Can you give an example when an object of a class is created on the stack instead of the heap?

In iOS, objects of classes are usually created on the heap, since classes are reference types. However, if you use structures (struct), which are value types, they are created on the stack.

Example:

struct Point {
    var x: Int
    var y: Int
}

func createPoint() {
    let p = Point(x: 10, y: 20) // created on the stack
    print(p)
}

Here, Point is a structure, and the variable p is created on the stack. For classes, for example:

class Person {
    var name: String
    init(name: String) {
        self.name = name
    }
}

func createPerson() {
    let person = Person(name: "John") // object on the heap, reference on the stack
    print(person.name)
}

Thus, class objects are created on the heap, while structures are on the stack.