Return a word-wrapped NSString from a longer NSString [duplicate]

Answer 1

Seems like there is no factory way of doing this, so have started constructing a class function to handle this, based on the solution introduced at this closely related stack :

+ (NSString*)wrappedString:(NSString*)string withFont:(UIFont*)font andWidth:(float)width {
    NSMutableString *resultString = [[NSMutableString alloc] initWithString:@""];

    CGSize textSize = [string sizeWithFont:font];
    float textWidth = textSize.width;
    if (textWidth < width) {
        return string;
    }
    float wordLength;
    float lineLength;
    NSUInteger length = [string length];
    unichar buffer[length];
    [string getCharacters:buffer range:NSMakeRange(0, length)];

    NSString *singleLine = @"";
    NSString *word = @"";
    NSString *longWord = @"";

    for (NSUInteger i = 0; i < length; i++) {

        unichar character = buffer[i];
        if (character != '\n') {
            word = [NSString stringWithFormat:@"%@%c", word, character];
        }

        if (character == '\n') {
            float wordLength = [word sizeWithFont:font].width;
            float lineLength = [singleLine sizeWithFont:font].width;
            if ((lineLength + wordLength) > width) {
                [resultString appendString:singleLine];
                [resultString appendString:@"\n"];
                singleLine = @"";
                singleLine = [singleLine stringByAppendingFormat:@"%@\n",word];
                word = @"";
            } else {
                singleLine = [singleLine stringByAppendingString: word];
                word = @"";
                [resultString appendString:singleLine];
                [resultString appendString:@"\n"];
                singleLine = @"";
            }
        }

        else if (character == ' ') {
            float wordLength = [word sizeWithFont:font].width;
            float lineLength = [singleLine sizeWithFont:font].width;

            if ((lineLength + wordLength) > width) {
                if (wordLength > textWidth) {
                    [resultString appendString:singleLine];
                    [resultString appendString:@"\n"];
                    singleLine = @"";
                    int j = 0;
                    for (; j < [word length]; j++) {
                        unichar longChar = [word characterAtIndex:j];
                        longWord = [NSString stringWithFormat:@"%@%c", longWord, longChar];
                        float longwordLength = [longWord sizeWithFont:font].width;
                        float longlineLength = [singleLine sizeWithFont:font].width;
                        if ((longlineLength + longwordLength) >= width) {
                            singleLine = [singleLine stringByAppendingString:longWord];
                            word = @"";
                            longWord = @"";
                            break;
                        }
                    }

                }
                [resultString appendString:singleLine];
                [resultString appendString:@"\n"];
                singleLine = @"";
            }
            singleLine = [singleLine stringByAppendingString: word];
            word = @"";
        }
    }

    wordLength = [word sizeWithFont:font].width;
    lineLength = [singleLine sizeWithFont:font].width;

    if (wordLength > 0) {
        if ((lineLength + wordLength) > width) {
            [resultString appendString:singleLine];
            [resultString appendString:@"\n"];
            singleLine = @"";
        }
        singleLine = [singleLine stringByAppendingString:word];
    }


    if (lineLength > 0) {
        [resultString appendString:singleLine];
        [resultString appendString:@"\n"];
    }
    return resultString;
}