Swift equivalent of Java toString()

The description property is what you are looking for. This is the property that is accessed when you print a variable containing an object.

You can add description to your own classes by adopting the protocol CustomStringConvertible and then implementing the description property.

class MyClass: CustomStringConvertible {    var val = 17    public var description: String { return "MyClass: \(val)" }}let myobj = MyClass()myobj.val = 12print(myobj)  // "MyClass: 12"

description is also used when you call the String constructor:

let str = String(myobj)  // str == "MyClass: 12"

This is the recommended method for accessing the instance description (as opposed to myobj.description which will not work if a class doesn't implement CustomStringConvertible)

If it is possible to use the struct instead of class, then nothing additional to do.

struct just prints fine itself to the output

print("\(yourStructInstance)")

or with class like this:

print(String(describing: yourClassInstance))

You should use String(obj).

Direct from the documentation for CustomStringConvertible:

NOTE

String(instance) will work for an instance of any type, returning its description if the instance happens to be CustomStringConvertible. Using CustomStringConvertible as a generic constraint, or accessing a conforming type's description directly, is therefore discouraged.