有时候开发中我们只需要年月日、或者只需要时分秒，刚开始由于对NSDate不是很熟悉，走了很多弯路，特在此记录！！回头要好好把NSDate的文档好好看看
NSDate *date = _datePickerView.date; NSDateFormatter *formatter = [[NSDateFormatter alloc]init]; // Get Current Hour [formatter setTimeStyle:NSDateFormatterShortStyle]; NSLog(@"test------ %@",[formatter stringFromDate:date]); <pre name="code" class="objc">//这样设置得到的格式是这样的： test------ 下午2:19
[formatter setDateStyle:NSDateFormatterShortStyle];
NSLog(@"test+_+++++++ %@",[formatter stringFromDate:date]);
如果我们想获取年、或者月、或者日、或者小时、或者分钟等单个值时该如何做呢？看代码如下：
NSDate *date = [NSDate date];
// Get Current Year
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
[formatter setDateFormat:@"yyyy"];
NSString *currentyearString = [NSString stringWithFormat:@"%@",
[formatter stringFromDate:date]];
// Get Current Month
[formatter setDateFormat:@"MM"];
currentMonthString = [NSString stringWithFormat:@"%d",[[formatter stringFromDate:date]integerValue]];
// Get Current Date
[formatter setDateFormat:@"dd"];
NSString *currentDateString = [NSString stringWithFormat:@"%@",[formatter stringFromDate:date]];
// Get Current Hour
[formatter setDateFormat:@"hh"];
NSString *currentHourString = [NSString stringWithFormat:@"%@",[formatter stringFromDate:date]];
// Get Current Minutes
[formatter setDateFormat:@"mm"];
NSString *currentMinutesString = [NSString stringWithFormat:@"%@",[formatter stringFromDate:date]];
// Get Current AM PM
[formatter setDateFormat:@"a"];
NSString *currentTimeAMPMString = [NSString stringWithFormat:@"%@",[formatter stringFromDate:date]];
开发中关于日期的处理：NSDate中取出日期、取出时间等,布布扣,bubuko.com
原文地址：http://blog.csdn.net/feixiang_song/article/details/38517133
