[英]Define custom class for object Swift
例如我有一个BaseObject
类:
class BaseObject: NSObject {
let id:UInt64
}
和经理类为此对象:
public class Manager: NSObject {
public var objs:[BaseObject] = []
public func addObj(obj:BaseObject) {
...
}
}
我想创建一个库,并允许开发人员设置自己的类,该类应该从Base Object
继承
例如:
class MyOwnBaseObject: BaseObject {
var ownProperty:Int = 0
}
var manager = Manager();
manager.objClass = MyOwnBaseObject
和manager.objs
现在应该返回: [MyOwnBaseObject]
和manager.addObj()
应该与MyOwnBaseObject
一起MyOwnBaseObject
这可能吗 ?
如果希望返回类型是您指定的子类,则可以使用泛型:
public class BaseObject: NSObject {
let id:UInt64 = 0
}
public class MyOwnBaseObject: BaseObject {
var ownProperty:Int = 0
}
public class Manager<T>: NSObject {
public var objs:[T] = []
public func addObj(obj:T) {
objs.append(obj)
}
}
var manager = Manager<BaseObject>()
let ob1 = BaseObject()
manager.addObj(obj: ob1)
let ob2 = BaseObject()
manager.addObj(obj: ob2)
var otherManager = Manager<MyOwnBaseObject>()
let ownOb1 = MyOwnBaseObject()
otherManager.addObj(obj: ownOb1)
let ownOb2 = MyOwnBaseObject()
otherManager.addObj(obj: ownOb2)
print(manager.objs) // objs is of type [BaseObject]
print(otherManager.objs) // objs is of type [MyOwnBaseObject]
如果没有泛型,你的代码将仍然工作,但你需要施放任何返回的对象objs
到自定义类(如MyOwnBaseObject
)访问任何特定的子类的属性。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.