Form1调用Unit2类中函数

unit Unit2;

interface
uses FMX.Dialogs, FMX.StdCtrls;

type
TBClick = class
private

public
procedure BClick(Sender: TObject);

end;

implementation

{ BClick }

procedure TBClick.BClick(Sender: TObject);
begin
ShowMessage('hello');
end;

end.

unit Unit1;

interface

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

type
TForm2 = class(TForm)
Button1: TButton;
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form2: TForm2;

implementation
uses
Unit3;

{$R *.fmx}

{ TForm2 }

procedure TForm2.FormCreate(Sender: TObject);
var
bclick: TBClick;
begin
Button1.OnClick := bclick.BClick;　　
Button1.OnClick(Sender);　　　　　　　　// hello
end;

end.