How to get all NSRange of a particular character in a NSString?

Question

I have two NSStrings: orgText and searchLetter. I want to highlight every occurrences of the searchLetter in the orgText with a red color. How can I get the NSRange of all occurrences of the searchLetter ? for eg : suppose: orgText = "abcahaiapaoiuiapplma" searchLetter = "a". I want to hightlight all "a" occurrences in "abcahaiapaoiuiapplma" with red color. Thanks. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

I wrote this method for my project - SUITextView with highlight: - (NSMutableAttributedString*) setColor:(UIColor*)color word:(NSString*)word inText:(NSMutableAttributedString*)mutableAttributedString { NSUInteger count = 0, length = [mutableAttributedString length]; NSRange range = NSMakeRange(0, length); while(range.location != NSNotFound) { range = [[mutableAttributedString string] rangeOfString:word options:0 range:range]; if(range.location != NSNotFound) { [mutableAttributedString setTextColor:color range:NSMakeRange(range.location, [word length])]; range = NSMakeRange(range.location + range.length, length - (range.location + range.length)); count++; } } return mutableAttributedString; } And in my category of NSMutableAttributedString: - (void) setTextColor:(UIColor*)color range:(NSRange)range { // kCTForegroundColorAttributeName [self removeAttribute:(NSString*)kCTForegroundColorAttributeName range:range]; // Work around for Apple leak [self addAttribute:(NSString*)kCTForegroundColorAttributeName value:(id)color.CGColor range:range]; }