0x00 Lesson
Although class inheritance
is very useful - and in fact large parts of Apple’s platforms require you to use it - sometimes you want to disallow
other developers from building their own class based on yours.
Swift gives us a final
keyword just for this purpose: when you declare a class as being final
, no other class can inherit from it. This means they can't
override your methods in order to change your behavior - they need to use your class the way it was written.
To make a class final just put the final
keyword before it, like this:
final class Dog {
var name: String
var breed: String
init(name: String, breed: String) {
self.name = name
self.breed = breed
}
}
0x01 我的小作品
欢迎体验我的作品之一:小编辑器-XCompiler
在线编辑器~小而巧
App Store
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