procedure TForm1.Button1Click(Sender: TObject);
var
I: Integer;
begin
for I := 0 to ComponentCount - 1 do
if Components[I] is TEdit then
TEdit(Components[I]).Text := '试试看';
end;
var
I: Integer;
begin
for I := 0 to ComponentCount - 1 do
if Components[I] is TEdit then
TEdit(Components[I]).Text := '试试看';
end;
var
I: Integer;
vComponent: TComponent;
begin
for I := 1 to 10 do begin
vComponent := FindComponent('Edit' + IntToStr(I));
if Assigned(vComponent) then
TEdit(vComponent).Text := '再试试看';
end;
end;
//System.Assigned()判断对象是否分配资源
//Classes.TComponent.FindComponent()根据名称查找元件