Re: Incompatible pointer type
Re: Incompatible pointer type
- Subject: Re: Incompatible pointer type
- From: "Jeffrey R. Kelley" <email@hidden>
- Date: Fri, 15 Jan 2010 10:28:05 -0500
| Gary,
It looks like you're passing an Objective-C string into a C function. Try this:
system([completeString cString]);
Jeffrey R. Kelley Campus Computing Sites Information and Technology Services University of Michigan
On Jan 15, 2010, at 10:23 AM, Gary McGill wrote:
I am trying to pass a variable to system(). The final code would look like this:
system(“lp –d Internal_Modem –o phone=555-5555 ~/Desktop/fileToFax.pdf”)
If I simply put this line in my code, it works fine. The problem is I have to get the phone number from the database. When I build the string using AppendString I get “warning: passing argument 1 of ‘system’ from incompatible pointer type. Here is the code that builds the string:
NSString *numberToCall = [faxNumber stringValue]; // this gets the fax number from the database
NSString *fileToPrint = @" ~/Desktop/fax.pdf";
NSString *firstPartOfString = @"lp -d Internal_Modem -o phone=";
NSString *addFaxNumber = [firstPartOfString stringByAppendingString:numberToCall];
NSString *completeString = [addFaxNumber stringByAppendingString:fileToPrint];
system(completeString); // THIS SHOULD WORK BUT DOES NOT
NSLog(completeString);
In the run log the NSLog(completeString) looks perfect.
It also says “sh: line 1: \240{\266x: command not found”
Why am I getting an incompatible pointer type?
Really all I need to do is pass the fax number variable to the system() call. If there is an easier way to do this I would greatly appreciate your comments.
Thanks,
Gary
|
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