Objective c 对于swift类，使用class_addin方法捕获选择器

我有ObjC课程：

@interface SomeClass : NSObject

@property(nonatomic, retain) NSNumber *sample;

@end

及

和它的孩子：

@objcMembers
class SomeClass1: SomeClass {
    dynamic var temp = NSNumber(1)

    override init() {
        let setterHasMethod = SomeClass1.resolveInstanceMethod(#selector(setter: SomeClass1.temp))
        let getterHasMethod = SomeClass1.resolveInstanceMethod(#selector(getter: SomeClass1.temp))
        print("setterHasMethod: \(setterHasMethod)")
        print("getterHasMethod: \(getterHasMethod)")
    }
}

所以，当我执行这个

func doSome1() {
        let someInstance = SomeClass1()
        someInstance.temp = NSNumber(2)
        let res = someInstance.temp
        print("res: \(res)")
    }

不调用propertyIMP和setPropertyIMP

但是对于

示例

：

func doSome() {
        let someInstance = SomeClass1()
        someInstance.sample = NSNumber(2)
        let res = someInstance.sample
        print("res: \(res)")
    }

一切正常

---

可以为Swift属性调用

class\u addMethod

中使用的方法吗？

您必须使用

@NSManaged

而不是

dynamic

：

@objcMembers
class SomeClass1: SomeClass {
    @NSManaged var temp = NSNumber(1)

    override init() {
        let setterHasMethod = SomeClass1.resolveInstanceMethod(#selector(setter: SomeClass1.temp))
        let getterHasMethod = SomeClass1.resolveInstanceMethod(#selector(getter: SomeClass1.temp))
        print("setterHasMethod: \(setterHasMethod)")
        print("getterHasMethod: \(getterHasMethod)")
    }
}

---

不，这是

Objective-C

的唯一运行时功能，您可以尝试为属性添加

@objc

属性。@Cy-4AH您有任何证据吗？证据是您的代码不起作用？@Cy-4AH我找到了一个解决方案为什么不直接实现

didSet

？@Cy-4AH，因为我使用了库

@objcMembers
class SomeClass1: SomeClass {
    @NSManaged var temp = NSNumber(1)

    override init() {
        let setterHasMethod = SomeClass1.resolveInstanceMethod(#selector(setter: SomeClass1.temp))
        let getterHasMethod = SomeClass1.resolveInstanceMethod(#selector(getter: SomeClass1.temp))
        print("setterHasMethod: \(setterHasMethod)")
        print("getterHasMethod: \(getterHasMethod)")
    }
}