如何在swift中使用AS来获取类类型

Question

我有一个数组,SomeClass其中包括各种其他类的超类.
该数组中包含所有这些随机类.
有没有办法使用开关(相对于else if let something = elm as? TheSubClassType)

在伪代码中:

for AObjectOfTypeSomeClass in MyBigArray{
  switch the_type_of(AObjectOfTypeSomeClass){
    case SubClass1:
        let O = AObjectOfTypeSomeClass as! SubClass1
    ...
    ...
    ...
  }
}

Answer 1

你很亲密

for objectOfSomeClass in MyBigArray {
    switch objectOfSomeClass {
    case let subClass as SubClass1:
        // Do what you want with subClass
    default:
        // Object isn't the subclass do something else
    }
}

这个网站有我发现的模式匹配的最佳纲要. http://appventure.me/2015/08/20/swift-pattern-matching-in-detail/