Objective-C

Why is Stella SDK used? Now cross-platform development tools more and more, such as the use of HTML5 phone gap, such as a name of the king proposed Cocos2d-x, there are many, these platforms can directly develop iOS and Android applications, but

In objective-C, attributes are usually set with the following keywords: -- Assign: Specifies the setter method to use a simple value assignment, which is the default operation. You can use this attribute for scalar type (such as INT. You can

Reproduced in: http://www.cnblogs.com/54007/archive/2011/02/11/1951355.html In C #, we use interfaces to implement polymorphism. For example, the interface iob defines a method F. There are two classes A and B that implement the IOB interface. Iob

Nowadays, iPhone development is getting increasingly popular, and I am also eager to learn about objective-C. However, the company is a clear Windows XP system (not a sound picture of the company's machine) (^_^) and cannot learn and debug it. One

 1. Objective-C Polymorphism 1. Concept: Different implementations of the same interface Different classes can define methods that share the same name. The dynamic type allows the program to determine the object type until execution. Dynamic Type

Document directory Create a string Class Method Get size Comparison Policy Case-insensitive comparison How to determine whether a string contains other strings Nsstring is a class used in cocoa to process strings. Below are some common

Document directory Nsnumber Nsvalue Nsnull Various numeric values Both nsarray and nsdictionary can only store objects and cannot store any basic types of data, such as int, float, and struct. Therefore, we can use objects to encapsulate basic

1 Preface For us, the singleton mode is nothing more common, that is, a program has only one class instance. Today we will introduce the singleton code in objective-C.2. code example Mymanager. m # Import "mymanager. H "static mymanager *

Objective-C syntax quick reference by cocoa China 10 Apr Most beginners who have a basic development experience on other platforms are eager to see xcode. After seeing the interface builder, they are eager to get started with the objective-C syntax,

The category is a class, which is an existing class with new features added.Category is used to add a new method to an existing class. You can use the object of the existing class to call the added method without inheriting the existing class.The

Objective-C Programming Reading Notes Chapter 2 numbers, strings, and sets String Common Operations Nsstring * str1 = @ "this is string "; Nsstring * str2 = [str1 substringwithrange: nsmakerange (8, 6)]; Nsange subrange = [str1 rangeofstring: str2]

The KVO key-value observer mode is an important mechanism of cocoa similar to the notification mode. When the attributes of the observer change, the observer performs corresponding operations. Create a new person class to inherit nsobject, add the

Set a set of first-level single-value objects, which can be variable or unchanged. Operations include: searching, adding, and deleting members in a set (common to variable sets), comparing two sets, and calculating the intersection and union of the

1. First install the Objective-C Compiler GNUstep Windows Installer provides a simulated development environment for Objective-C on the Windows platform. There are four software packages, including GNUstep System and GNUstep Core, GNUstep Devel and

1. Definition class: In. H files, @ Interface Class Name: parent class name { Member variables; } Member functions; @ End;   In the. m file, @ Implementation Class Name Member function definition; @ End;   2. member function definition:-(Return

  An example of learning the Foundation has used all the things mentioned above, which is not bad. Code:   // The AddressCard interface declares the header file AddressCard. h # Import # import @ interface AddressCard: NSObject { NSString *

Address: http://www.cocoachina.com/macdev/objc/2012/0613/4355.html When to use self. most of the replies in the online search or forum are simply said that this is related to the objc access method, few people have answered the question about the

This section describes Objective-C classes and class objects. The method is simple to use. 1. Classes and Methods Class declaration syntax, declares a class called MyClass, which inherits from the root class: NSObject. (The root class can be

No matter how perfect a class design is, there will inevitably be unpredictable demands. How can we expand the existing class? Of course, inheritance is a good choice. However, Objective-C provides a special way to extend the class, called Catagory.

// Creating a Singleton InstanceStatic MyGizmoClass * sharedGizmoManager = nil; + (MyGizmoClass *) sharedManager {if (sharedGizmoManager = nil) {sharedGizmoManager = [[super allocWithZone: NULL] init];} return callback ;} + (id) allocWithZone :(