import @ Interface

Xcode4 settings are not the same: find arguments in edit-> Scheme (in xcode 4.2, choose product-> edit Scheme) Set the following three values to yes. NtutoreleasefreedobjectCheckenabled Nszombieenabled NsdebugenabledAlso reprinted 2 debugging

iBoot-99 1.0b (Build 1A420) [Unreleased]iBoot-159 1.0 (Build 1A543a) 1.0.1 (Build 1C25) 1.0.2 (Build 1C28)iBoot-204 1.1 (Build 3A100) 1

1 Preface In iOS development, I believe you have heard of delegation, data sources, targets, actions, and so on. Today we will simply learn about these contents.2. Details 2.1 delegation and data sources Have you ever wondered how to execute a task?

1 Preface During this time, I learned the basic things of iOS, and the theory needs to be related to the actual situation. I do not want to look for several open-source project codes for research. I am suffering from technical limitations, at the

About synchronous ios6 and ios5 rotating screens As we all know, ios6 does not support shouldautorotatetointerfaceorientation and forcibly opens all the direction of the project, which will cause inconvenience to some projects, especially when

Document directory Design Mode: design template for Solving Programming Problems The most important design pattern: Model-View-Controller Use design patterns to solve problems Title: Use design patterns to rationalize your applicationsUse

Document directory Various problems may occur during the process of adding. At this time, we need to determine what is not written or what is not done: 1. For definition in the class, be sure to add IBOutlet 2. associate with the class 3. Be

What does the iPhone SDK contain? Apple released most of the system interfaces to the special data packets such as the framework. A framework is a directory that contains a dynamic shared library and resources required to use the library (such as

The content is actually very simple, but sometimes we forget it. When we set rightBarButton/leftBarbutton, sometimes we find that the system is not very nice and we want to customize it. So we have this idea: Directly add the Code as follows:

The following C function can be used to check whether your program is being debugged:   static bool debuggerRunning(void){ int junk; int mib[4]; struct kinfo_proc info; size_t size; 

Because the project needs to write text on the UISwitch button, the UISwitch that comes with the system is like this: I can neither write nor change the color, so I found such a custom Switch button on the Internet. The specific source is missing.

There are two main methods for xmpp file transmission:The Protocol corresponding to 1 socks5 bytestreams is XEP-0065The Protocol for 2 In-Band Bytestreams (ibb) is XEP-0047 The advantage of the socks5 Bytestreams method is high efficiency, but a

  Too lazy to typeFrom: http://www.cnblogs.com/uvsjoh/archive/2012/09/02/2667348.html 1. In-band RegistryIn-band registration means that users who have not activated an account on your server can register a new account through the xmpp protocol. The