Javascript 在typescript 2中创建对象的实例

如何在TypeScript中创建新实例。显然，我没有匹配构造函数，但我看不出有什么问题

export class User implements IUser {
    public id: number;
    public username: string;
    public firstname: string;
    public lastname: string;
    public birthday: string;
    public email: string;

    public constructor(iUser: IUser)
    {
        this.id = iUser.id;
        this.username = iUser.username;
        this.firstname = iUser.firstname;
        this.lastname = iUser.lastname;
        this.birthday = iUser.birthday;
        this.email = iUser.email;
    }
}

    interface IUser {
        id?: number;
        username: string;
        firstname: string;
        lastname: string;
        birthday: string;
        email: string;
    }

和扩展用户的学生类

export class Student extends User implements IStudent, IUser {
    public indeks: string;
    public studyProgram: StudyProgram;


    public constructor(iUser: IUser, iStudent: IStudent)
    {
        super(iUser);
        this.indeks = iStudent.indeks;
        this.studyProgram = iStudent.studyProgram;
    }
}

    interface IStudent {
        indeks: string;
        studyProgram: StudyProgram;
    }

所以，当我尝试创建student的新实例时，我得到了这个错误

这是

StudyProgram

class

export class StudyProgram implements StudyProgramInterface {
        public id: number;
        public name: string;
        public duration: number;
        public courseType: string;
        public studentList: Array<Student>;

    public constructor(studyProgramCfg: StudyProgramInterface) {
        this.id = studyProgramCfg.id;
        this.name = studyProgramCfg.name;
        this.duration = studyProgramCfg.duration;
        this.courseType = studyProgramCfg.courseType;
    }
}

    interface StudyProgramInterface {
        id?: number;
        name: string;
        duration: number;
        courseType: string;
    }

导出类StudyProgram实现StudyProgram接口{
公众id：号码；
公共名称：字符串；
公众持续时间：数字；
公共课程类型：字符串；
公共学生名单：数组；
公共构造函数（studyProgramCfg:studyprogramiinterface）{
this.id=studyProgramCfg.id；
this.name=studyProgramCfg.name；
this.duration=studyProgramCfg.duration；
this.courseType=studyProgramCfg.courseType；
}
}
接口研究程序接口{
id？：编号；
名称：字符串；
持续时间：数字；
课程类型：字符串；
}

学生类构造函数需要两个对象（一个实现IStudent，另一个实现IUser），您只传递一个。我认为您正在寻找的构造器是：

public constructor(student: IUser & IStudent) {
    super(student);
    this.indeks = student.indeks;
    this.studyProgram = student.studyProgram;
}

您可以在此处找到有关交叉点类型的更多信息：

public constructor(student: IUser & IStudent) {
    super(student);
    this.indeks = student.indeks;
    this.studyProgram = student.studyProgram;
}