Swift 2.2：类型'（）'不符合协议'BooleanType'[重复](Swift 2.2: Type '()' does not c

Swift 2.2：类型'（）'不符合协议'BooleanType'[重复](Swift 2.2: Type '()' does not conform to protocol 'BooleanType' [duplicate])

这个问题在这里已有答案：

如何在Swift中编写initwithcoder代码？ 1个答案

我已经将Objective-C方法转换为Swift。 然后，进入Swift代码我得到了这个错误。 我没有把我做错了。

Objective-C代码

- (id)initWithCoder:(NSCoder *)aDecoder { if ((self = [super initWithCoder:aDecoder])) { [self loadChecklistItems]; } return self; }

Swift 2.2代码

convenience required init(coder aDecoder: NSCoder) { if (self.init(coder: aDecoder)) { // ERROR Here self.loadChecklistItems() } }

这是Swift代码的屏幕截图

请告诉我我做错了什么以及什么是正确的代码。

This question already has an answer here:

How to code initwithcoder in Swift? 1 answer

I have converted an Objective-C method into Swift. And then, into the Swift code i am getting this error. I have no tied what i have done wrong.

Objective-C Code

- (id)initWithCoder:(NSCoder *)aDecoder { if ((self = [super initWithCoder:aDecoder])) { [self loadChecklistItems]; } return self; }

Swift 2.2 code

convenience required init(coder aDecoder: NSCoder) { if (self.init(coder: aDecoder)) { // ERROR Here self.loadChecklistItems() } }

Here is the screenshot of Swift code

Please tell me what i have done wrong and what will be the right code.

最满意答案

只需直接调用初始化程序：

convenience required init(coder aDecoder: NSCoder) { self.init(coder: aDecoder) self.loadChecklistItems() }

但请注意，您的代码正在进行无限循环的调用。 你确定你不想打电话给super.init(...)吗？ 另外，我认为这不是一个方便的初始化器：

required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder) self.loadChecklistItems() }

Just call the initializer directly:

convenience required init(coder aDecoder: NSCoder) { self.init(coder: aDecoder) self.loadChecklistItems() }

However, note that your code is making an infinite cycle of calls. Are you sure you don't want to call super.init(...)? Also, I think that this is not a convenience initializer:

required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder) self.loadChecklistItems() }