黑马程序员—OC学习笔记—多个参数方法，匿名类，自定义对象初始化方法

来源：互联网发布：什么是大数据分析编辑：程序博客网时间：2024/05/16 05:36

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本节内容，OC多个参数方法，匿名类，自定义对象初始化方法，代码如下：

#import <Foundation/Foundation.h>@interface Car : NSObject{    @public    int speed;    char* brand;}-(Car*)initWithSpeed:(int)speed CarBrand:(char*)brand;-(void)showCarInfo;-(int)compareSpeedWithOtherCar:(Car*) anotherCar;//两个参数-(int)getEqualSpeedWithFirstCar:(Car*)firstCar SecondCar:(Car*)secondCar;//3个参数，求平均速度@end@implementation Car-(Car*)initWithSpeed:(int)initSpeed CarBrand:(char*)initBrand //形参不能同名，否则就会覆盖{    (self->speed) = initSpeed;  //self可以省略    (self->brand) = initBrand;    return self;}//以下方式，测试成功//-(Car*)initWithSpeed:(int)s CarBrand:(char*)b//{//    speed = s;//    brand = b;//    return self;//}-(void)showCarInfo{    NSLog(@"This %s's speed is %dkm/h!",brand,speed);}-(int)compareSpeedWithOtherCar:(Car *)anotherCar{    [self showCarInfo];    [anotherCar showCarInfo];    int result = speed - anotherCar->speed;    NSLog(@"Speed compare result is %dkm/h!",result);    return result > 0 ? 1 :(result < 0 ? -1 : 0);}-(int)getEqualSpeedWithFirstCar:(Car*)firstCar SecondCar:(Car*)secondCar{    [self showCarInfo];    [firstCar showCarInfo];    [secondCar showCarInfo];    int equal = (speed + firstCar->speed + secondCar->speed)/3;    NSLog(@"These three cars'equal speed is %dkm/h!",equal);    return equal;}@endvoid testCar(){    Car* bmw = [Car new];    bmw->speed = 200;    bmw->brand ="BMW";    Car* benz = [Car new];    benz->speed = 220;    benz->brand ="BENZ";    Car* moto = [Car new];    moto->speed = 120;    moto->brand ="DaYangMOTO";    Car* sanlun = [Car new];    sanlun->speed = 60;    sanlun->brand ="FengHuangSanLun";    [bmw compareSpeedWithOtherCar: benz];    [bmw getEqualSpeedWithFirstCar: benz SecondCar: sanlun];    //这种方式傻傻的//    Car* taxis[] = {[Car new],[Car new],[Car new]};//    Car* hunda = taxis[0];//    hunda->speed = 200;//    hunda->brand ="HUNDA";//    [hunda showCarInfo];}void testAnonymityClass(){    [[Car new] showCarInfo];    [[[Car new] initWithSpeed:80 CarBrand:"Anony"] showCarInfo];    //匿名的结果，就是没有指针指向这个对象，只能进行一次性操作，就如路人甲碰面不再出现}void testInit(){    Car* tianlai = [Car new];    [tianlai initWithSpeed:150 CarBrand:"TianLai"];    [tianlai showCarInfo];    //一句话完成对象创建和初始化    Car* suv = [[Car new] initWithSpeed:250 CarBrand:"SUV"];    [suv showCarInfo];    [suv compareSpeedWithOtherCar: tianlai];}int main(){    testCar();    testAnonymityClass();    testInit();    return 0;}

程序运行结果如下：
这里写图片描述

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