sil protocol demo

protocol-demo.swift

protocol ListDataProtocol {
    func testFunc()
}

class TestClass:ListDataProtocol {
    func testFunc() {
        print("ahaha")
    }
}

extension ListDataProtocol{
    func testFunc() {
        print("bhbhb")
    }
}

let obj:TestClass = TestClass()
obj.testFunc()

let obj2:ListDataProtocol = TestClass()
obj2.testFunc()