如何强制 Inno Setup 使用来自自定义向导页面的信息动态设置安装文件夹?

How to force Inno Setup to set the installation folder dynamically with info from custom wizard page?

在 Inno Setup 中,我添加了一个自定义向导页面,用户可以在其中输入应动态添加到默认目录的后缀代码。

标准 DefaultDirNamec:\MyApp。 当用户在额外的自定义向导页面中添加后缀 01 时,DefaultDirName 应更改为 c:\MyApp01

如何做到这一点?显然我不能在 [Setup] 部分中使用代码,因为代码是在任何向导页面之前评估的。

离开 "suffix" 页面时,将后缀附加到安装路径。

另外你必须处理:

  • 用户返回后缀页面并更改后缀
  • re-installations(升级)-我的解决方案不允许更改 re-installations 的后缀(依赖于默认的 Inno Setup 行为,用户有一点机会更改安装路径)。
#define AppId "your-app-id"
#define SetupReg "Software\Microsoft\Windows\CurrentVersion\Uninstall\" + AppId + "_is1"
#define SetupAppPathReg "Inno Setup: App Path"

[Setup]
AppId={#AppId}
[Code]

function IsUpgrade: Boolean;
var S: string;
begin
  Result :=
    RegQueryStringValue(HKLM, '{#SetupReg}', '{#SetupAppPathReg}', S) or
    RegQueryStringValue(HKCU, '{#SetupReg}', '{#SetupAppPathReg}', S);
end;

var
  SuffixPage: TInputQueryWizardPage;

procedure InitializeWizard();
begin
  if not IsUpgrade then
  begin
    SuffixPage := CreateInputQueryPage(wpWelcome, 'Select suffix', '', '');
    SuffixPage.Add('Suffix', False);
  end;
end;

function NextButtonClick(CurPageID: Integer): Boolean;
begin
  { Add suffix to path, when leaving "suffix" page }
  if (SuffixPage <> nil) and (CurPageID = SuffixPage.ID) then
  begin
    WizardForm.DirEdit.Text := WizardForm.DirEdit.Text + SuffixPage.Values[0];
  end;
  Result := True;
end;

function BackButtonClick(CurPageID: Integer): Boolean;
var
  Suffix: string;
  P: Integer;
begin
  { When going back from "select dir" page }
  if (CurPageID = wpSelectDir) and (SuffixPage <> nil) then
  begin
    Suffix := SuffixPage.Values[0];
    P := Length(WizardForm.DirEdit.Text) - Length(Suffix) + 1;
    { ... and the path still contains the suffix [was not edited out by the user] ... }
    if Copy(WizardForm.DirEdit.Text, P, Length(Suffix)) = Suffix then
    begin
      { ... remove it form the path }
      WizardForm.DirEdit.Text := Copy(WizardForm.DirEdit.Text, 1, P - 1);
    end
      else
    { if the suffix was edited out by the user, clear suffix box }
    begin
      SuffixPage.Values[0] := '';
    end;
  end;
  Result := True;
end;