Delphi 接口(1)

雨点打透心脏的1/2处 2021-10-25 13:22 253阅读 0赞

![1494453-20181027180754573-474378196.gif][]

代码如下:

unit Unit2;
    
    interface
    
    uses
      Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes,
      Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Unit1, Vcl.StdCtrls;
    
    type
      TForm2 = class(TForm)
        edt_Name: TEdit;
        edt_language: TEdit;
        edt_SkinColor: TEdit;
        lbl1: TLabel;
        lbl2: TLabel;
        lbl3: TLabel;
        btn1: TButton;
        btn2: TButton;
        btn3: TButton;
        btn4: TButton;
        procedure btn1Click(Sender: TObject);
        procedure btn2Click(Sender: TObject);
        procedure btn3Click(Sender: TObject);
        procedure btn4Click(Sender: TObject);
      private
        {
          Private declarations }
        procedure SayHello(AMan: TMan; G: IGreetable);
      public
        {
          Public declarations }
      end;
    
    var
      Form2: TForm2;
    
    implementation
    
    {
         $R *.dfm}
    
    {
          TForm2 }
    
    procedure TForm2.btn1Click(Sender: TObject);
    var
      G: IGreetable;
      AMan: TMan;
    begin
      AMan:=TChinese.Create;
      G:=TChinese.Create;
      SayHello(AMan,g);
    end;
    
    procedure TForm2.btn2Click(Sender: TObject);
    var
      G: IGreetable;
      AMan: TAmerican;
    begin
      AMan := TAmerican.Create;
      G := TAmerican.Create;
      SayHello(AMan,G);
    end;
    
    procedure TForm2.btn3Click(Sender: TObject);
    var
      G: IGreetable;
      AMan: TFrench;
    begin
      AMan := TFrench.Create;
      G := TFrench.Create;
      SayHello(AMan,G);
    end;
    
    procedure TForm2.btn4Click(Sender: TObject);
    var
      G: IGreetable;
      AMan: TKorean;
    begin
      AMan := TKorean.Create;
      G := TKorean.Create;
      SayHello(AMan,G);
    end;
    
    procedure TForm2.SayHello(AMan: TMan; G: IGreetable);
    begin
      edt_Name.Text := AMan.Name;
      edt_language.Text := AMan.Language;
      edt_SkinColor.Text := AMan.SkinColor;
    end;
    
    end.

Unit单元代码如下:

unit Unit1;
    
    interface
    
    uses
      Winapi.Windows, Messages, System.StrUtils, System.Variants, System.Classes,
      Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;
    
    type
      IGreetable = interface
        ['{00000000-0000-0000-C000-000000000046}']
        //function SayHello: string;
        //function Eat:string;
      end;
    
      TMan = class(TInterfacedObject, IGreetable)
        Language:string;
        Married:Boolean;
        Name:string;
        SkinColor:string;
      private
        function _Release: integer;
        public
          constructor Create;virtual;
      end;
    
      TChinese = class(TMan,IGreetable )
      public
        constructor create;override;
      private
        function SayHello:string;
      end;
    
      TAmerican = class(TMan  ,IGreetable)
      public
        constructor create;override;
      private
        function SayHello:string;
      end;
    
      TFrench = class(TMan  ,IGreetable)
      public
        constructor create;override;
      private
        function SayHello:string;
      end;
    
      TKorean = class(TMan,IGreetable)
      public
        constructor create;override;
      private
        function SayHello:string;
      end;
    
    implementation
    
    constructor TChinese.create;
    begin
      inherited;
    
    end;
    
    function TChinese.SayHello: string;
    begin
      Result := 'chinese.bmp';
    end;
    
    {
          TMan }
    
    constructor TMan.Create;
    begin
      name := '張三';
      language := '中文';
      SkinColor := '黃色';
    end;
    
    function TMan._Release: integer;
    begin
    
    end;
    
    {
          TAmerican }
    
    constructor TAmerican.create;
    begin
      name := 'Lee';
      Language := 'English';
      SkinColor := 'black';
    end;
    
    function TAmerican.SayHello: string;
    begin
      Result := 'americam.bmp';
    end;
    
    {
          TFrench }
    
    constructor TFrench.create;
    begin
      Name := 'SuFei';
      Language := '法文';
      SkinColor := 'white';
    end;
    
    function TFrench.SayHello: string;
    begin
      Result := 'french.bmp';
    end;
    
    {
          TKorean }
    
    constructor TKorean.create;
    begin
      Name := '韩国';
      Language := '韩文';
      SkinColor := 'yellow';
    end;
    
    function TKorean.SayHello: string;
    begin
      Result := 'korean.bmp';
    end;
    
    end.

窗体代码:

object Form2: TForm2
      Left = 0
      Top = 0
      Caption = 'Form2'
      ClientHeight = 291
      ClientWidth = 306
      Color = clBtnFace
      Font.Charset = DEFAULT_CHARSET
      Font.Color = clWindowText
      Font.Height = -13
      Font.Name = 'Tahoma'
      Font.Style = []
      OldCreateOrder = False
      PixelsPerInch = 120
      TextHeight = 16
      object lbl1: TLabel
        Left = 48
        Top = 8
        Width = 38
        Height = 16
        Caption = 'Name:'
      end
      object lbl2: TLabel
        Left = 48
        Top = 46
        Width = 60
        Height = 16
        Caption = 'Language:'
      end
      object lbl3: TLabel
        Left = 49
        Top = 80
        Width = 59
        Height = 16
        Caption = 'SkinColor:'
      end
      object edt_Name: TEdit
        Left = 114
        Top = 8
        Width = 121
        Height = 24
        TabOrder = 0
        Text = 'edt_Name'
      end
      object edt_language: TEdit
        Left = 114
        Top = 38
        Width = 121
        Height = 24
        TabOrder = 1
        Text = 'edt_language'
      end
      object edt_SkinColor: TEdit
        Left = 114
        Top = 77
        Width = 121
        Height = 24
        TabOrder = 2
        Text = 'edt_SkinColor'
      end
      object btn1: TButton
        Left = 114
        Top = 128
        Width = 121
        Height = 25
        Caption = 'chinese'
        TabOrder = 3
        OnClick = btn1Click
      end
      object btn2: TButton
        Left = 114
        Top = 159
        Width = 121
        Height = 26
        Caption = 'American'
        TabOrder = 4
        OnClick = btn2Click
      end
      object btn3: TButton
        Left = 114
        Top = 191
        Width = 121
        Height = 25
        Caption = 'French'
        TabOrder = 5
        OnClick = btn3Click
      end
      object btn4: TButton
        Left = 114
        Top = 222
        Width = 121
        Height = 25
        Caption = 'Korean'
        TabOrder = 6
        OnClick = btn4Click
      end
    end

转载于:https://www.cnblogs.com/YiShen/p/9862601.html

[1494453-20181027180754573-474378196.gif]: /images/20211025/49fe951e713a48f485e00f379541cc25.png