如何在同一个快速框架中访问其他类？

Question

In my swift framework, I define two class , call A and B, but it build for error.

 // in a.swift
 public class A : NSObject {
    public var count
    public override init() {
          count = 10
    }
 }

 // in b.swift
 public class B : NSObject {
    public func getACount(a:A) {     // error : use undeclare type : A
        println(a.count)
    }
    public override init() {

    }
 }

why it cannot output this error?

Answer 1

You need to set the type of var count to Int in class A .

Is this what you want?

public class A : NSObject {
    public var count: Int
    public override init() {
        count = 10
        super.init()
    }
}

public class B : NSObject {
    public func getACount(a:A) {     // error : use undeclare type : A
        println(a.count)
    }
}


var b = B()
var a = A()
var aa = A()
aa.count = 123


b.getACount(a) // prints 10
b.getACount(aa) // prints 123

Also if you override an init() make sure you call super.init() to make sure the parent class initialises.