Objective-C

Objective-c Simple encapsulation String storage operation, eliminates the middle sandbox processing way Copy Code code as follows: /Storage PublicKey and SessionID-writecontent:nil-only fetch data, others-modify the original content and

Nsoperation First, Nsoperation1. IntroductionThe Nsoperation instance encapsulates the required operations and the data needed to perform the operation, and can perform this operation concurrently or in a non concurrency manner.The nsoperation

Brief introductionThe bubble algorithm is a basic sort algorithm that repeats the comparison of the two adjacent elements in the array. If one element is larger (smaller) than the other, then the position of the two elements is exchanged. Repeat

Look at the topic and know what this article is written about. BackBtn.frame.size = cgmakesize (+); This is the wrong way to do it. In OC, a member of the struct property of an object is not allowed to be modified, the above statement, BACKBTN is

In essence, the communication interaction between OC and JS is to send the message, that is, the function call, iOS7 after the official release of the JavaScriptCore framework is very convenient for us to call each other. In the past, we could only

Blocks Block Code SnippetBlock encapsulates a piece of code that can be executed at any time. It is an extension of the function in C, which is actually implemented in C, so it is valid in all languages based on C, including Objective-c, C + +, and

Agreement: A protocol is not a class: it can only declare a method and cannot have any instance variables, it has two types: formal and informal, and the Protocol only declares files, no implementation files. Formal agreements are a

If the class follows the Nscoding protocol, the two instance methods of encoding and decoding the Protocol must be implemented in the class. This feature provides the underlying archive and file functionality.Small exercise:1. Define a Computer

1, the class name of each class must be unique in the software (including in the framework, bounds), the class name has more than one word is the Hump method. Prefix Framework NS Foundation (OS X and IOS) and

Description: This objective-c topic is a prelude to learning iOS development, and to enable programmers with experience in object-oriented language development to quickly get started with objective-c. If you do not have programming experience, or

How does I Declare A Block in objective-c? As alocal variable:returnType (^blockName)(parameterTypes) = ^returnType(parameters) {...};As a Property:@property (nonatomic, copy, nullability) returnType (^blockName)(parameterTypes);As amethod Parameter:

Attribute list 1, overviewIn cocoa, there is a class of objects called attribute lists (often abbreviated as plist), and cocoa knows how to save them to and from a file. Includes the following classes Nsarray,nsdictionary,nsstring,nsnumber,nsdata

Category Introduction　　In everyday development, you may encounter the need to add methods to a class. For example, you need to add a printing method to the NSString class. Of course, we can create a new class such as TestString and inherit the

. h header file, which declares some public properties, methods. Header files generally do not put too much stuff, there is no need to expose too many interfaces, private and encapsulation.. m master file, used to implement methods in. h files, and

1. Add minus sign before methodThere is no concept of public and private in objective-c, that is to say that all are public. A minus sign represents the beginning of a function, method, and message. The plus sign means that you don't need to create

 block of Objective-cTags: iosobjective-cos xblock2016-04-13 14:05 226 people read Comments (0) favorite reports Classification:Small white iOS notes (3)Copyright NOTICE: This article for Bo Master original article, without Bo Master permission

First of all, the role of their two, nil is to put an object's pointer to empty, just cut off the pointer and in-memory objects, it does not have any effect on the release of memory, and release is really used for memory release, after release, the

First, the knowledge point:1. Nested use of dual models2, the button of the Alignment method3, optimize the load of UITableView4, the use of Layoutsubview5, the cell's folding agentTwo, nested definitions of two models:Note that the self.friends is

Objective-C RuntimeDescribes the MACOs objective-C Runtime Library support functions and data structures. overview (overview) the definition of runtime in the official document the objective-C Runtime is a Runtime Library that provides support for

Source annotations Mainly supports several checks Specific topicsAnnotations to enhance generic checksNull Pointer checkingAttribute 'nonnull'Mac OS X API annotationsCocoa & core Foundation memory management annotationsAttribute 'ns _