NSDate获取系统时间和NSCalendar获取系统日期的方法

  

    //获得系统时间

    NSDate *  senddate=[NSDate date];

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

    [dateformatter setDateFormat:@"HH:mm"];

    NSString * locationString=[dateformatter stringFromDate:senddate];

    [dateformatter setDateFormat:@"YYYY-MM-dd-HH-mm-ss"];

    NSString *  morelocationString=[dateformatter stringFromDate:senddate];

    

    //获得系统日期

    NSCalendar  * cal=[NSCalendar  currentCalendar];

    NSUInteger  unitFlags=NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit;

    NSDateComponents * conponent= [cal components:unitFlags fromDate:senddate];

    NSInteger year=[conponent year];

    NSInteger month=[conponent month];

    NSInteger day=[conponent day];

    NSString *  nsDateString= [NSString  stringWithFormat:@"%4ld年%2ld月%2ld日",(long)year,(long)month,(long)day];