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;
}
輸入的日期字符串形如：@"1992-05-21 13:08:08"
- (NSDate*)dateFromString:(NSString*)dateString{
NSDateFormatter*dateFormatter = [[NSDateFormatteralloc]init];
[dateFormattersetDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate*destDate= [dateFormatterdateFromString:dateString];
[dateFormatterrelease];
returndestDate;
}
- (NSString*)stringFromDate:(NSDate*)date{
NSDateFormatter*dateFormatter = [[NSDateFormatteralloc]init];
//zzz表示時區，zzz可以刪除，這樣返回的日期字符將不包含時區信息。
[dateFormattersetDateFormat:@"yyyy-MM-dd HH:mm:ss zzz"];
NSString*destDateString = [dateFormatterstringFromDate:date];
[dateFormatterrelease];
returndestDateString;
}
- (IBAction)handleDidPressBtn1{
NSLog(@"%@/n", [selfdateFromString:@"2011-08-09 12:02:01"]);
NSLog(@"%@/n", [selfstringFromDate:[selfdateFromString:@"2011-08-09 12:02:01"]]);
}
輸出結果如下：
2011-08-09 04:02:01 +0000
2011-08-09 12:02:01 GMT+08:00
