ExtJS3 虚拟键盘插件在 ExtJS4 中引发异常
我使用了可用的虚拟键盘插件此处< /a> 在 Ext JS 3 中：
它似乎不适用于 Ext JS 4 。我已经更改了 VirtualKeyboard.js 文件 &它看起来如下，问题是 BackSpace 给了我一个错误： Uncaught TypeError: Cannot read property 'length' of undefined
执行时抛出 dom.value.substr(0, dom.value.length - 1)
这里修改为 VirtualKeyboard.js ： http://www.sencha.com/forum /showthread.php?147963-Extjs-4-virtual-keyboard-plugin
I had used virtual keyboard plugin available here in Ext JS 3 :
It does not seem to be working with Ext JS 4 . I have changed VirtualKeyboard.js file & it looks as follwing, problem is BackSpace gives me an error :
Uncaught TypeError: Cannot read property 'length' of undefined
Thrown while executing dom.value.substr(0, dom.value.length - 1)
Here is modified VirtualKeyboard.js :
http://www.sencha.com/forum/showthread.php?147963-Extjs-4-virtual-keyboard-plugin
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无需在原始虚拟键盘文件中进行更改，而是使用 sencha 提供的 Ext JS 3 到 Ext JS 4 迁移包。这将允许您在 Ext JS 4 下运行 Ext 3 代码。您可以使用此包，直到虚拟键盘的原作者提供 ext js 4 的补丁。使用此包不会对 Ext JS 4 的性能产生巨大影响应用程序，因为增加了间接性。
您可以从此处下载迁移包。
干杯。
Instead of making changes in the original virtual keyboard file, use the sencha provided, Ext JS 3 to Ext JS 4 migration pack. This will allow the you to run Ext 3 code under Ext JS 4. You can use this pack until the original author of the virtual keyboard provides a patch for ext js 4. Using this pack does not have a drastic effect on the performance of the application because of the increased indirection.
You can download the migration pack from here.
Cheers.
要修复错误，请使用 Firebug 并调试
dom变量的内容。看来您的keyboardTarget变量的值错误，或者您需要修复您的值访问器，那么您应该选择el并使用el.getValue 访问它()（未经测试！）To fix you error use Firebug and debug the content of your
domvariable. It seems that either yourkeyboardTargetvariable has a wrong value or you need to fix your value accessor then you should just select theeland access it withel.getValue()(untested!)