swift 3 - 方法不覆盖其超类中的任何方法

Question

我正在尝试覆盖 Swift 子类中的 myMethod，但不断出现以下错误：

method does not override any methods from its superclass

ViewControllerA.h

@interface ViewControllerA : UIViewController 
   // define a bunch of properties and methods
   // note: myMethod is NOT included in this interface
@end

ViewControllerA.m

@implementation ViewControllerA
    (void)myMethod:(ParameterClass *)parameter {
        ...
    }
@end

ViewControllerB.h

@interface ViewControllerB : ViewControllerA
   // define a bunch of properties
@end

ViewControllerB.m

@implementation ViewControllerB
    // define a bunch of methods
@end

ViewControllerC.swift

class ViewControllerC: ViewControllerB{
    override func myMethod(parameter: ParameterClass) { // ERROR is here
        NSLog("Calling overrided myMethod")
    }
}

有人能告诉我我错过了什么吗？

Answer 1

Swift 只会看到您在桥接 header 中包含的 header 文件 – 因此如果您不在 @interface 中包含您的方法声明 ViewControllerA，Swift 不可能知道它的任何信息。

所以，只需将其放入您的 @interface:

@interface ViewControllerA : UIViewController

// By default it will be imported into Swift as myMethod(_:). Adding NS_SWIFT_NAME
// allows you to change that to whatever you want.
-(void)myMethod:(ParameterClass *)parameter NS_SWIFT_NAME(myMethod(parameter:));

@end

swift 3 - 方法不覆盖其超类中的任何方法

swift 3 - method does not override any methods from its superclass

inheritance

overriding

subclass

objective-c

swift