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    <h2>CoreText or TextKit</h2> <p>You need to add "soft hyphenation" to the string. These are "-" which is not visible when rendered, but instead merely queues for CoreText or UITextKit to know how to break up words.</p> <p>The soft hyphen sign which you should place in the text is:</p> <pre><code>unichar const kTextDrawingSoftHyphenUniChar = 0x00AD; NSString * const kTextDrawingSoftHyphenToken = @"­"; // NOTE: UTF-8 soft hyphen! </code></pre> <p>Example code</p> <pre><code>NSString *string = @"accessibility tests and frameworks checking"; NSLocale *locale = [NSLocale localeWithLocaleIdentifier:@"en_US"]; NSString *hyphenatedString = [string softHyphenatedStringWithLocale:locale error:nil]; NSLog(@"%@", hyphenatedString); </code></pre> <p>Outputs <code>ac-ces-si-bil-i-ty tests and frame-works check-ing</code></p> <hr> <h3>NSString+SoftHyphenation.h</h3> <pre><code>typedef enum { NSStringSoftHyphenationErrorNotAvailableForLocale } NSStringSoftHyphenationError; extern NSString * const NSStringSoftHyphenationErrorDomain; @interface NSString (SoftHyphenation) - (NSString *)softHyphenatedStringWithLocale:(NSLocale *)locale error:(out NSError **)error; @end </code></pre> <h3>NSString+SoftHyphenation.m</h3> <pre><code>NSString * const NSStringSoftHyphenationErrorDomain = @"NSStringSoftHyphenationErrorDomain"; @implementation NSString (SoftHyphenation) - (NSError *)hyphen_createOnlyError { NSDictionary *userInfo = @{ NSLocalizedDescriptionKey: @"Hyphenation is not available for given locale", NSLocalizedFailureReasonErrorKey: @"Hyphenation is not available for given locale", NSLocalizedRecoverySuggestionErrorKey: @"You could try using a different locale even though it might not be 100% correct" }; return [NSError errorWithDomain:NSStringSoftHyphenationErrorDomain code:NSStringSoftHyphenationErrorNotAvailableForLocale userInfo:userInfo]; } - (NSString *)softHyphenatedStringWithLocale:(NSLocale *)locale error:(out NSError **)error { CFLocaleRef localeRef = (__bridge CFLocaleRef)(locale); if(!CFStringIsHyphenationAvailableForLocale(localeRef)) { if(error != NULL) { *error = [self hyphen_createOnlyError]; } return [self copy]; } else { NSMutableString *string = [self mutableCopy]; unsigned char hyphenationLocations[string.length]; memset(hyphenationLocations, 0, string.length); CFRange range = CFRangeMake(0, string.length); for(int i = 0; i &lt; string.length; i++) { CFIndex location = CFStringGetHyphenationLocationBeforeIndex((CFStringRef)string, i, range, 0, localeRef, NULL); if(location &gt;= 0 &amp;&amp; location &lt; string.length) { hyphenationLocations[location] = 1; } } for(int i = string.length - 1; i &gt; 0; i--) { if(hyphenationLocations[i]) { [string insertString:@"-" atIndex:i]; } } if(error != NULL) { *error = nil;} return string; } } @end </code></pre>
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    1. POHyphenation in native iOS app
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    1. COVery nice, thank you! I am using NSAttributedText having hyphenation factor set to 1. It's also working, but I like your solution more (since its more generic).
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      1. USChris
 

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