时间戳与实践的转化(CIOTimer)

#import <Foundation/Foundation.h>
@interface CIOTimer : NSObject
+(NSString *)compareCurrentTime:(NSDate*) compareDate;
@end

#import "CIOTimer.h"
@interface CIOTimer ()
{
}
@end
@implementation CIOTimer
/**
 * 计算指定时间与当前的时间差
 * @param compareDate   某一指定时间
 * @return 多少(秒or分or天or月or年)+前 (比如，3天前、10分钟前)
 */
+(NSString *)compareCurrentTime:(NSDate*) compareDate
{
NSTimeInterval  timeInterval = [compareDate timeIntervalSinceNow];
timeInterval = -timeInterval;
NSInteger time = round(timeInterval);
long temp = 0;
if (time < 60) {
NSString *result = @"刚刚";
return result;
}
else if((temp = timeInterval/60) <60){
   NSString *result = [NSString stringWithFormat:@"%ld分前",temp];
  return result;
}
else if((temp = temp/60) <24){
    NSString *result = [NSString stringWithFormat:@"%ld小前",temp];
    return result;
}
else if((temp = temp/24) <30){
    NSString *result = [NSString stringWithFormat:@"%ld天前",temp];
    return result;
}
else if((temp = temp/30) <12){
    NSString *result = [NSString stringWithFormat:@"%ld月前",temp];
    return result;
}
else{
    temp = temp/12;
    NSString *result = [NSString stringWithFormat:@"%ld年前",temp];
    return result;
}
    return  nil;
}
@end