Add in the middle of NSString on iPhone

Question

how to add string value between nsstring?

eg:

NSString* str1 = @"Hello";

NSString* str2 = @"Hi.."/*add contents of str1*/@"how r u??";

Please tell me how to do this?

Answer 1

(Adding always means adding to the end. This is the insertion of a line in the middle.)

If you just want to build a literal string, use

#define STR1 @"Hello"
NSString* str2 = @"Hi..." STR1 @" how r u??";

To insert it at runtime, you need to convert str2 to a mutable string and call -insertString:atIndex:.

NSMutableString* mstr2 = [str2 mutableCopy];
[mstr2 insertString:str1 atIndex:4];
return [mstr2 autorelease];

Answer 2

There are several possible answers. It depends a little on how you want to figure out where to insert the text. One of the possibilities:

NSString *outStr = [NSString stringWithFormat:"%@%@%@", [str2 substringToIndex:?], str1, [str2 substringFromIndex:?]];