NSString与NSDate互转

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];