Flutter学习笔记—继承与多继承

类的继承

class Father{
    myFunction(){
        //do something
    }
}

class Son extends Father{
    @override
    myFunction(){
        super.myFunction();
        //do something
    }
}

多继承

class Father1{
    a(){
        print('this is a func');
    }

    common(){
        print('common Father1');
    }
}

class Father2{
    b(){
        print('this is b func');
    }

    common(){
        print('common Father2');
    }
}

class Father3{
    c(){
        print('this is c func');
    }

    common(){
        print(common Father3);
    }
}

//定义子类
class Son extends Father1 with Father2,Father3{
    
}

//以上继承写法中，也可以直接使用with
class Son with Father1,Father2,Father3{

}

void main(){
    var obj = new Son();
    obj.common();
    obj.a();
    obj.b();
    obj.c();
}