下面的脚本将在启动安装程序时,如果目标系统上已经安装了应用程序,则创建以下选项表单:
当用户点击“修复”按钮时,通常会启动设置。当用户单击“卸载”按钮时,先前安装的应用程序将被卸载。当用户关闭该表单时,不会发生任何事情。
以下是脚本(不要忘记为您的脚本指定理想的、某些唯一值的
AppId
设置指令):
[Setup]
AppName=My Program
AppVersion=1.5
AppId=1C9FAC66-219F-445B-8863-20DEAF8BB5CC
DefaultDirName=\My Program
OutputDir=userdocs:Inno Setup Examples Output
[CustomMessages]
OptionsFormCaption=Setup options...
RepairButtonCaption=Repair
UninstallButtonCaption=Uninstall
[Code]
const
mrRepair = 100;
mrUninstall = 101;
function ShowOptionsForm: TModalResult;
var
OptionsForm: TSetupForm;
RepairButton: TNewButton;
UninstallButton: TNewButton;
begin
Result := mrNone;
OptionsForm := CreateCustomForm;
try
OptionsForm.Width := 220;
OptionsForm.Caption := ExpandConstant('{cm:OptionsFormCaption}');
OptionsForm.Position := poScreenCenter;
RepairButton := TNewButton.Create(OptionsForm);
RepairButton.Parent := OptionsForm;
RepairButton.Left := 8;
RepairButton.Top := 8;
RepairButton.Width := OptionsForm.ClientWidth - 16;
RepairButton.Caption := ExpandConstant('{cm:RepairButtonCaption}');
RepairButton.ModalResult := mrRepair;
UninstallButton := TNewButton.Create(OptionsForm);
UninstallButton.Parent := OptionsForm;
UninstallButton.Left := 8;
UninstallButton.Top := RepairButton.Top + RepairButton.Height + 8;
UninstallButton.Width := OptionsForm.ClientWidth - 16;
UninstallButton.Caption := ExpandConstant('{cm:UninstallButtonCaption}');
UninstallButton.ModalResult := mrUninstall;
OptionsForm.ClientHeight := RepairButton.Height + UninstallButton.Height + 24;
Result := OptionsForm.ShowModal;
finally
OptionsForm.Free;
end;
end;
function GetUninstallerPath: string;
var
RegKey: string;
begin
Result := '';
RegKey := Format('%s\%s_is1', ['Software\Microsoft\Windows\CurrentVersion\Uninstall',
'{#emit SetupSetting("AppId")}']);
if not RegQueryStringValue(HKEY_LOCAL_MACHINE, RegKey, 'UninstallString', Result) then
RegQueryStringValue(HKEY_CURRENT_USER, RegKey, 'UninstallString', Result);
end;
function InitializeSetup: Boolean;
var
UninstPath: string;
ResultCode: Integer;
begin
Result := True;
UninstPath := RemoveQuotes(GetUninstallerPath);
if UninstPath <> '' then
begin
case ShowOptionsForm of
mrRepair: Result := True;
mrUninstall:
begin
Result := False;
if not Exec(UninstPath, '', '', SW_SHOW, ewNoWait, ResultCode) then
MsgBox(FmtMessage(SetupMessage(msgUninstallOpenError), [UninstPath]), mbError, MB_OK);
end;
else
Result := False;
end;
end;
end;