Inno Setup 安装包升级处理

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示例代码-UpdateSetup.iss

添加[Code]段

Inno Setup 要实现安装包升级检测，需要编写检测代码，其语法是Pascal【看的懂伪代码及C语言的，看起来不会太难】。

首先添加Code段基础代码，inno setup中代码首先会执行InitializeSetup()，所以我们会在此方法的基础上做升级检测。

[Code]
function InitializeSetup(): Boolean;
begin
    result := true;
end;

定义软件的id和version

安装包通过AppId和AppVersion来找到对应的应用信息。

#define appid "{F3234165-547C-4DE1-AF86-767178AF3FAC}"         
#define appversion "1.0.0.2"

[Setup]
AppName=HelloWorld      
AppId={{#appid}         
AppVersion={#appversion}

添加版本检测代码

注意检测代码添加至InitializeSetup函数之前

• 从注册表中获取已安装的版本
• 比较版本号，弹出升级提示

//旧版本检测，安装新版本
function GetNumber(var temp: String): Integer;
var
    part: String;
    pos1: Integer;
begin
    if Length(temp) = 0 then
    begin
        Result := -1;
        Exit;
    end;
        pos1 := Pos('.', temp);
        if (pos1 = 0) then
        begin
            Result := StrToInt(temp);
            temp := '';
        end
        else
        begin
            part := Copy(temp, 1, pos1 - 1);
            temp := Copy(temp, pos1 + 1, Length(temp));
            Result := StrToInt(part);
        end;
end;

function CompareInner(var temp1, temp2: String): Integer;
var
    num1, num2: Integer;
begin
    num1 := GetNumber(temp1);
    num2 := GetNumber(temp2);
    if (num1 = -1) or (num2 = -1) then
    begin
        Result := 0;
        Exit;
    end;
        if (num1 > num2) then
        begin
            Result := 1;
        end
        else if (num1 < num2) then
        begin
            Result := -1;
        end
        else
        begin
            Result := CompareInner(temp1, temp2);
        end;
end;

function CompareVersion(str1, str2: String): Integer;
var
    temp1, temp2: String;
begin
    temp1 := str1;
    temp2 := str2;
    Result := CompareInner(temp1, temp2);
end;

function UpdateSetup(): Boolean;
var
    oldVersion: String;
    uninstaller: String;
    ErrorCode: Integer;
begin

    if RegKeyExists(HKEY_LOCAL_MACHINE,'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{#appid}_is1') then
    begin
        RegQueryStringValue(HKEY_LOCAL_MACHINE,'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{#appid}_is1','DisplayVersion', oldVersion);
        if (CompareVersion(oldVersion, '{#appversion}') <= 0) then
        begin
        if MsgBox('已安装版本：' + oldVersion + ' 的应用. 是否覆盖安装新版本?',mbConfirmation, MB_YESNO) = IDYES then
        begin          
            Result := True;
        end     
        else
        begin
            Result := False;
        end;
        end
        else
        begin
        MsgBox('已安装较新版本（ ' + oldVersion + ' ）的应用。安装程序即将退出',mbInformation, MB_OK);
        Result := False;
        end;
    end
    else
    begin
        Result := True;
    end;
end;

将升级检测流程添加到安装流程中

function InitializeSetup(): Boolean;
var 
    Success:Boolean;
begin
    Success:=true;

    //升级检测
    if not UpdateSetup() then
    begin
        Success:=false;
    end
    else begin end;

    result := Success;        
end;

扩展操作 —— 应用是否打开检测

安装过程中检测旧版本应用是否开启，若开启，则自动关闭，然后继续安装流程。

//-----------------------------------------
//关闭应用
procedure CloseApp(AppName: String);
var
    WbemLocator : Variant;
    WMIService   : Variant;
    WbemObjectSet: Variant;
    WbemObject   : Variant;
begin;
    WbemLocator := CreateOleObject('WbemScripting.SWbemLocator');
    WMIService := WbemLocator.ConnectServer('localhost', 'root\CIMV2');
    WbemObjectSet := WMIService.ExecQuery('SELECT * FROM Win32_Process Where Name="' + AppName + '"');
    if not VarIsNull(WbemObjectSet) and (WbemObjectSet.Count > 0) then
    begin
        WbemObject := WbemObjectSet.ItemIndex(0);
        if not VarIsNull(WbemObject) then
        begin
        WbemObject.Terminate();
        WbemObject := Unassigned;
        end;
    end;
end;
//--------------------------------------

//安装包初始化
function InitializeSetup(): Boolean;
var 
    Success:Boolean;
    IsRunning: Integer;
begin
    Success:=true;

    IsRunning:=FindWindowByWindowName('HelloWorld');
    if IsRunning<>0 then 
    begin
        if Msgbox('安装程序检测到客户端正在运行。' #13#13 '您必须先关闭它然后单击“是”继续安装，或按“否”退出！', mbConfirmation, MB_YESNO) = idNO then
        begin
            Success:=false;
        end
        else 
        begin
            CloseApp('HelloWorld.exe');       
        end;
    end 
    else begin end;

    if Success then 
    begin
        //升级检测
        if not UpdateSetup() then
        begin
            Success:=false;
        end
        else begin end;
    end;

    result := Success;        
end;

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掘：奇葩史