ios - initWithNibName 不实现父类(super class) - Swift

Question

我正在尝试实现 Objective-C equiv。下面是使用 nib 调用 View Controller 时的情况。

Objective-C :

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        self.modalPresentationStyle = UIModalPresentationCustom;
        self.transitioningDelegate = self;
    }
    return self;
}

到目前为止，这是我在 swift 中的位置:

override init(nibName nibNameOrNil: String!, bundle nibBundleOrNil: NSBundle!) {
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)

    self.modalPresentationStyle = UIModalPresentationStyle.Custom
    self.transitioningDelegate = self
}

但是我一直收到这个错误:

Class "ViewController" does not implement its superclass's required members

我以为上面的初始化方法需要成员？

编辑 - 下面详细介绍: Class does not implement its superclass's required members

Answer 1

您必须实现基类所需的初始值设定项。在您的情况下，您应该将以下代码添加到您的 VC 类中:

required init(coder aDecoder: NSCoder!) {
    super.init(coder: aDecoder)
}

自 Beta 5 以来:

The required modifier is written before every subclass implementation of a required initializer. Required initializers can be satisfied by automatically inherited initializers.

备注:

required init(coder aDecoder: NSCoder!) { ... } 仅当您覆盖类中的至少一个 init 方法时才应添加。