处理2月30号，12:66分类似的时间。

NSCalendar * calendar = [NSCalendar
currentCalendar];

NSDateComponents * dateCom = [[NSDateComponents
alloc]init];

dateCom.year =
2015;
dateCom.month =
2;
dateCom.day =
31;

dateCom.hour =
12;
dateCom.minute =
66;
dateCom.second =
80;

NSDate * date = [calendar
dateFromComponents:dateCom];

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

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

NSLog(@"%@",[format
stringFromDate:date]);

//2015-03-03 13:07:20