Delphi 使用 RTTI 动态通过名称调用函数和设置控件属性值

// 设置控件的属性名
uses TypInfo, JclAnsiStrings;

function GetObject(obj:TObject; path:String): TObject;
var objName:String;
begin
  Result := obj;

  while System.Length(path) > 0 do begin
    objName := JclAnsiStrings.StrToken(path, '.');
    if obj is TComponent then begin
      Result := TComponent(Result).FindComponent(objName);
    end else begin
      Result := TypInfo.GetObjectProp(Result, objName);
    end;
  end;
end;

procedure SetPropValue(obj:TObject; path:String; value:Variant);
var tk:TTypeKind;
    i:Integer;
    propName:String;
begin
  i := JclAnsiStrings.StrLastPos('.', path);
  if i > 0 then begin
    obj:= GetObject(obj, JclAnsiStrings.StrLeft(path, i-1));
    propName:= JclAnsiStrings.StrRestOf(path, i+1);
  end else begin
    propName := path;
  end;
  TypInfo.SetPropValue(obj, propName, value);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  SetPropValue(Self, 'button1.caption', 'test');
  SetPropValue(Self, 'button1.width', '200');
  SetPropValue(Self, 'label1.Visible', false);
end;

// 动态调用函数/过程

type
  TMyProcedure = procedure of object;
  TMyMethod =  function(x, y: Integer): integer of object;

function GetMethod(obj: TObject; MethodName: string): TMethod;
var Rounte: TMethod;
begin
  Result := nil;
  Rounte.Data := Pointer(obj);
  Rounte.Code := obj.MethodAddress(MethodName);
  if not System.Assigned(Rounte.Code) then Exit;
  Result := Rounte;
end;

procedure Form1.Button1Click(Sender:TObject);
var m1: TMyProcedure;
    m2: TMyMethod;
    i:Integer;
begin
  m1 := TMyProcedure(GetMethod(Self, 'show'));
  m1(); // execute
 
  m2 := TMyMethod(GetMethod(), 'Add');
  i := m2(1,2); // execute
end;