Question

我正在尝试在Javascript和jquery中创建自定义选项卡小部件。我已经创建了tab对象，但在分配click事件时遇到问题需要查看代码。我有附加事件但它只在最后一个对象上工作。有人可以提出更好的方法吗

function TabTitleBox(TabName){
  this.SelectedBox = 0;
  this.TitleBoxContainer = $('<div>'+TabName+'</div>');
  this.TitleBoxContainer.addClass("STATSTab");
  this.TitleBoxContainer.addClass("UnSelectedTab");
  this.TitleBoxContainer.on('mouseenter',function(){
    CurrentColor = $(this).css('background-color');
    var t = tinycolor(CurrentColor);
    var NewColor = tinycolor.saturate(t,50);
    $(this).css("background-color",NewColor);
  }).on('mouseleave',function(){
    $(this).removeAttr('style','background-color');
  });

  this.SelectTab = function(){
    if(this.SelectedBox == 0){
    $(this.TitleBoxContainer).removeClass("UnSelectedTab");
    $(this.TitleBoxContainer).addClass("SelectedTab");
    this.SelectedBox = 1;
    }
  }

  this.RemoveStyle = function(){
    $(this.TitleBoxContainer).removeAttr('style','background-color');
  }

  this.UnSelectTab = function(){
    if(this.SelectedBox == 1){
    $(this.TitleBoxContainer).removeClass("SelectedTab");
    $(this.TitleBoxContainer).addClass("UnSelectedTab");
    this.SelectedBox = 0;
    }
  }

  return this;
}


TabContainer = new Array();
TabContainer.push(new TabTitleBox("Is first tab"));
TabContainer.push(new TabTitleBox("Is Second tab"));
TabContainer.push(new TabTitleBox("Is Third tab"));
TabContainer.push(new TabTitleBox("Is Fourth tab"));

for(var x = 0; x < TabContainer.length ; x++){
  Tab = TabContainer[x];
  $('body').append(Tab.TitleBoxContainer);
  $(Tab.TitleBoxContainer).on('click', function(){
    if(Tab.SelectedBox == 1){
      Tab.UnSelectTab();
      Tab.SelectedBox = 0;
    }else{
      Tab.SelectTab();
      Tab.SelectedBox = 1;
    }
    Tab.RemoveStyle();
  });
}

找到解决方案，感谢我在代码中完成的答案更改，如下所示。链接可以在http://skondgekar.comeze.com/Test.php

找到

        TabContainer = new Array();
        TabContainer.push(new TabTitleBox("Is first tab"));
        TabContainer.push(new TabTitleBox("Is Second tab"));
        TabContainer.push(new TabTitleBox("Is Third tab"));
        TabContainer.push(new TabTitleBox("Is Fourth tab"));

        var funcs = [];

        for(var x = 0; x < TabContainer.length ; x++){
            Tab = TabContainer[x];
            funcs[x] = (function(Tab){
                return function(){
                    $(Tab.TitleBoxContainer).on('click', function(){
                            if(Tab.SelectedBox == 1){
                                Tab.UnSelectTab();
                            }else{
                                Tab.SelectTab();
                            }
                            Tab.RemoveStyle();
                        });
                }
                })(Tab);

            funcs[x]();
            $('body').append(Tab.TitleBoxContainer);
        }

Answer 1

您需要在点击处理程序上实现正确的闭包。

让我指出你正确的方向：

// (This is untested, but should be pretty close to what you need)

for(var x = 0; x < TabContainer.length ; x++){
  Tab = TabContainer[x];
  $('body').append(Tab.TitleBoxContainer);
  $(Tab.TitleBoxContainer).on('click', myClosure(Tab)); // Calling the closure
}

function myClosure(Tab) { // Binding the current value of the Tab to the function it
    return function()     // and returning the function
        if(Tab.SelectedBox == 1){
          Tab.UnSelectTab();
          Tab.SelectedBox = 0;
        }else{
          Tab.SelectTab();
          Tab.SelectedBox = 1;
        }
        Tab.RemoveStyle();
    });
}

编写闭包的另一种方法是：

for(var x = 0; x < TabContainer.length ; x++){
  Tab = TabContainer[x];
  $('body').append(Tab.TitleBoxContainer);
  $(Tab.TitleBoxContainer).on('click', function(theRealTab) { // Creating closure
    return function(){
      if(theRealTab.SelectedBox == 1){
        theRealTab.UnSelectTab();
        theRealTab.SelectedBox = 0;
      }else{
        theRealTab.SelectTab();
        theRealTab.SelectedBox = 1;
      }
      theRealTab.RemoveStyle();
    }
  })(Tab);    // Binding the current value of Tab to the function variable theRealTab
}

如果没有闭包，click函数中的Tab变量将始终是变量的当前值（在此示例中 - 如果for循环，则处理最后一个Tab）。

欲了解更多信息：

Closures inside loops - 接受的答案有一个非常类似于

的例子

How do closures work

Jquery on（）单击自定义对象上的函数

1 个答案: