NSDate和NSString的转换
转载自：
http://www.cnblogs.com/zcw-ios/articles/2585070.html
用于uidate，picker。。
+(NSDate*) convertDateFromString:(NSString*)uiDate
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init] ;
[formatter setDateFormat:@"yyyy年MM月dd日"];
NSDate *date=[formatter dateFromString:uiDate];
return date;
}
输入的日期字符串形如：@"1992-05-21 13:08:08"
- (NSDate *)dateFromString:(NSString *)dateString{
NSDateFormatter *dateFormatter = [[NSDateFormatteralloc] init];
[dateFormatter setDateFormat: @"yyyy-MM-dd HH:mm:ss"];
NSDate *destDate= [dateFormatter dateFromString:dateString];
[dateFormatter release];
return destDate;
}
- (NSString *)stringFromDate:(NSDate *)date{
NSDateFormatter *dateFormatter = [[NSDateFormatteralloc] init];
//zzz表示时区，zzz可以删除，这样返回的日期字符将不包含时区信息。
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss zzz"];
NSString *destDateString = [dateFormatter stringFromDate:date];
[dateFormatter release];
return destDateString;
}
- (IBAction)handleDidPressBtn1{
NSLog(@"%@/n", [selfdateFromString:@"2011-08-09 12:02:01"]);
NSLog(@"%@/n", [selfstringFromDate:[selfdateFromString:@"2011-08-09 12:02:01"]]);
}
输出结果如下：
2011-08-09 04:02:01 +0000
2011-08-09 12:02:01 GMT+08:00
补充：
如果想显示中文的信息，可以加上本地化：
NSLocale *zh_Locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh-Hans"];
[dateFormatter setLocale:zh_Locale];
[zh_Locale release];