Question about manipulating user entered text (performing a calculation)

[sperryman]

Hello! I am trying out MMF2, and am having some issues with performing a calculation on some user entered text. I have been working on creating an iOS app with some financial calculators in Corona SDK, and thought it might be interesting to try it in MMF2.

I am using a pair of iOS Single Line Edit boxes, as well as an iOS button. I have been able to get input text to display in a string object by using a button clicked event to set an alterable string to Text$( "editBox1" ), then displaying the alterable text. The problem I am having is two fold; one being that this text is a string and not an int, and two is that I cannot figure out how to get the two values converted to intergers and perform a simple calculation on them.

Ideally I would be able to set the alterable string to Val( "editBox1" ) + Val( "editBox2" ), but when I do that it asks me to enter an alphanumeric string. When I try to use just Val( "editBox1" ) it gives me that same error.

I know that this function exists, I am just not finding any reference to how to perform the task. Any help would be greatly appreciated!

Sean

[macca02]

Hi. Maybe try:
Set alterable string to:

This gets the numeric value of the edit boxes, adds together and converts to string
Str$(Edit Value( "Edit Box 1" )+Edit Value( "Edit Box 2" ))

or

This gets the text, converts them to values, adds together, converts back to string
Str$(Val(Edittext$( "Edit Box 1" ))+Val(Edittext$( "Edit Box 2" )))

Both produce the same outcome.

What you were doing was correct, however you just needed to encompass it all and covert to a string.

[sperryman]

Str$(Edit Value( "Edit Box 1" )+Edit Value( "Edit Box 2" ))

or

Str$(Val(Edittext$( "Edit Box 1" ))+Val(Edittext$( "Edit Box 2" )))

I tried both of the strings you suggested, but it wasn't working for me. However, expanding upon your suggestion I was able to come up with Str$(Val(Text$( "editBox1" ))+Val(Text$( "editBox2" ))) and that does seem to work. Now, if I can figure out how to clear the text when clicking the button I think I will be in business. Thanks!

Sean

[macca02]

The example i used was with the Edit Box. but i'm guessing the edit box for IOS is different thats why the expression didn't work.
To clear the edit box from a button press:

*Button clicked:
Set text to ""

That essentially clears it.

Is that what you're after or something else?

Hope it helps!