Finding a not constant char.set in an NSString

I have an NSString with data for ex.:

{SCENE*169/doprava/doprava_tabulka {} {} {} 1299234095} {SCENE*169/doprava/doprava_video {} {} {} 1299234166}

I would like delete parts "brackests and the number", but the numers are not constatnt.

{} 开发者_运维知识库{} {} 1299234095 {} {} {} 1299234166

How can I delete this?

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I'd use NSRegularExpression

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:
                              @"((?: \\{\\}){3} [0-9]+)" options:0 error:nil];
NSMutableString *str = [NSMutableString stringWithString:
                        @"{SCENE*169/doprava/doprava_tabulka {} {} {} 1299234095} {SCENE*169/doprava/doprava_video {} {} {} 1299234166}"];

[regex replaceMatchesInString:str options:0 range:NSMakeRange(0, [str length]) withTemplate:@""];

str value here is {SCENE*169/doprava/doprava_tabulka} {SCENE*169/doprava/doprava_video}

But if you develop for iOS, it's only available since 3.2.