how to know the path of file in iphone sdk?

i want to connect database to iphone sdk but it is taking the default path inside the system folders but not in the app bundle ?how can i change the file path from that system directory to f开发者_C百科ile in my app bundle?

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This should retrive your app's document folder path :

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];