NSString uppercaseString example ios

[NSString uppercaseString]

Returns an uppercased representation of the receiver.

- (NSString *)uppercaseString

Return Value

A string with each character from the receiver changed to its corresponding uppercase value.

Discussion of [NSString uppercaseString]

Case transformations aren’t guaranteed to be symmetrical or to produce strings of the same lengths as the originals. See lowercaseString for an example.

Note: This method performs the canonical (non-localized) mapping. It is suitable for programming operations that require stable results not depending on the user's locale preference. For localized case mapping for strings presented to users, use the uppercaseStringWithLocale: method.

Example of [NSString uppercaseString]

- (NSString *)sentenceCapitalizedString {
    if (![self length]) {
        return [NSString string];
    }
    NSString *uppercase = [[self substringToIndex:1] uppercaseString];
    NSString *lowercase = [[self substringFromIndex:1] lowercaseString];
    return [uppercase stringByAppendingString:lowercase];
}

Example of [NSString uppercaseString]

NSString *input = @"ÁlgeBra";

  NSString *correctCase = [NSString stringWithFormat:@"%@%@",
                           [[input substringToIndex:1] uppercaseString],
                           [[input substringFromIndex:1] lowercaseString]];

  NSString *result = [[[NSString alloc] initWithData:[correctCase dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES] encoding:NSASCIIStringEncoding] autorelease];

  NSLog( @"%@", result );

Example of [NSString uppercaseString]

/* create a locale where diacritic marks are not considered important, e.g. US English */
NSLocale *locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"en-US"] autorelease];

NSString *input = @"Àlter";

/* get first char */
NSString *firstChar = [input substringToIndex:1];

/* remove any diacritic mark */
NSString *folded = [firstChar stringByFoldingWithOptions:NSDiacriticInsensitiveSearch locale:locale];

/* create the new string */
NSString *result = [[folded uppercaseString] stringByAppendingString:[input substringFromIndex:1]];