在willSet中的懶惰初始化問題

Question

我想創建可選的數組，但我想只在將元素添加到之前進行初始化。

所以我寫了：

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

但我得到這個錯誤：如果你想要一個懶惰吧，那麼你應該做這樣

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] = []