How to highlight search string in AutoComplete results for IOS5? - objective-c

Question

Google autocomplete would bolden what we search
For example: If we search for hell we'll see "hell o"
I think I need attributed string, so my code is:
- (NSMutableAttributedString*) highlightSearchString:(NSString*)substringToHighlight{
NSMutableAttributedString * mutableAttributedString = [[ NSMutableAttributedString alloc]initWithString:self];
NSUInteger count = 0, length = [mutableAttributedString length];
NSRange range = NSMakeRange(0, length);
count = 0,
length = [mutableAttributedString length];
range = NSMakeRange(0, length);
while(range.location != NSNotFound)
{
range = [[mutableAttributedString string] rangeOfString:substringToHighlight options:0 range:range];
if(range.location != NSNotFound) {
//[mutableAttributedString setTextColor:[UIColor blueColor] range:NSMakeRange(range.location, [word length])];
NSString *boldFontName = [[UIFont boldSystemFontOfSize:12] fontName];
NSDictionary * dict = #{NSFontAttributeName:boldFontName};
NSRange rangeHighlight = NSMakeRange(range.location, substringToHighlight.length);
[mutableAttributedString setAttributes:dict range:rangeHighlight];
range = NSMakeRange(range.location + range.length, length - (range.location + range.length));
count++;
}
}
return mutableAttributedString;
}
But it doesn't work because NSFontAttributeName is available only in iOS6.
After that I need to update the tableViewCell
cell.textLabel.text=text;
with something that take advantage of the atributed text.

Answer 1

Just use the CoreText definition for the font:
UIFont *font = [UIFont boldSystemFontOfSize:12];
CTFontRef ctFontRef = CTFontCreateWithName((__bridge CFStringRef)font.fontName, font.pointSize, NULL);
NSDictionary * dict = #{(NSString *)kCTFontAttributeName : (__bridge id) ctFontRef};
For the seconds problem:
The default UILabel in the iOS SDK only supports NSAttributedString from iOS 6. Thus in
iOS 5 you will either have to draw the NSAttributedString your self using CoreText of get some third part label that does support NSAttributedString like: TTTAttributedLabel.