Remove characters from NSString?

Question

NSString *myString = @"A B C D E F G";

I want to remove the spaces, so the new string would be "ABCDEFG".

score 283 · Answer 1 · edited Aug 12 '12 at 09:12

283

You could use:

NSString *stringWithoutSpaces = [myString 
   stringByReplacingOccurrencesOfString:@" " withString:@""];

edited Aug 12 '12 at 09:12

Mundi

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answered May 29 '09 at 12:45

Tom Jefferys

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Please can you format code snippets in a monospaced font for legibility. At present distinguishing the first string is a little tricky – Mike Abdullah May 30 '09 at 09:30
4

Note that “occurrences” is spelled with two r's. – Feb 15 '11 at 01:32
plus 1 in hope of reaching 256. smh – Will Von Ullrich Apr 11 '17 at 02:52
This ONLY works if the 'spaces' are well behaved ASCII value=32 (%20) characters. To remove ALL possible white-space chars use Jim Dovey's solution below. – Linasses Apr 28 '20 at 11:23

score 79 · Answer 2 · edited Jul 07 '13 at 23:10

79

If you want to support more than one space at a time, or support any whitespace, you can do this:

NSString* noSpaces =
    [[myString componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]
                           componentsJoinedByString:@""];

edited Jul 07 '13 at 23:10

answered May 29 '09 at 16:41

Jim Dovey

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It is more useful for general usage. – mxg Jan 06 '11 at 13:01
i like it! I want to remove all special char in a phone number and keep only digits. – karim Mar 15 '11 at 16:23
much easier: yourString = [yourString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]; – Daniel May 07 '13 at 16:50
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Trimming only removes matching characters when they occur at the beginning and end of the string, so ` A B C D E F ` would become `A B C D E F`. – Jim Dovey May 15 '13 at 16:50

score 11 · Answer 3 · answered Mar 21 '11 at 10:28

Taken from NSString

stringByReplacingOccurrencesOfString:withString:

Returns a new string in which all occurrences of a target string in the receiver are replaced by another given string.

- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement

Parameters

target

The string to replace.

replacement

The string with which to replace target.

Return Value

A new string in which all occurrences of target in the receiver are replaced by replacement.

score 10 · Answer 4 · answered Nov 09 '12 at 12:32

10

All above will works fine. But the right method is this:

yourString = [yourString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

It will work like a TRIM method. It will remove all front and back spaces.

Thanks

answered Nov 09 '12 at 12:32

Mitesh Khatri

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Nope, it only removes spaces from the start and end of the string, not spaces in between other characters. – Jim Dovey May 15 '13 at 16:51
@JimDovey I already mention this thing in my comment. #It will work like a TRIM method. It will remove all front and back spaces.# – Mitesh Khatri May 18 '13 at 18:29
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@MiteshKhatri You do, but it still doesn't solve the original problem, which is to remove all whitespace from within the middle of the string, not just leading & trailing whitespace. – Jim Dovey May 21 '13 at 17:22
@JimDovey for remove all spaces use below code: MyStr = [MyStr stringByReplacingOccurrencesOfString:@" " withString:@""]; – Mitesh Khatri Jul 26 '16 at 07:37
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That'll still only remove ASCII space characters; things like zero-width spaces, Unicode non-breaking spaces, newlines, form feeds, tabs, vertical tabs, and so on will still remain in the string. Hence the existence of `[NSCharacterSet whitespaceCharacterSet]` and `[NSCharacterSet whitespaceAndNewlineCharacterSet]`. – Jim Dovey Nov 29 '16 at 00:03

score 6 · Answer 5 · answered Aug 12 '12 at 09:49

if the string is mutable, then you can transform it in place using this form:

[string replaceOccurrencesOfString:@" "
                        withString:@""
                           options:0
                             range:NSMakeRange(0, string.length)];

this is also useful if you would like the result to be a mutable instance of an input string:

NSMutableString * string = [concreteString mutableCopy];
[string replaceOccurrencesOfString:@" "
                        withString:@""
                           options:0
                             range:NSMakeRange(0, string.length)];

score 4 · Answer 6 · answered Oct 23 '12 at 13:31

You can try this

- (NSString *)stripRemoveSpaceFrom:(NSString *)str {
    while ([str rangeOfString:@"  "].location != NSNotFound) {
        str = [str stringByReplacingOccurrencesOfString:@" " withString:@""];
    }
    return str;
}

Hope this will help you out.

Remove characters from NSString?

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