實現原理：

1.拖一個rectangle控件，Align屬性為TOP

2.拖一個Split控件，Align為Top

3.拖Rectangle，Align為Bottom

4.拖Split，Align為Bottom

5.左邊、右邊依次類推，

6.最後拖一個Rectangle，Align為Client，Stroke屬性中的Color為red。

具體代碼：

unit UnitCheckIPN;
 
interface
 
uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs, FMX.StdCtrls,
  FMX.Objects, FMX.Controls.Presentation;
 
 
type
  TForm2 = class(TForm)
    RT: TRectangle;  //RectTop
    ST: TSplitter;
    RL: TRectangle;
    SL: TSplitter;
    RB: TRectangle;
    SB: TSplitter;
    RR: TRectangle;
    SR: TSplitter;
    Rect: TRectangle;
    Image1: TImage;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    
 
procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
    procedure SetRect(s:String);
    function GetRC: String;                   // 獲取   獲取當前矩形的位置
    procedure SetRC(const Value: String);     //
 
 設置   給定x,y,w,h   矩形自動改變位置
  public
    { Public declarations }
    property RC: String read GetRC write SetRC;  // 將矩形的值設為屬性，讀為獲取rect的（x,y,width, height）   寫時為設置矩形的x,y,w,h
  end;
 
var
  Form2: TForm2;
 
implementation
 
{$R *.fmx}
 
procedure TForm2.Button1Click(Sender: TObject);
begin
  RC:=‘103,128,301,203‘;      //
end;
 
procedure TForm2.Button2Click(Sender: TObject);
begin
  ShowMessage(RC);            //
end;
 
procedure TForm2.Button3Click(Sender: TObject);
begin
  RC:=‘103,128,394,203‘;
end;
 
function TForm2.GetRC: String;
var
  x,y,w,h : Single;
begin
  result:=‘‘;
  y:=RT.Height+ST.Height;
  h:=Image1.Height - RT.Height - ST.Height - RB.Height - SB.Height;
 
  x:=RL.Width+SL.Width;
  w:=Image1.Width-RL.Width-SL.Width-RR.Width-SR.Width;
 
  result:=x.ToString()+‘,‘+y.ToString()+‘,‘+w.ToString()+‘,‘+h.ToString();
end;
 
procedure TForm2.SetRC(const Value: String);
var
  ss: TStringList;
  x,y,w,h: Integer;
begin
  ss:=TStringList.Create;
  ss.CommaText:=Value;
  x:=ss[0].ToInteger();
  y:=ss[1].ToInteger();
  w:=ss[2].ToInteger();
  h:=ss[3].ToInteger();
  ss.Free;
 
  RT.Height:=y-ST.Height;
  RB.Height:=Image1.Height-(RT.Height + ST.Height + h + SB.Height);
 
  RL.Width:=x-SL.Width;
  RR.Width:=Image1.Width-(RL.Width+SL.Width+w+SR.Width);
end;
 
procedure TForm2.SetRect(s: String);
var
  ss: TStringList;
  x,y,w,h: Integer;
begin
  ss:=TStringList.Create;
  ss.CommaText:=s;
  x:=ss[0].ToInteger();
  y:=ss[1].ToInteger();
  w:=ss[2].ToInteger();
  h:=ss[3].ToInteger();
  ss.Free;
 
  RT.Height:=y-ST.Height;
  RB.Height:=Image1.Height-(RT.Height + ST.Height + h + SB.Height);
 
  RL.Width:=x-SL.Width;
  RR.Width:=Image1.Width-(RL.Width+SL.Width+w+SR.Width);
end;
 
end.

https://www.cnblogs.com/studypanp/p/4930471.html

XE 畫矩形實現拖拉改變大小（屬性）