OC Classes and objects

Main.m

OC01 Classes and objects

//

Created by Dllo on 15/7/15.

Copyright (c) 2015 CML. All rights reserved.

//

#import <Foundation/Foundation.h>

First header file

#import "Phone.h"

#import "Audio car.h"

#import "Student.h"

int main (int argc, const char * argv[]) {

Print

NSLog (@ "@ Liushan");

Plastic

Nsinteger i = 100;

NSLog (@ "%ld", I);

Floating point Type

CGFloat f = 3.14;

NSLog (@ "%g", f);

String

OC string side Chinese no problem

NSString *str = @ "Liushan";

NSLog (@ "%@", str);

The array in OC

Nsarray *arr = @[@ "1", @ "2"];

NSLog (@ "%@", arr);

For (Nsinteger i =0; i<2; i++) {

NSLog (@ "%@", Arr[i]);

//    }

Create an Object

Creating an object takes two steps

1. Need to open space for the object, open up the memory of space

Student *stu = [Student alloc];

2. After the object memory is opened up, the object needs to be initialized

Stu =[stu Init];

Take two steps to merge

Student *stu =[[student alloc] init];

Invoking behavior through objects

[Stu Sayhi];

Action member variable

object to access its own member variables

NSLog (@ "%@", stu->_stuage);

//

Stu->_stuage = 100;

NSLog (@ "%ld", Stu->_stuage);

//

Change name

Stu->_stuname = @ "Yang Lin";

NSLog (@ "%@", stu->_stuname);

stu->_stuname [email protected] "Liushan";

NSLog (@ "%@", stu->_stuname);

Create objects by car class, and modify the member variables of the object

Phone *phone = [[Phone alloc] init];

Audio_car *car = [[Audio_car alloc] init];

[Car Run];

Car->_carcolor [email protected] "red";

NSLog (@ "%@", Car->_carcolor);

Create objects from the phone class, and modify the member variables of the object

Phone *phone =[[phone alloc] init];

Phone->_color [email protected] "red";

NSLog (@ "@ color", phone->color);

//

Student *stu = [[Student alloc] init];

NSLog (@ "%@", stu->_stuname);

//

Phone *phone =[[phone alloc] init];

NSLog (@ "%g", Phone->_price);

//

Ways to use Sayhi

[Phone sayhi];

Phone->_type = @ "Hello";

[Phone sayhi];

//

30 Classes

Five member variables

A Sayhi method that can print all the information

2 random ways.

Complete the override of the Init method

return 0;

}

//

Student.h

OC01 Classes and objects

//

Created by Dllo on 15/7/15.

Copyright (c) 2015 CML. All rights reserved.

//

#import <Foundation/Foundation.h>

@interface interface file, start of a class

Student is the current class name

NSObject is the inherited parent class

class to @end only to end

@interface Student:nsobject

Characteristics

{

@public

The visibility of member variables

Member variables, instance variables

NSString *_stuname; Name

NSString *_stusex; Gender

Nsinteger _stuage; Age

CGFloat _stuscore; Results

NSString *_stuhobby; Hobby

}

Behavior

Say hello

-(void) sayhi;

Eat

-(void) eat;

Play

-(void) play;

@end

Student.m

OC01 Classes and objects

//

Created by Dllo on 15/7/15.

Copyright (c) 2015 CML. All rights reserved.

//

#import "Student.h"

The corresponding implementation file

@implementation Student

Say hello

-(void) sayhi{

NSLog (@ "Hello");

}

Eat

-(void) eat{

NSLog (@ "Eat bar");

}

Play

-(void) play{

NSLog (@ "want to play");

}

Rewrite the inherited Init method.

-(ID) init{

_stuname [email protected] "HO Bank";

_stusex [email protected] "female";

[Email protected] "male";

_stuage = 20;

_stuscore=100;

return self;

}

@end

/Audio Car.h

OC01 Classes and objects

//

Created by Dllo on 15/7/15.

Copyright (c) 2015 CML. All rights reserved.

//

#import <Foundation/Foundation.h>

@interface Audio_car:nsobject

{

@public

Nsinteger _carmoney;

CGFloat _carv;

NSString *_carcolor;

CGFloat _cardisplacement;

NSString *_carsize;

CGFloat _carweight;

}

-(void) run;

-(void) fuelcharge;

-(void) knock;

@end

Audio CAR.M

OC01 Classes and objects

//

Created by Dllo on 15/7/15.

Copyright (c) 2015 CML. All rights reserved.

//

#import "Audio car.h"

@implementation Audio_car

-(void) run{

NSLog (@ "Drive");

}

-(void) fuelcharge{

NSLog (@ "");

}

-(void) knock{

NSLog (@ "");

}

@end

Phone.h

OC01 Classes and objects

//

Created by Dllo on 15/7/15.

Copyright (c) 2015 CML. All rights reserved.

//

#import <Foundation/Foundation.h>

@interface Phone:nsobject

{

@public

NSString *_phonename;

NSString *_phonecolor;

Nsinteger Phoneprice;

}

-(void) Tpboy;

-(void)

Write a function to print all the information

-(void) sayhi;

Phone.m

OC01 Classes and objects

//

Created by Dllo on 15/7/15.

Copyright (c) 2015 CML. All rights reserved.

//

#import "Phone.h"

@implementation Phone

How to override a phone's initialization

-(ID) init

{

_color = @ "White";

_price = 1999;

_type= @ "big screen";

_brand = @ "Huawei";

_screen = @ "4.7 inch";

return self;

}

-(void) Sayhi

{

NSLog (@ "%@,%@,%@,%@,%g", _brand, _type, _color, _screen, _price);

}

@end

OC Classes and objects