Where Does Simulator iOS 8 Store Files

/Users/{YOUR NAME}/Library/Developer/CoreSimulator/

Devices/{DEVICE ID}/data/Containers/Data/Application/{APPLICATION ID}/

By Code:

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
       
        NSLog(@"%@",basePath);