encodeURIComponent in Objective-C

Objective-C #

NSString *str = CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(NULL, (__bridge CFStringRef)someStringToEncode, NULL, (__bridge CFStringRef)@"!*'\"();:@&=+$,/?%#[]% ", CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding)));

JavaScript #

var str = encodeURIComponent(str);