Objective-C

In objective-C, after a class is correctly compiled, a variable exists in the compiled class to save information about the class. We can get this class through a common character string or through the generated object. After the class is

I. Inheritance of Classes In objective-C, class inheritance is similar to that in C ++. The difference is that objective-C does not support multiple inheritance. A class can only have one parent class, single inheritance makes the inheritance

Objective-c Protocol delegate implements Protocol-the Protocol. After using this protocol, you must follow this Protocol. The methods required by the Protocol must be implemented. Delegate delegate-delegation, as its name implies, is to entrust

Learn objective-C Original address http://cocoadevcentral.com/d/learn_objectivec/   Translator's preface I saw this article on the Internet and thought it was very good, but it seems that no one has translated it into Chinese, so I am bold enough to

1. The inherited syntax is as follows: @ Interface testcoop: nsobject {Int Imonth;Int iyear;Int iday;} -(Void) setyear: (INT) iyear;-(Void) primalsetdata: (INT) iyear :( INT) Imonth :( INT) iday;-(Void) setdata: (INT) year Imonth :( INT) Imonth iday

There are many introductory books on Object-C, which will not be listed here. But these books all have a small problem, that is, translation statements, which are sometimes confusing. A few days ago, I saw a post during a visit to cocoachina,

Three Characteristics of object-oriented encapsulation, inheritance, and Polymorphism Encapsulation: Hiding internal implementations and stabilizing external interfaces. Encapsulation is to define the class definition property definition

Int ivisen = 1000;-(void) viewdidload {[Super viewdidload]; // do any additional setup after loading the view, typically from a nib. // int code block int Mutl = 7; int (^ visenblock) (INT) = ^ (INT num) {return num * Mutl ;}; nslog (@ "% d ",

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After reviewing the basic syntax of Objective-c, each review will have a new mind. The following are the summary points: 1. If the allocated memory is not effectively recycled, memory leakage may occur. 2. Determine whether the memory of a variable

Directly add the code without explanation. 1 #import 2 3 @interface Demo01 : NSObject4 5 6 -(void) run;7 -(void) start;8 9 @end 1 # import "demo01.h" 2 3 @ implementation demo01 4 5-(void) run 6 {7 static int counter = 0; 8 9 While (! [[Nsthread

  Basic data types (NSInteger, CGFloat) and C data types (int, float, double, char, etc) // Int, or NSIntegerThat is to say, when int type variables are needed, they can be the same as the program that writes C,Use int or NSIntegerBut we recommend

Compile and process commands  Since Objective-C is an object-oriented programming language, it should support reusable data and function encapsulation bodies, that is, classes. A class is a product developed on the basis of a struct. A struct can

Objective-c:       2.1.1-2.1.3 description 1. judging whether the memory of a variable is allocated to the stack gipo is a key method on the stack is to see if it is a pointer. A pointer is a variable pointing to a memory address.     2.1.4 use

2.2 2.2.1 Functions 2.2.2 define functions 2.2.3 implementation and interface: 1. Create an interface file for the Unit 2. Create an implementation file 3. You need to modify the file that calls the function to include the interface file of

I am a java developer with some experience. Four years of java and three years of Android, I believe I don't need to talk much about why I want to learn IPhone. Because you know. Learning IPhone is certainly a piece of cake for me. First, the

Document directory 4.1. NSNumber type 4.2. NSArray type At this year's WWDC 2012 Apple's global Developer Conference, Apple made significant improvements to LLVM compilers, And the LLVM compiler in the new version of Xcode 4.4 was upgraded to 4

The Singleton mode is often used in iOS development. Apple has provided the following official methods to use objective c singleton: static MyGizmoClass *sharedGizmoManager = nil; + (MyGizmoClass*)sharedManager{ @synchronized(self) { if

Delegate)Is an object. The object of another class requires the delegate object to perform some of its operations.Creating an "NSObject" category is called creatingInformal agreement.Any class object that implements the method in the "NSObject"

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.