我有一个Objective-C方法接受id类型的参数,我想传递一个
Swift结构.
ObjcClass.m文件：
- @implementation ObjcClass
- + (void)addListener:(id)listener {
- // Do something with listener
- }
DemoStruct.swift文件：
- struct DemoStruct {
- func registerAsListener() {
- ObjcClass.addListener(self) // Can't find a way to do this
- }
- }
我得到的编译错误消息：
Type ‘DemoStruct’ does not conform to protocol ‘AnyObject’
所以我的问题是,如何使Objective-C方法接受Any而不是AnyObject并且有这样的事情？
你不能这样做.
从Objective-C无法访问Swift结构.这在Apple的“使用Swift With Cocoa和Objective-C”一书中有所说明：
You’ll have access to anything within a class or protocol that’s marked with the @objc attribute as long as it’s compatible with Objective-C. This excludes Swift-only features such as those listed here:
- Generics
- Tuples
- Enumerations defined in Swift
- Structures defined in Swift
- Top-level functions defined in Swift
- Global variables defined in Swift
- Typealiases defined in Swift
- Swift-style variadics
- Nested types
- Curried functions
摘录自：Apple Inc.“将Swift与Cocoa和Objective-C结合使用.”iBooks. https://itun.es/gb/1u3-0.l
