Getters and setters are methods that are used to enable the accessing and updating of an object’s instance variables. In Objective-C, getters and setters are typically created using the @property and @synthesize keywords.
Here's an example of how to use get/set in a class in Objective-C:
// MyClass.h file
@interface MyClass : NSObject
@property (nonatomic, strong) NSString *name;
@property (nonatomic, assign) NSInteger age;
@end
// MyClass.m file
@implementation MyClass
@synthesize name = _name;
@synthesize age = _age;
- (NSString *)name {
return _name;
}
- (void)setName:(NSString *)newName {
_name = [newName copy];
}
- (NSInteger)age {
return _age;
}
- (void)setAge:(NSInteger)newAge {
_age = newAge;
}
@end
// Example usage
MyClass *myObject = [[MyClass alloc] init];
// setting property values
[myObject setName:@"John"];
[myObject setAge:30];
// getting property values
NSString *name = [myObject name];
NSInteger age = [myObject age];
In the example above, we are declaring a class named MyClass with two instance variables, name and age, and creating get/set methods for both of them using @property and @synthesize. Then, we are creating an instance of MyClass and setting and getting values for the name and age properties using the setter and getter methods that we defined.