Replace string in ios

Question

In objective-c I want to replace the string "AB\(cd" to "AB\\(cd". This is what I have tried

NSMutableString * str = @"AB\(cd";
NSString * replace = @"\\(";
[str stringByReplacingOccurrencesOfString:@"\("
                                       withString:replace];

NSLog(@"%@",str);

Result is "AB(cd" but I want it as "AB\\\(cd"

Please can somebody help me on this

@Popeye, I believe you have changed the total meaning of the question with the edit. — Prasad
– Prasad, Commented Sep 24, 2014 at 14:57
@user1190882 In what way? You can't replace a string using iOS you use code (In this case Objective-c) to replace the string so I have replaced this correctly — Popeye
– Popeye, Commented Sep 24, 2014 at 14:58
The code to this question doesn't make sense as it is stringByReplacingOccurrencesOfString:withString: returns a string and you don't pass it into str so str should remain as "AB\(cd" when NSLogging it. — Popeye
– Popeye, Commented Sep 24, 2014 at 14:59
Not to mention that the compiler won't like \( in the string literal. — Droppy
– Droppy, Commented Sep 24, 2014 at 15:00
@Popeye, in beginning, I can see it as "AB\\(CD", and ending I can see it as "AB\\\(CD" — Prasad
– Prasad, Commented Sep 24, 2014 at 15:06

Droppy · Accepted Answer · 2014-09-24 14:52:42Z

2

You forgot to assign the return value from [NSString stringByReplacingOccurrencesOfString:withString:]:

NSString *replaced = [str stringByReplacingOccurrencesOfString:@"\\("
                                                    withString:@"\\\\("];

However if you want to replace the original str then you need to re-assign it with a mutable copy as it's an NSMutableString:

str = [str stringByReplacingOccurrencesOfString:@"\\("
                                     withString:@"\\\\("] mutableCopy];

edited Sep 24, 2014 at 14:52

answered Sep 24, 2014 at 14:47

Droppy

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4 Comments

user3115014 Over a year ago

i want it to come as AB doublebackward slash (cd

Droppy Over a year ago

@user3115014 Yeah that's what the code in my answer should do.

user3115014 Over a year ago

if iam putting that in stackoverflow its triming one slash

Droppy Over a year ago

@user3115014 Ah I see; I've fixed the code in my answer.

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