1。NSDate   转换成 字符串

NSDate convert to NSString:

1.

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

2.

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

3.

NSString *strDate = [dateFormatter stringFromDate:[NSDate date]];

4.

NSLog(@"%@", strDate);

5.

[dateFormatter release];

2。 字符串转换成NSSdate：

NSString convert to NSDate:

1.

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

2.

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

3.

NSDate *date = [dateFormatter dateFromString:@"2010-08-04 16:01:03"];

4.

NSLog(@"%@", date);

5.

[dateFormatter release];