Objective-C

1. First prepare the document containing all the provinces and cities, and drag the document into the Xcode we built. 2. Then create a new path nsstring *path = @ ""; Then drag the provincial urban documents to the @ ""; 3. Before sorting, we

constructor function:Objective-c is an object-oriented language, and when we define a class in objective-c, we always provide an initialization method, which is commonly written by everyone:- (ID) init {//Call the parent class method, an instance of

Memory Management principles: As long as someone else is using this object, the object will not be recycled; As long as you want to use this object, then you should let the object reference counter +1; When you do not want to use

First, what is InstancetypeInstancetype is clang 3.5, a keyword provided by clang that represents an unknown type of objective-c object returned by a method. We all know that an object of an unknown type can be represented by an ID keyword, so why

　　Remember that when you first learned OC, it was always unclear to instance variables and attributes.For example, when printing the name of the person class object in the code below, when to use name with "_",NSLog (@ "%@",p1->_name); When to

Auto Free Pool is a semi-automatic memory management methodAutorealease Method:-(Instancetype) autoreleaseThis method places the object in the auto-free pool, and all objects in the pool are destroyed when the pool is automatically freed.Common

1. Property Basic use----the compiler will automatically generate a declaration of a property's Getter/setter method whenever it sees @property 2. @synthesize @synthesize is a compiler directive that simplifies the

There is a certain C + + or Java Foundation, over the OC syntax can be, are interlinked, personally think the difficulty is OC memory management, although there is ARC, but also need to learn, because the old software maintenance.Based on the C

Classes and Objects#import是include的升级版, you can automatically prevent duplicate inclusion, so note: Everyone will use import when the header file is introducedFoundation is a framework, Foundation.h is the main header file of the foundation

------java training, Android training, iOS training,. NET training , look forward to communicating with you! -------Class method.1. Features:Start with a plus sign (+),Call Format: [class name Method name]The benefits of class methods: No need to

Initialization convenience initialization and specifying initialization convenience initialization mode convenient initialization mode one-(id) initWithFormat:(NSString *) format,...; Initializes a new string as the result of the

In the program design, the use of functions undoubtedly greatly simplifies the writing of code, improve the efficiency of code operation, reduce duplication of code. So let's take a look at the method in detail. This example also takes the people

This post implements the simplest subtraction operation using OC, which includes concepts such as variable definition, operation method, and formatted output. The main learning basic grammar, in fact, and the C language syntax is still more

I. Concepts of classes and objectsTwo of the key concepts in OC are classes and objects, and the relationship between classes and objects is like the relationship between a mold and an item made with this mold. A class gives a uniform definition of

Objective-c language uses "message structure" rather than "function call"The message structure is represented as follows:// messageing (objective-c) New ]; [obj Performwith:parameter and:parameter2];The function call is represented as follows://

A brief introduction to the current GitHub Top 100 project makes it easy for beginners to quickly learn about the current objective-c on GitHub.If you have any questions, you can contact me via Weibo @ Li Jin Project Name Project

This post consists of: http://www.sollyu.com/objective-c-synchronization-requests-requests-for-asynchronous-requests-get-and-post-requests/Description1 The synchronization request can request data from the Internet, once the synchronization request

The syntax for declaring property is:@ Property (attribute [, attribute 2,...])Type name; There are three types of attributes: 1. read/write attributes (writability) include: readwrite/readonly 2. setter semantics (setter semantics) includes:

For iPhone development, we use instruments when detecting all of them during execution, but sometimes we can eliminate these in the cradle. Static analysise. You can run build and analyze directly for the build check. You can also check that the

Objective-the C language is designed as an exquisite, object-oriented, and easy-to-use computer language. It is fully based on the Standard C language and has made the smallest but powerful extension language. This extended language draws on the