Remove white space from the left of NSString

Question

I need to remove the white space only from the left of NSString I mean

if I have " This is a good day" I will have "This is a good day"

only the left spaces only

any suggestion please

@Jhaliya, *stringByTrimmingCharactersInSet:* this is the method he actually looks for. In his question he asked *"Remove white space from the left of NSString"* because the string in his example has white space at the left end only. — EmptyStack, Jun 08 '11 at 12:31
@Simon : you are right , Got you Simon, I thought, he has some specific requirement to remove from left. you could add your answer. — Jhaliya - Praveen Sharma, Jun 08 '11 at 12:33
http://stackoverflow.com/questions/5689288/how-to-remove-whitespace-from-right-end-of-nsstring — vijay adhikari, Jun 08 '11 at 12:24

Amit Singh · Accepted Answer · 2011-06-08T12:45:05.043

70

Just use

NSString* result = [yourString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

it will remove all extra space from left as well as right but not from middle

and to remove both white space and \n use

NSString* result = [yourString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

edited Jun 08 '11 at 12:45

answered Jun 08 '11 at 12:23

Amit Singh

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how to remove \n using the same method – AMH Jun 08 '11 at 12:27
for removing new line character what i do, whitespaceAndNewlineCharacterSet not working that only remove white space – Jignesh B Dec 03 '13 at 11:10

score 4 · Answer 2 · answered Jun 08 '11 at 12:31

4

Use below to remove white and new line chatacter from your NSString.

NSString* result = [yourString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

answered Jun 08 '11 at 12:31

Jhaliya - Praveen Sharma

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@ Simon :Read my comment on question ? – Jhaliya - Praveen Sharma Jun 08 '11 at 12:34
+1, For forcing me to delete my answer. Just kidding. +1 for the correct answer :-) – EmptyStack Jun 08 '11 at 12:43

score 2 · Answer 3 · answered Mar 15 '12 at 07:21

2

Nsstring *str="   This is a good day";

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

nslog(@"string after removing space %@",)

answered Mar 15 '12 at 07:21

sinh99

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This is a terrible solution that does not work correctly for many other possible cases, such as @" This is a good day", and it leaves a leading space in the string. How did this get upvoted?? – Thomas Tempelmann Mar 07 '18 at 15:02

score 0 · Answer 4 · answered Dec 10 '14 at 19:51

Here's a solution I came up with when facing the same issue:

- (NSString*)trimBlankCharactersFromBeginningOfString:(NSString*)originalString
{
    //we are only trimming the characters on the left side of the string
    NSInteger count = [originalString length];
    NSString *trimmedNewText = originalString;
    for (int i = 0; i < count; i++) {
        if([[originalString substringWithRange:NSMakeRange(i, 1)] rangeOfCharacterFromSet:[NSCharacterSet whitespaceCharacterSet]].location == NSNotFound)
        {
            trimmedNewText = [originalString substringFromIndex:i];
            break;
        }
        else
        {
            if(i+1 < count)
            {
                trimmedNewText = [originalString substringFromIndex:i+1];
            }
            //since we are exiting the loop as soon as a non blank space character is found
            //then this is just really checking to see if we are on the last character of an
            //all whitespace string. can't say i+1 here because that would give an index out
            //of bound exception
            else
            {
                trimmedNewText = @"";
            }
        }
    }
    return trimmedNewText;
}

score 0 · Answer 5 · answered Nov 09 '17 at 20:20

For trimming only to the left a solution is to add a dummy character to the right of your string, trim the string, and then remove it.

NSString* tempString = [NSString stringWithFormat@"%@T", yourString];
NSString* result = [yourString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
return [result substringToIndex:[result length]-1];

score 0 · Answer 6 · answered Nov 23 '18 at 11:35

0

ONLY the left whitespaces

while ([[yourString substringToIndex:1] isEqualToString:@" "])
    yourString = [yourString substringFromIndex:1];

answered Nov 23 '18 at 11:35

quarac

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Nitish · Answer 7 · 2011-06-08T12:35:31.557

-1

NSString *str = @" This is a good day";    
NSArray *arrString = [str componentsSeparatedByString:@"T"];
NSString *strSpace = [arrString objectAtIndex:0];   // White space
NSString *strString = [arrString objectAtIndex:1];   //This is a good day

You can then append T in the string as

NSString *strT = @"T";
strString = [strT stringByAppendingString:strString];

edited Jun 08 '11 at 12:35

answered Jun 08 '11 at 12:24

Nitish

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Remove white space from the left of NSString

7 Answers7