Automatically align text in UILabel according to text language

Question

I\'m interested in setting some text into a UILabel, and depending on the directionality of the language (e.g., Hebrew - right-to-left [RTL], English - left-to-righ

Answer 1

There is a solution that is based on the language detection of the string.

Method returns NSTextAlignmentNatural if direction can not be identified.

@implementation NSString (StringAlignmentDetection)

- (NSTextAlignment)naturalTextAligment
{
    NSArray *tagschemes = [NSArray arrayWithObjects:NSLinguisticTagSchemeLanguage, nil];
    NSLinguisticTagger *tagger = [[NSLinguisticTagger alloc] initWithTagSchemes:tagschemes options:0];
    [tagger setString:self];
    NSString *language = [tagger tagAtIndex:0 scheme:NSLinguisticTagSchemeLanguage tokenRange:NULL sentenceRange:NULL];

    NSTextAlignment alignment = NSTextAlignmentNatural;

    if(!language)
    {
        return alignment;
    }

    NSLocaleLanguageDirection direction = [NSLocale characterDirectionForLanguage: language];

    switch (direction)
    {
        case NSLocaleLanguageDirectionLeftToRight:
            alignment = NSTextAlignmentLeft;
            break;

        case NSLocaleLanguageDirectionRightToLeft:
            alignment = NSTextAlignmentRight;
            break;

        default:
            alignment = NSTextAlignmentNatural;
            break;
    }

    return alignment;
}

@end