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iOS Build a Vending Machine App in Swift Using the Vending Machine Updating the Price

Posted by Julian Gu
Julian Gu
12,490 Points

Shouldn't you change the currentSelection to nil after hitting the purchase button?

If this is not done, then even though the visual representation indicates that nothing is selected, the currentSelection variable is still holding the value of whatever is last selected. What this does is that you can keep hitting purchase and the vend method will keep being executed.

Joshua Hardy
Joshua Hardy
17,317 Points

Do you have any code or a program to go along with this question?

Kareem Jeiroudi
Kareem Jeiroudi
14,984 Points
Kareem Jeiroudi
Kareem Jeiroudi
14,984 Points

That's absolutely right! I think we should, because if you click 'purchase' again, it'll purchase the same item although it hasn't been selected. However, I haven't implemented it yet. If you have, let me know about how you've done it.

1 Answer

Thomas Dobson
Thomas Dobson
7,511 Points
Thomas Dobson
Thomas Dobson
7,511 Points

You have the right idea and have are correct about this bug. The solution I am afraid is not that simple. I wasn't able to get it to work correctly.