iphone - 从响应 NSString 中获取子字符串

Question

我需要从字符串中获取子字符串 CODE 的值 (X2.31)

NSString *str = @"SHMU=\"\" CODE=\"X2.31\" XTN=\";

我怎样才能得到那个特定的子字符串？

Answer 1

尝试下面的方法

  NSString *str = @"SHMU=\"\" CODE=\"X2.31\" XTN=\"";

 NSRange range = [str rangeOfString:@"CODE="];
 NSString *substring = [[str substringFromIndex:NSMaxRange(range)] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
 NSArray *str1 = [substring componentsSeparatedByString:@" "];
 NSLog(@"the sub %@",[[str1 objectAtIndex:0] stringByTrimmingCharactersInSet[NSCharacterSet whitespaceCharacterSet]]);

字符串是“X2.31”