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iOS Build a Vending Machine App in Swift 2.0 Displaying Additional Views Comparing Answers

Posted by M Talebi
M Talebi
3,125 Points

Why did we have to include 4 catches?

I don't understand why do we have to include 4 catches?

catch VendingMachineError.OutOfStock catch VendingMachineError.InsufficientFunds(let amountRequired) catch VendingMachineError.InvalidSelection catch let error

Since the function VendingMachine has three throws, shouldn't the three catches be enough to satisfy exhaustion?

1 Answer

Anjali Pasupathy
Anjali Pasupathy
28,883 Points
Anjali Pasupathy
Anjali Pasupathy
28,883 Points

You need the fourth catch to catch any unexpected errors.