1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129
|
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TClasseB = class(Tobject)
constructor Create;
destructor Destroy;override;
public
Param1 : Single;
Param2 : Integer;
end;
type
TClasseA = class(Tobject)
constructor Create;
destructor Destroy;override;
private
FClasseB : TClasseB;
Param1 : Single;
Param2 : Integer;
published
function test(ParamArray : array of single): boolean;
end;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
ClasseA : TClasseA;
public
{ Déclarations publiques }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
ClasseA := TClasseA.Create;
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
ClasseA.Free;
end;
procedure TForm1.Button1Click(Sender: TObject);
var
proc : function (ParamArray : array of single): boolean of object;
params : array of single;
begin
@proc := ClasseA.MethodAddress('test');
if @proc <> nil then begin
SetLength(params,2);
params[0] := 1000;
params[1] := 2000;
proc(params);
end else begin
ShowMessage('Methode non trouvée');
end;
end;
{ TClasseA }
constructor TClasseA.Create;
begin
FClasseB := TClasseB.Create;
Param1 := 0;
Param2 := 0;
end;
destructor TClasseA.Destroy;
begin
inherited Destroy;
end;
function TClasseA.test(ParamArray: array of single): boolean;
var
Param1 : single;
param2 : integer;
begin
if Assigned(FClasseB) then begin
Param1 := ParamArray[0];
Param2 := Round(ParamArray[1]);
FClasseB.Param1 := ParamArray[0]; // <- acces violation si appelée depuis button1click;
FClasseB.Param2 := Round(ParamArray[1]);
test := True;
end else begin
test := False;
end;
end;
{ TClasseB }
constructor TClasseB.Create;
begin
Param1 := 0;
Param2 := 0;
end;
destructor TClasseB.Destroy;
begin
inherited Destroy;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
ClasseA.test([1000,2000]);
end;
end. |
Partager