Objective-C

Note: What I'm talking about is the difference between objective-C and Java. In the same place, I just want Java developers to quickly master and understand objective-C.   Objective-C is different from Java: 1. Pay attention to the memory

Http://chchwy.blogspot.com/2010/05/linux-objective-c.html How to compile objective-C Programs on Linux 1. Sort the following packages in sequence: Sudo apt-get-y install build-essentialSudo apt-get-y install gnustepSudo apt-Get install gobjcSudo

The classification mechanism allows you to add new method declarations to a class file. It does not need to use the subclass mechanism and defines these methods under the same name in the class implementation file. # Import "classname. h" @

Background Singletons classes are an important concept to understand because they exhibit an extremtely useful design pattern. This idea is used throughout the iPhone SDK, for example, uiapplication has a method called sharedapplication which when

If you define a retain property in an objective-C class, only obj. the attribute takes effect only when accessed in the form of VaR, that is, the getter/setter method of the member variable is used. Otherwise, the attribute cannot take effect. For

Recently, I plan to develop some applications for the iPhone, iPod Touch, and iPad, so I need to start learning objective C (a language similar to C developed by Apple ). Due to Apple's self-Closed Industrial Chain Development Model (from chips,

The series from C ++ to objective-C is over. I would like to reiterate that this series is not a complete objective-C Teaching document, but it is convenient for developers who are familiar with C ++ or C ++ (for example, a large number of Java

1. @ public, @ protected, @ private I personally think that there is no clear difference between @ public and @ protected. If the objects within their scope are not set to @ property, the object is equivalent to the protected object, only the

Document directory Range Geometric Data Type Range Typedef struct _ nsange { Unsigned intlocation; Unsigned intlength; }Nsange; This struct is used to indicate the range of related items, usually the character range in the string or the range of

Some time ago, I took some time to touch objective-C and installed the "Black Apple" and Lion system. The version is 10.7.2. I also need to install the xcode development environment. The corresponding version is xocde_4.2_and_ios_5_sdk_for_lion.dmg.

1 Preface The objective-C category provides a way to dynamically add new features to existing classes, instead of adding new features, categories can also be used as private functions of classes in Beijing. The header file and the implemented file

Uiwebview is one of the most commonly used sdks for iOS. It has a stringbyevaluatingjavascriptfromstring method that can embed Javascript into the page. Through this method, we can interact with webpage elements in uiwebview in IOS. Uiwebview is one

Objective-C for Java programmer Part 1 Object and basic type Java contains the original, or a small part.InternalType. Are these values the objects one of the largest semantic differences between Java and smalltalk. In smalltalk, the original type

The first thing to note is: Although GNUStep can be installed and used on windows, it is mainly intended for Linux users rather than Windows users. If you have good Linux development experience, it is good to use GNUStep. GNUStep is not powerful and

Custom class. On Object-c, a class is composed of a public header file. h and A private implementation file. m. the header file defines the class interface, starting with @ interface and ending with @ end as follows: # import @ Interface Member:

  Use: @ property (nonatomic, copy) I made a mistake on this issue today. I have been searching for a long time to find out the cause. In addition, after a simple disassembly, the Block is stored in the static variable area, and a runtime stack is

NSSet and NSMutableSet are unordered, But they guarantee data uniqueness. When the same data is inserted, it will not have any effect. The internal implementation is a hash table, so you can search for a data within a constant time. 1. Use of NSSet[

The core class for processing strings in Objective-C is NSString and NSMutableString. These two classes process most of the functions of strings in Objective-C. The main difference between the two classes is that NSString cannot dynamically modify

Document directory Search Initialization Add a Library: Header file path Other third-party libraries. Introduction: Third-party libraries are indispensable during application development, which can improve the development efficiency. Some

Introduction: In the previous article, we talked about KVC. In this article, we learned KVO. The full name is: Key Value Observing. the literal translation is: Key Value-based observer. So what is its use? KVO is mainly used for view interaction.