+ (NSArray*)rangesOfSubString:(NSString*)substring inString:(NSString*)string
{
? ? if (substring.length == 0
? ? ? ? || string.length == 0) {
? ? ? ? return nil;
? ? }
? ? NSMutableArray *rangeArray = [[NSMutableArray alloc] init];
? ? NSRange searchRange = NSMakeRange(0,string.length);
? ? NSRange foundRange;
? ? while (searchRange.location < string.length) {
? ? ? ? searchRange.length = string.length - searchRange.location;
? ? ? ? foundRange = [string rangeOfString:substring options:NSCaseInsensitiveSearch range:searchRange];
? ? ? ? if (foundRange.location != NSNotFound) {
? ? ? ? ? ? // found an occurrence of the substring! do stuff here
? ? ? ? ? ? searchRange.location = foundRange.location+foundRange.length;
? ? ? ? ? ? [rangeArray addObject:[NSValue valueWithRange:foundRange]];
? ? ? ? } else {
? ? ? ? ? ? // no more substring to find
? ? ? ? ? ? break;
? ? ? ? }
? ? }
? ? return rangeArray;
}
