我想知道NSObject和struct之间的区别.以下示例将解释这两种情况
指导
struct UserDetails{
var userName:String
var userID:String
var userAge:String
func userDescription()->String{
return "name " + userName + "age " + userAge
}
}
在NSObject类中
class UserDetails: NSObject {
var userName:String?
var userID:String?
var userAge:String?
func userDescription()->String{
return "name " + userName! + "age " + userAge!
}
}
你能告诉我在哪里必须使用NSObject类,我必须使用struct ..？
