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iOS Object-Oriented Objective-C Memory, Arrays and Loops, Oh My! Immersive Example - Gabe's KFC

Daniel Kokin
Daniel Kokin
1,496 Points
Posted by Daniel Kokin
Daniel Kokin
1,496 Points

Confused about why I use integerValue

I don't fully understand why it's necessary to add integerValue after 'orderItem' in the switch statement. If the elements in the 'orderArray' are strings why am I converting the element and then comparing it to another string in each case?

    for (NSNumber *orderItem in orderArray) {

        switch ([orderItem integerValue]) {
            case Bucket:
                revenue = revenue + bucket;
                cost = cost + bucketCost;
                break;

1 Answer

Matt Casanova
Matt Casanova
15,864 Points

Take a look at my answer to your last questions because it is related. Since an enum is just a name for a constant integer value and those values are stored in the array as NSNumber objects you need to covert to from NSObject* to the actual integer inside to use the switch statement. Use the the integerValue method on an NSNumber object to convert to an int.