ios-计算时间方法

-(NSString *)countPublishTime:(NSString *)sDate

{

NSDate *dtNow = [NSDate date];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];

[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

NSDate *date = [dateFormatter dateFromString:sDate];

if (date == nil) {

return @"";

}

NSCalendar *gregorian = [[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];

unsigned int unitFlags = NSDayCalendarUnit;

NSDateComponents *comps = [gregorian components:unitFlags fromDate:date toDate:dtNow options:0];

NSInteger days = [comps day];

NSInteger hours;// = [comps hour];

NSString *sTime = nil;

NSInteger minute;// = [comps minute];

if (days==0) {

unitFlags = NSHourCalendarUnit;

comps = [gregorian components:unitFlags fromDate:date toDate:dtNow options:0];

hours = [comps hour];

if (hours == 0) {

unitFlags = NSMinuteCalendarUnit;

comps = [gregorian components:unitFlags fromDate:date toDate:dtNow options:0];

minute = [comps minute];

if (minute == 0||minute<0) {

sTime = @"刚刚";

}

else sTime = [NSString stringWithFormat:@"%d分钟前",minute];

}

else sTime = [NSString stringWithFormat:@"%d小时前",hours];

}

else sTime = [NSString stringWithFormat:@"%d天前",days];

return sTime;

}

调用

NSString *sTime =[self countPublishTime:obj.strPara08];