How to capitalize the first word of the sentece in Objective C?

Question

I've already found how to capitalize all words of the sentence, but not the first word only.

NSString *txt =@"hi my friends!"
[txt capitalizedString];

I don't want to change to lower case and capitalize the first char. I'd like to capitalize the first word only without change the others.

Answer 1

Use

- (NSArray *)componentsSeparatedByCharactersInSet:(NSCharacterSet *)separator

and capitalize the first object in the array and then use

- (NSString *)componentsJoinedByString:(NSString *)separator

to join them back

Answer 2

For the sake of having options, I'd suggest:

NSString *myString = [NSString stringWithFormat:@"this is a string..."];

char *tmpStr = calloc([myString length] + 1,sizeof(char));

[myString getCString:tmpStr maxLength:[myString length] + 1 encoding:NSUTF8StringEncoding];

int sIndex = 0;

/* skip non-alpha characters at beginning of string */
while (!isalpha(tmpStr[sIndex])) {
    sIndex++;
}

toupper(tmpStr[sIndex]);

myString = [NSString stringWithCString:tmpStr encoding:NSUTF8StringEncoding];

I'm at work and don't have my Mac to test this on, but if I remember correctly, you couldn't use [myString cStringUsingEncoding:NSUTF8StringEncoding] because it returns a const char *.

Answer 3

Here is another go at it:

NSString *txt = @"hi my friends!"
txt = [txt stringByReplacingCharactersInRange:NSMakeRange(0,1) withString:[[txt substringToIndex:1] uppercaseString]];