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    <h2>Original Answer <em>(iOS 6 and below)</em></h2> <p>Sadly, <code>UILabel</code> with <code>numberOfLines</code> wont do it if you need the view to be editable. Or you want <code>UITextView</code>'s (native) vertical alignment.</p> <p>Here's an <code>NSString</code> category that deletes words from a string, according to it's size in a rect:</p> <pre><code>@interface NSString (StringThatFits) - (NSString *)stringByDeletingWordsFromStringToFit:(CGRect)rect withInset:(CGFloat)inset usingFont:(UIFont *)font @end @implementation NSString (StringThatFits) - (NSString *)stringByDeletingWordsFromStringToFit:(CGRect)rect withInset:(CGFloat)inset usingFont:(UIFont *)font { NSString *result = [self copy]; CGSize maxSize = CGSizeMake(rect.size.width - (inset * 2), FLT_MAX); CGSize size = [result sizeWithFont:font constrainedToSize:maxSize lineBreakMode:UILineBreakModeWordWrap]; NSRange range; if (rect.size.height &lt; size.height) while (rect.size.height &lt; size.height) { range = [result rangeOfString:@" " options:NSBackwardsSearch]; if (range.location != NSNotFound &amp;&amp; range.location &gt; 0 ) { result = [result substringToIndex:range.location]; } else { result = [result substringToIndex:result.length - 1]; } size = [result sizeWithFont:font constrainedToSize:maxSize lineBreakMode:UILineBreakModeWordWrap]; } return result; } @end </code></pre> <p>For a <code>UITextView</code>, use an inset of 8 to account for the way UIKit draws them:</p> <pre><code>CGRect rect = aTextView.frame; NSString *truncatedString = [theString stringByDeletingWordsFromStringToFit:rect withInset:8.f usingFont:theTextView.font]; </code></pre> <h2>Updated Answer <em>(iOS 7)</em></h2> <p>Now <code>UITextView</code> uses TextKit internally, it's much easier.</p> <p>Rather than truncating the actual string, set the <code>text</code> (or <code>attributedText</code>) property to the whole string and truncate the amount of text <em>displayed</em> in the container (just like we do with <code>UILabel</code>):</p> <pre><code>self.textView.scrollEnabled = NO; self.textView.textContainer.maximumNumberOfLines = 0; self.textView.textContainer.lineBreakMode = NSLineBreakByTruncatingTail; </code></pre>
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