实例：
NSString*dateStr =@"2014-11-10 13:00:13";
NSDateFormatter* dateFormat = [[NSDateFormatteralloc]init];//实例化一个NSDateFormatter对象
[dateFormatsetDateFormat:@"yyyy-MM-dd HH:mm:ss"];//设定时间格式,要注意跟下面的dateString匹配，否则日起将无效
NSDate*date =[dateFormatdateFromString:dateStr];
NSString*sinceNowStr = [TimecompareCurrentTime:date];
NSLog(@"sinceNowStr ====== %@",sinceNowStr);
方法：
+(NSString*) compareCurrentTime:(NSDate*) compareDate
//
{
NSTimeIntervaltimeInterval = [compareDatetimeIntervalSinceNow];
timeInterval = -timeInterval;
longtemp =0;
NSString*result;
if(timeInterval <60) {
result = [NSStringstringWithFormat:@"刚刚"];
}
elseif((temp = timeInterval/60) <60){
result = [NSStringstringWithFormat:@"%ld分钟前",temp];
}
elseif((temp = temp/60) <24){
result = [NSStringstringWithFormat:@"%ld小时前",temp];
}
elseif((temp = temp/24) <30){
result = [NSStringstringWithFormat:@"%ld天前",temp];
}
elseif((temp = temp/30) <12){
result = [NSStringstringWithFormat:@"%ld月前",temp];
}
else{
temp = temp/12;
result = [NSStringstringWithFormat:@"%ld年前",temp];
}
returnresult;
}
