objective-c : automatically extract first line of string, based on the first few words

automatically extract first line of string, based on the first few words.m

// automatically extract first line of string, based on the first few words
// for example, can using this for title of note 

//.h
//
@property NSString* contents;
@property (readonly) NSString* title;

//.m

- (NSString *)title {
    // split into lines
    NSArray* lines = [self.contents componentsSeparatedByCharactersInSet: [NSCharacterSet newlineCharacterSet]];
    
    // return the first
    return lines[0];
}