Question

我试图在dll中制作一个FMX表格，大约17个小时后（尝试不同的approches）我让它工作，除了我试图卸载dll 之外的异常。我不知道如何让它发挥作用，也许有人可以帮助我并指出我做错了什么？

旁注：我不能在我的VCL应用程序中有一个FMX表格，因为AA绘图，我只需要在我的文本上绘制画布，并在VCL应用程序上有一个FMX表格，我没有得到文字上的清晰:(即时通讯尝试制作某种OSD / HUD。

项目显示我的问题：

exe unit1.pas

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses
  unitLoadDLL, Winapi.GDIPOBJ;

procedure TForm1.Button1Click(Sender: TObject);
begin
  showme();
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  closeme();
end;

end.

exe unitLoadDll.pas

unit unitLoadDLL;

interface

uses Windows, Dialogs;

type
  TShowme = procedure();
  TCloseme = procedure();

var
  showme : TShowme = nil;
  closeme : TCloseme = nil;
  DllHandle : THandle;

implementation

initialization

  if DllHandle = 0 then begin
    DllHandle := LoadLibrary('C:\Users\Ja\Desktop\dupa\dll\Win32\Debug\Project1.dll');
    if DllHandle > 0 then begin
      @showme := GetProcAddress(DllHandle,'showme');
      @closeme := GetProcAddress(DllHandle,'closeme');
    end
    else begin
      MessageDlg('Select Image functionality is not available', mtInformation, [mbOK], 0);
    end;
  end;

finalization
  if DLLHandle <> 0 then
    FreeLibrary(DLLHandle);
end.

dll project1.dpr

library Project1;


uses
  FMX.Forms,
  System.SysUtils,
  System.Classes,
  Unit1 in 'Unit1.pas' {Form1};

{$R *.res}

procedure showme(); stdcall export;
begin
  TForm1.showme;
end;

procedure closeme(); stdcall export;
begin
  TForm1.closeme;
end;

exports
  showme, closeme;

begin
end.

dll unit1.pas

unit Unit1;

interface

uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Dialogs;

type
  TForm1 = class(TForm)
    Label1: TLabel;
  private
    { Private declarations }
  public
    class procedure showme();
    class procedure closeme();
  end;

var
  Form1: TForm1;

implementation

{$R *.fmx}

class procedure TForm1.showme();
begin
  Form1 := TForm1.Create(Application);
  Form1.Show;
end;

class procedure TForm1.closeme();
begin
  Form1.Free;
end;

end.

编辑（FIX）：

所有答案都有用，但我所做的是，在dll卸载之前GDI +已关闭......这似乎是问题所在。

new unitLoadDll.pas

unit unitLoadDLL;

interface

uses Windows, Dialogs;

type
  TShowme = procedure();
  TCloseme = procedure();

var
  showme : TShowme = nil;
  closeme : TCloseme = nil;
  DllHandle : THandle;

  function LoadLib : Boolean;
  procedure UnloadLib;

implementation

function LoadLib : Boolean;
begin
  if DllHandle = 0 then begin
    DllHandle := LoadLibrary('C:\Users\Ja\Desktop\dupa\dll\Win32\Debug\Project1.dll');
    if DllHandle > 0 then begin
      @showme := GetProcAddress(DllHandle,'showme');
      @closeme := GetProcAddress(DllHandle,'closeme');
    end
    else begin
      MessageDlg('Select Image functionality is not available', mtInformation, [mbOK], 0);
    end;
  end;
  Result := DllHandle <> 0;
end;

procedure UnloadLib;
begin
  if DLLHandle <> 0 then begin
    FreeLibrary(DLLHandle);
    DllHandle := 0;
  end;
end;

initialization
  LoadLib;

finalization
  UnloadLib;
end.

new unit1.pas

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Winapi.GDIPOBJ;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses
  unitLoadDLL;

procedure TForm1.Button1Click(Sender: TObject);
begin
  showme();
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  closeme();
end;

end.

在unit1.pas中我将Winapi.GDIPOBJ在接口指令之后移动到“使用”，并且它有效...

谢谢大家的回答！再见！很快......

Answer 1

如果你双方都进口sharemem会有帮助吗？

您没有使用软件包，因此双方可能都有自己的实例所有RTL状态，以及VMT表（尽管这只是某些IS和AS案例的问题）。内存管理器是RTL状态： - ）

DLL中的FMX表单（firemonkey / delphi）

1 个答案: