How to truncate UITextView contents to fit a reduced size?

Question

I\'m having real trouble getting my head around this issue.

As the title suggests, I have several UITextViews on a view in an iPhone application. I am programmatically c

Answer 1

Here's a peace of code i wrote to truncate a string (by words) to fit a certain width and height:

- (NSString *)stringByTruncatingString:(NSString *)string toHeight:(CGFloat)height maxWidth:(CGFloat)width withFont: (UIFont *)font {

    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
    NSDictionary *attrDict = [NSDictionary dictionaryWithObjectsAndKeys:font, NSFontAttributeName, paragraphStyle, NSParagraphStyleAttributeName, nil];
    NSMutableString *truncatedString = [string mutableCopy];

    if ([string sizeWithAttributes: @{NSFontAttributeName: font}].height > height) {
        // this line is optional, i wrote for better performance in case the string is too big
        if([truncatedString length] > 150) truncatedString = [[truncatedString substringToIndex:150] mutableCopy];
        // keep removing the last word until string is short enough
        while ([truncatedString boundingRectWithSize:CGSizeMake(width, CGFLOAT_MAX) options:NSStringDrawingTruncatesLastVisibleLine|NSStringDrawingUsesLineFragmentOrigin attributes:attrDict context:nil].size.height > height) {
            NSRange wordrange= [truncatedString rangeOfString: @" " options: NSBackwardsSearch];
            truncatedString = [[truncatedString substringToIndex: wordrange.location] mutableCopy];
        }
        // add elipsis to the end
        truncatedString = [NSMutableString stringWithFormat:@"%@...",truncatedString];
    }
    return truncatedString;
}

Usage:

NSString *smallString = [self stringByTruncatingString:veryBigString toHeight:65 maxWidth:200 withFont:[UIFont systemFontSize:14.0f]];