以下のようにパターン画像で文字色を設定できます。
[yourLable setTextColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"yourImageName"]]];
また、この次のコードで別の色を設定します.詳細なメイトでチュートリアルを確認してください..
NSString *test = @"Hello. That is a test attributed string.";
CFStringRef string = (CFStringRef) test;
CFMutableAttributedStringRef attrString = CFAttributedStringCreateMutable(kCFAllocatorDefault, 0);
CFAttributedStringReplaceString (attrString,CFRangeMake(0, 0), string);
/*
Note: we could have created CFAttributedStringRef which is non mutable, then we would have to give all its
attributes right when we create it. We can change them if we use mutable form of CFAttributeString.
*/
//Lets choose the colors we want to have in our string
CGColorRef _orange=[UIColor orangeColor].CGColor;
CGColorRef _green=[UIColor greenColor].CGColor;
CGColorRef _red=[UIColor redColor].CGColor;
CGColorRef _blue=[UIColor blueColor].CGColor;
//Lets have our string with first 20 letters as orange
//next 20 letters as green
//next 20 as red
//last remaining as blue
CFAttributedStringSetAttribute(attrString, CFRangeMake(0, 20),kCTForegroundColorAttributeName, _orange);
CFAttributedStringSetAttribute(attrString, CFRangeMake(20, 20),kCTForegroundColorAttributeName, _green);
CFAttributedStringSetAttribute(attrString, CFRangeMake(40, 20),kCTForegroundColorAttributeName, _red);
CFAttributedStringSetAttribute(attrString, CFRangeMake(60, _stringLength-61),kCTForegroundColorAttributeName, _blue);
詳細については、このチュートリアルを参照してください....
coretext-tutorial-for-ios-part
これがお役に立てば幸いです...