Question

I don’t know if it’s possible to declare a variable in objective c with some predefined values.

For example I want my object “Location” to have a variable called type whose possible values are: “street”, “city” or “country”.

The idea is to access it with something like:

Location *myLoction = [[Location alloc] init]
myLocation.type = city;

and later do something like:

if(myLocation.type == street) {
    //Do something here
}

Is that possible?

Answer 1

You are looking for enums:

typedef NS_ENUM(NSInteger, LocationType) {
    LocationTypeStreet,
    LocationTypeCity,
    LocationTypeCountry
};

@interface Location : NSObject 

@property (nonatomic) LocationType type;

@end

You have to prefix the values, because you don’t have namespaces.

if(myLocation.type == LocationTypeStreet) {
}