Objective-c (2)

Objective-c

Class, Object, method

The actual variable is an instance of the class.

The actions that an instance can perform are called methods.

[Classorinstance Method];

Defining classes

@interface Classname:superclass

Define method as interface

@end

Class implementation

@implementation Class {

Variable

}

Methods

@end

Myfraction = [[Fraction alloc] init];

Ex

#import <Foundation/Foundation.h>

//#import "Fraction1.h"

---------*.h

@interface Fraction: nsobject

-(void) print;

-(void) Setnumerator: (int) n;

-(void) Setdenominator: (int) D;

@end

---------*.M

@implementation Fraction {

int numerator;

int denominator;

}

-(void) Print {

NSLog(@ "%i/%i", numerator, denominator);

}

-(void) Setnumerator: (int) n {

numerator = n;

}

-(void) Setdenominator: (int) d {

Denominator = D;

}

@end

int Main (int argc, const Char * argv[]) {

@autoreleasepool {

fraction *myfraction;

Myfraction = [fraction alloc];

Myfraction = [myfraction init];

[Myfraction setnumerator: 1];

[Myfraction setdenominator: 3];

[Myfraction print];

}

return 0;

}

@property @interface

@sysnthesize @implementation

self = this;

@class

Inheritance and overrides

Abstract

Polymorphic

is* to judge

@try {

}

@catch) NSException * ex) {

}

@finally

@throw

@protected

@private

@public

@package

Enum enum

typedef

The tenth chapter is finished.

Objective-c (2)