iOS how to copy/reference a C-Array?

Question

I have 3 arrays with ints (enums):

static int *openEnv[] = {INGMenuItemLogon,INGMenuItemSpace,INGMenuItemAppointment,INGMenuItemInfo,INGMenuItemSettings};
static int *closedEnv[] = {INGMenuItemLogoff,INGMenuItemSpace,INGMenuItemOverview,INGMenuItemAccounts,INGMenuItemTransfer,INGMenuItemAnalyse,INGMenuItemAppointment,INGMenuItemInfo,INGMenuItemSettings};
int *currentEnv[];

if the user taps on a button i want the currentEnv to change to the openEnv or closedEnv

- (void) tap
{
    if( closed ) currentEnv = closedEnv;
    else currentEnv = openEnv;
}

But this gives a build errors. openEnv and closedEnv have 2 different sizes, what should i do to copy it? What can i do so that it makes a reference or copy to its static array?

Those are not arrays of enums, they are arrays of pointers to ints. — molbdnilo
– molbdnilo, Commented Apr 25, 2013 at 10:52
Please revise your question. Are all tags really appropriate? At least decide on the used language! — stefan
– stefan, Commented Apr 25, 2013 at 13:29

Leo Chapiro · Accepted Answer · 2013-04-25 10:43:09Z

2

Try this:

static int *openEnv[] = {INGMenuItemLogon,INGMenuItemSpace,INGMenuItemAppointment,INGMenuItemInfo,INGMenuItemSettings};
static int *closedEnv[] = {INGMenuItemLogoff,INGMenuItemSpace,INGMenuItemOverview,INGMenuItemAccounts,INGMenuItemTransfer,INGMenuItemAnalyse,INGMenuItemAppointment,INGMenuItemInfo,INGMenuItemSettings};
//int *currentEnv[];
int **currentEnv;

- (void) tap
   {
     if( closed ) 
        currentEnv = closedEnv;
     else 
        currentEnv = openEnv;
   }

answered Apr 25, 2013 at 10:43

Leo Chapiro

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2 Comments

Andy Jacobs Over a year ago

how can i get an int out the array then, currentEnv[0] gives Statement requires expression of integer type ('int *' invalid)

Leo Chapiro Over a year ago

BTW: I supposed you wanted to have an array of pointers, if you need an array of integers so do it like Martin R said.

Martin R · Accepted Answer · 2013-04-25 10:56:15Z

1

You have declared arrays of pointers to int. Correct would be

static int openEnv[] = {INGMenuItemLogon,INGMenuItemSpace,INGMenuItemAppointment,INGMenuItemInfo,INGMenuItemSettings};
static int closedEnv[] = {INGMenuItemLogoff,INGMenuItemSpace,INGMenuItemOverview,INGMenuItemAccounts,INGMenuItemTransfer,INGMenuItemAnalyse,INGMenuItemAppointment,INGMenuItemInfo,INGMenuItemSettings};

(without the star *) to declare arrays of int, and

int *currentEnv;

as pointer to int. Then you can assign e.g. currentEnv = openEnv so that currentEnv points to the elemens of openEnv.

edited Apr 25, 2013 at 10:56

answered Apr 25, 2013 at 10:50

Martin R

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1 Comment

Leo Chapiro Over a year ago

+1 supposed that OP wanted to have an array of integers instead of array of pointers to integers :)

Dan Shelly · Accepted Answer · 2013-04-25 10:44:13Z

1

Just use: int ** currentEnv = <the array>

answered Apr 25, 2013 at 10:44

Dan Shelly

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