Inno Setup-卸载时不显示进度栏 [英] Inno Setup - Progress bar doesn't show when uninstall

问题描述

我正在使用Inno Setup创建自己的安装程序.当用户卸载应用程序时，我想删除一些文件夹.

I'm using Inno Setup to create my own installer. When user uninstall app I want delete some folder.

因此，我使用CurUninstallStepChanged事件删除文件夹并以npbstMarquee样式显示进度栏"(基于 Inno Setup:如何处理[UninstallDelete]部分上的进度栏?).

So I use CurUninstallStepChanged event to delete folder and show "progress bar" with npbstMarquee style (based on Inno Setup: How to handle progress bar on [UninstallDelete] section?).

这是代码:

procedure DeleteFolder();
var
  FindRec: TFindRec;
  fullPath: string;
  tmpMsg: string;
  StatusText: string;
  deletePath: string;
begin
  { find all and delete }
  UninstallProgressForm.ProgressBar.Style := npbstMarquee;       
  StatusText := UninstallProgressForm.StatusLabel.Caption;
  UninstallProgressForm.StatusLabel.WordWrap := True;
  UninstallProgressForm.StatusLabel.AutoSize := True;
  fullPath := 'C:\ProgramData\TestPath';
  if FindFirst(ExpandConstant(fullPath + '\*'), FindRec) then 
  try
    repeat
      if (FindRec.Attributes and FILE_ATTRIBUTE_DIRECTORY <> 0) and 
         (FindRec.Name <> '.') and (FindRec.Name <> '..') then begin
            deletePath := AddBackslash(fullPath) + FindRec.Name;
            tmpMsg := 'Deleting...' + #13#10 + deletePath;
            UninstallProgressForm.StatusLabel.Caption := tmpMsg;
            DelTree(deletePath, True, True, True);
        end;
    until
      not FindNext(FindRec);
  finally
    UninstallProgressForm.StatusLabel.Caption := StatusText;
    FindClose(FindRec);
  end;
  UninstallProgressForm.ProgressBar.Style := npbstNormal;
end;

{ Uninstall event }
procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
begin
   case CurUninstallStep of
    usUninstall:
     begin
       DeleteFolder();
    end;
  end;
end;

如果我使用debug每行，我可以看到进度条正在运行.但是当我使用unins000.exe时，只有Caption可以显示，进度条没有显示.
我该如何解决?

If I using debug each line, I can see progress bar running. But when I using unins000.exe then only Caption can show, progress bar is not showing.
How can I fix it?

推荐答案

您必须抽取消息队列以显示/设置进度条的动画.
Inno设置:如何修改长时间运行的脚本以使其不会冻结GUI?

You have to pump the message queue to display/animate the progress bar.
Inno Setup: How to modify long running script so it will not freeze GUI?

特别地，您可以从以下位置使用AppProcessMessage功能:
通过侦听端口(Inno Setup)在局域网上发现我的SQL Server

Particularly, you can use the AppProcessMessage function from:
My SQL server discovery on LAN by listening port (Inno Setup)

尽管使用DelTree，对AppProcessMessage的调用之间的间隔将太大，无法平滑地为进度栏设置动画.您必须显式实现递归删除，以允许足够频繁地泵送队列.

Though with use of DelTree, the interval between calls to AppProcessMessage will be too big to animate the progress bar smoothly. You would have to implement a recursive delete explicitly to allow pumping the queue frequently enough.

这篇关于Inno Setup-卸载时不显示进度栏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！