类与类之间的简单传值

来源：互联网发布：linux内核安装教程编辑：程序博客网时间：2024/06/09 23:20

Main.m

#import <Foundation/Foundation.h>#import "Car.h"#import "Engine.h"#import "Lamp.h"/* 设计如下几个类，Car自定义初始化方法，初始化方法传入引擎对象和车灯对象。    当车启动的时候，会调用引擎转动，车灯亮灯，当车停止的时候调用引擎停止转动，车灯熄灭。 */int main(int argc, const char * argv[]){    //创建引擎对象    Engine *engine = [[Engine alloc] initWithModel:@"1234567" withCapacity:3.14];    //创建车灯对象    Lamp *lamp = [[Lamp alloc] initWithWattage:60.0];        //创建car对象    Car *car = [[Car alloc] initWithEngine:engine withLamp:lamp];    [car setName:@"兰博基尼" withLicence:@"8888888"];        int s;    while (1) {        NSLog(@"请输入指令（1:启动   2:停止）：");        scanf("%d",&s);                if (s == 1) {            [car run];        }else if (s == 2) {            [car stop];        }else {            NSLog(@"输入非法");        }    }        return 0;}

Car.h

#import <Foundation/Foundation.h>#import "Engine.h"#import "Lamp.h"@interface Car : NSObject {    NSString *_name;    //车名    NSString *_licence; //车牌号        Engine *_engine;    //引擎    Lamp *_lamp;    //车灯    }//自定义初始化方法- (id)initWithEngine:(Engine *)engine withLamp:(Lamp *)lamp;- (void)setName:(NSString *)name withLicence:(NSString *)licence;//车启动- (void)run;//车停止- (void)stop;

Car.m

#import "Car.h"@implementation Car//自定义初始化方法- (id)initWithEngine:(Engine *)engine withLamp:(Lamp *)lamp {    self = [super init];        if (self != nil) {        _engine = engine;        _lamp = lamp;    }    return self;}- (void)setName:(NSString *)name withLicence:(NSString *)licence {    _name = name;    _licence = licence;    }//车启动- (void)run {    NSLog(@"车牌号为：%@的%@车启动了",_licence,_name);        [_engine turn];    [_lamp light];    }//车停止- (void)stop {    NSLog(@"车牌号为：%@的%@车停止了",_licence,_name);        [_engine stopTurn];    [_lamp dark];}

Engine.h

#import <Foundation/Foundation.h>@interface Engine : NSObject{        NSString *_model;   //型号    float _capacity;    //排量    }//自定义初始化方法- (id)initWithModel:(NSString *)model withCapacity:(float)capacity;//转动- (void)turn;//停止转动- (void)stopTurn;

Engine.m

//自定义初始化方法- (id)initWithModel:(NSString *)model withCapacity:(float)capacity {    self = [super init];        if (self != nil) {        _model = model;        _capacity = capacity;    }        return self;}//转动- (void)turn {    NSLog(@"型号为：%@ 排量为：%.2f的引擎转动了",_model,_capacity);    }//停止转动- (void)stopTurn {    NSLog(@"型号为：%@ 排量为：%.2f的引擎停止转动了",_model,_capacity);    }

Lamp.h

@interface Lamp : NSObject {    float _wattage; //瓦特    }//自定义初始化的方法- (id)initWithWattage:(float)wattage;//灯亮- (void)light;//熄灯- (void)dark;

Lamp.m

//自定义初始化的方法- (id)initWithWattage:(float)wattage {    self = [super init];        if (self != nil) {        _wattage = wattage;    }        return self;}//灯亮- (void)light {    NSLog(@"瓦特数：%.2f的灯亮了",_wattage);    }//熄灯- (void)dark {    NSLog(@"瓦特数：%.2f的灯灭了",_wattage);    }

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