Objective-C

StatementConditional statement The conditional statement body should always be surrounded by curly braces. Only one line of code is best added, otherwise it will bring security risks. Copy Code code as follows: Recommended if

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

              objective-c Attribute Properties (assign, retain, copy, ReadOnly, ReadWrite, Atomic, nonatomic)   The following article is reproduced from: http://blog.csdn.net/zhangao0086/article/details/6674460, this article is very thorough,

OC Memory ManagementFirst, the basic principle(a) Why memory management is needed.Because the memory of the mobile device is extremely limited, so the memory of each app is also limited, when the app consumes more memory, the system will issue a

Objective-C in different ways to achieve the lock (a) Why need to use locks, of course, familiar with multi-threaded you, naturally will not feel strange to it. Did you use the lock mechanism well in the code? Do you know several ways to implement

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

Initializers refer to constructors in other object-oriented languages, such as Java.Objective-c also has an object constructor in the Init form of the method. However, there are no special behaviors in OBJC in these methods.By convention, program

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

The stack, as a data structure, is a special linear table that can only be inserted and deleted at one end. It stores the data according to the advanced principle, the first data is pressed into the bottom of the stack, the final data is at the top

Where the property can be declaredProperty can be declared in the Class Interface section and class extension and protocolThe visibility of the propertyThe property in Objective-c is actually the getter and setter method. The property of a class can

1. Overview In Internet-based applications, the sender encrypts and transmits the characters in a certain way, while the receiver decrypts the characters based on the agreed key. In this way, even if the characters transmitted are intercepted, it

When using functions such as nslog and [nsstring stringwithformat:], they all work based on C/C ++-style string formatting. Originally, C/C ++ has never been used. In iPhone development and development, the NS series objects are added, and the

Outline: Introduction Notes compared with the C Language Objective-C advanced features Development Tool introduction (cocoa toolkit features, framework, source file organization; xcode usage Introduction) Introduction: 1. Objective-C is

First declare this articleArticleThe source is from the garden, not my original! Address: http://kb.cnblogs.com/page/91507/ Objective-C is a simple computer language designed to support real object-oriented programming. Objective-C extends the

In oC, only pointer variables can be used to indirectly manipulate objects.The key word used for class declaration is @ interface. @ InterfaceClass Name @ end @ End at the end indicates that the class declaration ends. The key word used for class

1. Create a project named slider: Open xcode: Select create a new xcode project: Select single view application: Fill in the product name Project name, company identifier company ID, class prefix, The key is: select the iPhone for the

The purpose of the copy design: the original object will not be affected when the copy is changed.1. a copy of an object can be created using the copy or mutablecopy method.2. Copy needs to implement the nscopying protocol first, and the created

When I first came into contact with Java, I thought the entire reflection package was very novel. It brought Java closer to the interpreted scripting language, at the same time, it also opened a distance from the mainstream C and C ++. It is

We know that the message sending program to nil in Objective-C will not crash, Objective-C is based on the C language, On PC, null pointer operations are performed in C language, The program crashes due to a protection error due to out-of-bounds

Today, I saw an article in the garden titled "Objective-C 2.0 with Cocoa Foundation --- 5, Class type, Selector and function pointer, you can't help but add comments to the code so that you can view it later. My personal experience: the "Class type