在willSet中的懒惰初始化问题

Question

我想创建可选的数组，但我想只在将元素添加到之前进行初始化。

所以我写了：

var names: [String]? { 
     willSet { 
      if names == nil { 
       names = [] 
      } 
     } 
    } 

但我得到这个错误：如果你想要一个懒惰吧，那么你应该做这样

Attempting to store to property 'names' within its own willSet, which is about to be overwritten by the new value

Answer 1

...

lazy var names: [String] = []