按鈕只觸發一次Google Apps腳本

Question

我試圖讓一個按鈕不止一次觸發（即多次點擊），但它似乎不工作。任何幫助將不勝感激。理論上它應該觸發多次，但只觸發一次，當我在日誌中

function a 
{ 
... 
var addcolumnspanel = app.createHorizontalPanel().setId("addcolumnspanel"); 
    var addbuttonhandler = app.createServerHandler("addcolumn"); 
    var addbutton = app.createButton().setId("btnaddcolumn").setText("Add another column").addClickHandler(addbuttonhandler); 

... 
return app; 
} 

function addcolumn() 
{ 
...//Do some stuff 
return app; 
} 

檢查它這裏是一個更精確的代碼示例

//set global var 
var counter = 1; 
var ss = SpreadsheetApp.getActiveSpreadsheet(); 
//Set up the Menu bar 
function onOpen() { 
// Logger.clear(); 
    var menuEntries = [ {name: "demo", functionName: "myFunction"}]; 
    ss.addMenu("Demo", menuEntries); 

} 

function myFunction() { 

    var myapp = UiApp.createApplication().setHeight(430).setWidth(800);; 
    var button = myapp.createButton("Clicky"); 
    var myhandler = myapp.createServerHandler("secondfunction"); 
    var myhandler = button.addClickHandler(myhandler) 
    myapp.add(button); 
    ss.show(myapp); 
} 

function secondfunction() 
{ 
    counter++; 
    Logger.log(counter); 

} 

Answer 1

確定。問題在於計數器變量。您不能在Apps Script中使用全局變量。有關更多信息，請參閱this answer。您可以使用ScriptProperties或CacheService作爲替代方案。

var ss = SpreadsheetApp.getActiveSpreadsheet(); 
//Set up the Menu bar 
function onOpen() { 
// Logger.clear(); 
    var menuEntries = [ {name: "demo", functionName: "myFunction"}]; 
    ss.addMenu("Demo", menuEntries); 
    // Store your counter in CacheService as a string. 
    CacheService.getPrivateCache().put('counter','1',3600); 
} 

function myFunction() { 

    var myapp = UiApp.createApplication().setHeight(430).setWidth(800);; 
    var button = myapp.createButton("Clicky"); 
    var myhandler = myapp.createServerHandler("secondfunction"); 
    var myhandler = button.addClickHandler(myhandler) 
    myapp.add(button); 
    ss.show(myapp); 
} 

function secondfunction() 
{ 
    var cache = CacheService.getPrivateCache(); 
    var counter = parseInt(cache.get('counter')); 
    counter ++; 
    cache.put('counter', counter.toString()); 
    Logger.log(counter); 

}