检查 xcode 中的指定初始值设定项 [英] Check designated initializer in xcode

问题描述

有什么方法可以找出Xcode中超类中指定的初始化程序?
我输入 super().init.. 然后，Xcode 显示超类的所有初始值设定项.我想知道是否有任何标志或符号可以指出哪个是指定的?

Is there any way to find out which initializer is the designated one in super class in Xcode?
I type super().init.. then, Xcode shows all initializers of superclass. I want to know is there any sign or symbol to point out which is the designated one?

也是一个简单的问题.子类中的指定构造器(DI)只能调用超类中的便利构造器(CI)，因为超类中的 CI 最终会调用超类中的 DI.如果我错了，请纠正我，谢谢.

Also a quick question. A designated initializer(DI) in subclass is allowed to only call a convenience initializer(CI) in superclass since the CI in superclass will eventually call the DI in superclass. Correct me if I'm wrong, thanks.

推荐答案

在 Swift 中，任何没有用关键字convenience"标记的初始化器都是指定的初始化器.

In Swift, any initializer not marked with the keyword "convenience" is a designated initializer.

根据Swift 编程语言.他们不能调用便利初始化程序.

And designated initializers are required to call a designated initializer in their immediate superclass, per The Swift Programming Language. They cannot call a convenience initializer.

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