I have the following question about NS_ENUM I'm creating one with three options:
typedef NS_ENUM(NSInteger, VersionStatus) {
OPTION1,
OPTION2,
OPTION3
};
How do I use else within a switch?
How will the comparison parameter come from a Service? Do they follow the creation order?
Being
OPTION1 = 1 (ou zero) , OPTION2 = 2, OPTION3
enum (or enumerated value) is a form, inherited from C, of declaring constant values.
Your base syntax is:
typedef NS_ENUM(NSInteger, ASRestaurantStatus) {
ASRestaurantStatusOpen,
ASRestaurantStatusClosed,
ASRestaurantStatusRenovating
};
The first element, without value definition, is always zero and the next element follows the sequence.
To use within a switch, nothing changes relative to a common integer, for example:
switch (currentStatus) {
case ASRestaurantStatusRenovating: {
} break;
case ASRestaurantStatusClosed: {
} break;
case ASRestaurantStatusOpen: {
} break;
}
They can be seen, in essence, as just a "safe" definition of something.