Cannot use instance member 'getA' within property initializer; property initializers run before 'self' is available [duplicate]

问题

This question already has answers here:

How to initialize properties that depend on each other (4 answers)

Closed last year.

Y this giving this error - Cannot use instance member 'getA' within property initializer; property initializers run before 'self' is available

class A  {

    var asd : String  = getA()

    func getA() -> String {
        return "A"

    }
}

回答1:

Property initializer run before self is available.

The solution is to lazy initialize the property:

class A {
    lazy var asd: String  = getA()

    func getA() -> String {
        return "A"
    }
}

That will initialize the property first time you are trying to use it.

回答2:

You first need to initialize your asd variable. Then in the init you can apply your function value to it.

class A  {
var asd : String = ""

init() {
    self.asd = self.getA()
}

func getA() -> String {
    return "A"

} }

来源：https://stackoverflow.com/questions/53724345/cannot-use-instance-member-geta-within-property-initializer-property-initiali