dpaulso@k30b.nswc.navy.mil (Dave Paulson) (05/07/91)
I'm trying to use IB to put together a real simple application, and I seem to be having some trouble getting float values out of my three-celled input form. I'm using code more or less like X=[myForm floatValueAt:i] where X is a float, myForm is the id of the Form object that I dragged in from IB, and i is the integer index of the cell that i'm interested in within the form. Does this look reasonable? If it does, then how about the connections I've established in IB: The input form is connected to a button, which is connected to an object that is a subclass of Object. This object contains the method that gathers the float values from the form, and then writes to an outputForm. The writing step works, but the result is bogus because the reading step is not working. In fact, even [myForm getNumRows:&r numCols:&c] returns bogus values for ints ``r'' and ``c''. Is this a related problem? Thanks in advance for any hints or help! /dave -- Dave Paulson dpaulso@relay.nswc.navy.mil (work) Synetics/NAVSWC talos!SandBox!dave@uunet.uu.net (home,NeXTmail)
sdd@oceania (05/09/91)
In article <1991May7.164814.15885@relay.nswc.navy.mil> dpaulso@k30b.nswc.navy.mil (Dave Paulson) writes: > I'm trying to use IB to put together a real simple application, and I > seem to be having some trouble getting float values out of my > three-celled input form. > > I'm using code more or less like > > X=[myForm floatValueAt:i] > > where X is a float, myForm is the id of the Form object that I dragged > in from IB, and i is the integer index of the cell that i'm interested > in within the form. > > Does this look reasonable? If it does, then how about the connections > I've established in IB: > > The input form is connected to a button, which is connected to an object > that is a subclass of Object. This object contains the method that > gathers the float values from the form, and then writes to an > outputForm. The writing step works, but the result is bogus because the > reading step is not working. > > In fact, even [myForm getNumRows:&r numCols:&c] > returns bogus values for ints ``r'' and ``c''. > Is this a related problem? > > Thanks in advance for any hints or help! > > /dave > > -- > Dave Paulson dpaulso@relay.nswc.navy.mil (work) > Synetics/NAVSWC talos!SandBox!dave@uunet.uu.net (home,NeXTmail) Forgive me if this response is obvious (i.e. something you have already considered), just thought I would share my $0.02. When dragging connections to forms in interface builder, it is very easy to make the connection to one of the cells instead of the entire form. I imagine if you did this, your program would probably crash with an IOT trap error (FormCell does not respond to someMethodDefinedInForm). Have you tried using gdb to inspect the id of the form object you are using. I have found this to be one of the best ways to track wild objects. In gdb, if the pointer you have to the form is called myForm, then you can look at all the instance variables, etc. with: (gdb) p *myForm If this shows you something crazy, then you know you got problems. If you can't make much of it, do a: (gdb) p (char *)[myForm name] this will display the name of the object, like: "Form", or "FormCell", etc. Hope this helps some. -- +-----------------------------+ | Steve Dakin | | oceania!sdd@uunet.uu.net | | (NeXT mail) | +-----------------------------+ -- +-----------------------------+ | Steve Dakin | | oceania!sdd@uunet.uu.net | | (NeXT mail) |