Objective-C 基础类：Time3 时间（类方法）

.h文件

#import <Foundation/Foundation.h>

@interface Time3 : NSObject//类方法实现

{

   int hour;

   int minute;

   int second;

}

-(void)setHour:(int)_h;

-(int)hour;

-(void)setMinute:(int)_m;

-(int)minute;

-(void)setSecond:(int)_s;

-(int)second;

+(Time3 *)creat;

@end

.m文件

#import "Time3.h"

@implementation Time3

-(void)setHour:(int)_h

{

   hour = _h;

}

-(int)hour

{

   return hour;

}

-(void)setMinute:(int)_m

{

   minute = _m;

}

-(int)minute

{

   return minute;

}

-(void)setSecond:(int)_s

{

   second = _s;

}

-(int)second

{

   return second;

}

+(Time3 *)creat;

{

   Time3 *time = [[Time3alloc]init];

   return time;

}

主函数

#import <Foundation/Foundation.h>

#import "Time3.h"

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

{

    @autoreleasepool {

        

        // insert code here...

        

       Time3 *time = [Time3creat];//类方法

        [timesetHour:10];

        [timesetMinute:20];

        [timesetSecond:30];

        

       NSLog(@"%d:%d:%d",[timehour],[time minute],[timesecond]);

        

        

    }

   return 0;

}