how can i sort an NSMutableArray in objective-c [duplicate]

This question already has answers here: Cl开发者_JS百科osed 11 years ago.

Possible Duplicate:

Sort NSArray of date strings or objects

Hello, I want to sort an NSMutableArray. The MutableArray contain NSstrings.Strings have this form "20112505" YYYY-MM-DD . How can i sort it ? thank you

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[yourMutableArray sortUsingSelector:@selector(compare:)];