爲打字稿

Question

我採用了棱角分明4.在我的代碼，我想創建嵌套泛型類的實例如下面的代碼開發應用程序中創建嵌套泛型實例：

export class Page<T> 
{ 
    constructor(c: { new(): T; }){ 
     this.FilterData = new c(); 
    } 
    TotalItems: number; 
    PageSize: number; 
    CurrentPage: number; 
    TotalPage: number; 
    FilterData: T; 
} 

export class Filter<T> 
{ 
    constructor(c: { new(): T; }) 
    { 
     this.AdvanceData = new c(); 
    } 
    AdvanceData: T 
    IsAdvance: boolean; 
    OrderMeThod: string; 
    OrderBy: string; 
    KeyWord: string; 
} 
export class Client 
{ 
Name:string; 
} 

而且我不知道我該如何初始化Page<Filter<Client>>的對象，其中Filter和Client是在構造函數中初始化的。我試過了，例如：new Page<Filter<Client>>();但它沒有工作。 請幫我解決這個問題。謝謝

Answer 1

而不是調用new，讓你正在傳遞的函數返回新的實例。 例如：

interface Generator<T> { 
    generate(): T 
} 

export class Page<T> { 
    constructor(c: Generator<T>) { 
     this.FilterData = c.generate(); 
    } 

    TotalItems: number; 
    PageSize: number; 
    CurrentPage: number; 
    TotalPage: number; 
    FilterData: T; 
} 

export class Filter<T> { 
    constructor(c: Generator<T>) { 
     this.AdvanceData = c.generate(); 
    } 

    AdvanceData: T; 
    IsAdvance: boolean; 
    OrderMeThod: string; 
    OrderBy: string; 
    KeyWord: string; 
} 

export class Client { 
    Name: string; 
} 

const clientGenerator: Generator<Client> = { 
    generate:() => new Client() 
}; 

const filterGenerator: Generator<Filter<Client>> = { 
    generate:() => new Filter(clientGenerator) 
}; 

const pageOfFilterOfClient: Page<Filter<Client>> = new Page(filterGenerator);