Error about iOS 5 cocould not instantiate class named nslayoutconstraint

Because xcode 4.6.2 is used, SDK 6.1 is used when a new project is created, but it must be adapted to a lower version. This error occurs when the IOS simulator is selected as 5.0 during compilation and running.Cocould not instantiate class named

[IOS] xcode4/ios5 solution for uncaughtexception crash when the first throw call stack does not print the method name

When I recently connected ios5.0.1 to a real machine for debugging, I found that uncaughtexception caused crash and then *** first throw call Stack: No readable call stack is printed, the detailed call method name and other information will be

IOS learning materials sharing-Apple's official iPhone application advanced development course (16 sets)

You can see good IOS learning materials on 51cto, PDF, and favorites first. Apple iPhone application advanced development course (16 sets) Main Content [Advanced iPhone application development courses] 01. Ice

Use of Openurl (IOS calls system phones, browsers, maps, emails, etc)

Today, I met a line of code to open a webpage, which is much easier to implement than the uiwebview control in my impression. It is easy to use and can be easily used after real machine testing, I searched for some related information on the

View IOS sandbox (sanbox) files

Every IOS program has its own file system. This file system is called sanbox, which stores files other than this code, other applications cannot access the sandbox of the program, How can I view the sandbox locally? Under normal circumstances, some

Open-source Chinese IOS client learning-(4) gcdiscreetnotificationview prompt View

The gcdiscreetnotificationview class library is used to display the current status as a notification view without stopping users from interacting with device applications. Https:// of

Unlimited interconnection IOS video tutorials and courseware PPT source code-for beginners

I accidentally saw an infinitely interconnected iOS development video tutorial when I checked the information. It was a good resource and shared it with IOS developers; The resource comes from the lazy IOS code library Video

Three JSON methods for iOS parsing APIs of the National Meteorological Administration

Weather forecast interface provided by the National Meteorological Administration There are three interface

Open-source Chinese IOS client learning-(1) prefix. PCH File

When we create a new project, we will see a prefix in the supporting files file. the file ending with PCH. PCH is the "precompiled header", that is, the pre-compiled header file. Some codes that are not frequently modified in the project stored in

Open-source Chinese IOS client learning-(6) network connection Detection

The open-source Chinese IOS client synchronizes data over the network to achieve the same data effect as the web page, so you need to check the network when starting the program. This is also the first step to start every online application, if the

Open-source Chinese IOS client learning-(2) pull-down refresh special effect egotableviewpullrefresh

The first step to open an open-source Chinese IOS client application is to load data. when we open the application for the second time, our interface displays the last updated data, now we want to see the latest content, we need to refresh the data

Open-source Chinese IOS client learning-(9) Time tag of code snippets

In the open-source Chinese client, whether it is a comprehensive article, a question in the Q & A, or a moving talk, each article will be followed by a comment with time, for example, "10 minutes ago", "2 hours ago", "5 days ago", or "-2-9", these

[IOS] Use nsproxy to implement proxy Mode

// Myproxy. h # Import @ Interface myproxy:Nsproxy { Nsobject * object; } -(ID) transformtoobject :( nsobject *) anobject; @ End // Myproxy. m # Import"Myproxy. H" @ Implementation myproxy -(Void) dealloc { [ObjectRelease]; Object =

[IOS] xcode 4 supports both old iOS devices (armv6) and compatible with iPhone and iPad

By default, only armv7, or new iOS devices, including the iPhone3gs, iPhone 4, iPhone 4 s, iPad, and iPad 2, while iPhone, iPhone 3G, iPod Touch, and iPod Touch 2 belong to armv6 architecture. 1. The steps for compatibility with armv6 and armv7 are

[IOS] callback mselector: withobject: afterdelay: problems that do not work and Solutions

This problem has been found for nearly one day. Baidu and Google have been around for a long time, so no one has encountered the same problem? Both mselector: withobject: afterdelay: And [nst1_timerwithtimeinterval: Invocation: repeats:] have this

IOS development skills-reuse code snippets

If you are a developer, during the development process, you will find that some code is frequently used in the same project or in different projects, experienced people will directly encapsulate the code in a class, or write a macro definition or

Open-source Chinese IOS client learning-(12) User Login

In the previous blog's open-source Chinese IOS client study-(11) What is the process of saving the user name and password to the local sandbox and reading the user name and password from the local machine? -(void)saveUserNameAndPwd:(NSString

Open-source Chinese IOS client learning-(13) use the uiwebview control Layout View

Learning from the open-source Chinese IOS client in the previous blog-(12) User LoginLoginview. in the XIB layout, we can see a uiwebview control, but it does not load a webpage, but displays some text information, including some URL links, click

Open-source Chinese IOS client learning-(14th) Use egoimageloading to asynchronously load images

Egoimageloading is a third-party class library that uses a large number of asynchronous image loading methods to simplify the development process. We directly input the image URL. This class library will automatically help us load and cache images

Frequently Used Macros in iOS development

Using some commonly used macros during iOS development can improve development efficiency and code reusability; placing these macros in a header file and then putting them in the project-prefix. in the PCH file (or directly put it in-prefix. in PCH.

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