试图在自己的willSet中存储到属性''

Question

我在编辑器中得到了一个奇怪的警告,我需要帮助理解它想要的东西

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

---

var someProperty:SomeClass! {
    willSet { someProperty?.someFunction() } // Get warning: Attempting to store to property 'someProperty' within its own willSet, which is about to be overwritten by the new value
    didSet { ... }
}

当我运行它时它正在执行我想要的操作,在控制台中没有崩溃或警告,所以我认为这只是一个误报.所以我能以任何方式压制它,因为它烦人吗？:(

Answer 1

这是一个已知的错误,在Apple开发者论坛中报告:https://devforums.apple.com/message/1065306#1065306,其中添加了一个明确的解决方法self:

    willSet {
        self.someProperty?.someFunction()
    }

更新:我无法再重现Xcode 7.3.1或Xcode 8的问题,所以现在似乎已经修复了.