Two ways to define a string variable in swift

Question

I'm just wondering if these two forms of variable definition are different. Or should be used in some special scenario.

var string1: String  {
    return "ok"
}

var string2: String = "ok"

Answer 1

The first approach is called the so-called computed property :

Classes, structures, and enumerations can define computed properties that do not actually hold value. Instead, they provide a getter and an additional installer to retrieve and set other properties and values ​​indirectly.

The form you use provides only getter for string1, which makes it read-only.

---

:

, . ( var), ( let).

- ( var).

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, . (, , ).

Answer 2

get string1, . :

var string1: String {
    get {
        return "ok1"
    }
}

string2 ok,