GWT 包括来自模块清单的外部 javascript 文件
因此,我阅读了有关直接在模块清单 yourApplication.gwt.xml (http://code.google.com/webtoolkit/doc/latest/DevGuideOrganizingProjects.html) 中包含外部 Javascript 文件的文档,
我有一个名为 iscroll 的 javascript 文件。 js 并存储在 GWT 项目的 war/ 文件夹中。
我将这一行添加到 GWT 应用程序的模块清单中:
<script src="iscroll.js"/>
然后,从 onModuleLoad()
方法中,我调用此本机 JSNI 方法:
private native void initJavascript() /*-{
$wnd.myScroll = new iScroll('jokeWrapperLabel');
}-*/;
然后,当我在浏览器中运行代码时,我不断收到“iScroll is undefined” ”。
知道我做错了什么吗?
这是“iScroll 未定义错误”的输出
18:32:41.780 [ERROR] [jollyjokesprogwt] Unable to load module entry point class com.wanderlust.jollyjokespro.gwt.client.JollyJokesProGWT (see associated exception for details)
com.google.gwt.core.client.JavaScriptException: (ReferenceError): iScroll is not defined
stack: ReferenceError: iScroll is not defined
at [object Object].<anonymous> (unknown source)
at __gwt_jsInvoke (http://127.0.0.1:8888/jollyjokesprogwt/hosted.html?jollyjokesprogwt:76:35)
at http://127.0.0.1:8888/jollyjokesprogwt/hosted.html?jollyjokesprogwt:280:16
at C (http://127.0.0.1:8888/jollyjokesprogwt/jollyjokesprogwt.nocache.js:2:148)
at http://127.0.0.1:8888/jollyjokesprogwt/jollyjokesprogwt.nocache.js:8:593
type: not_defined
arguments: iScroll
__gwt_ObjectId: 91
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:237)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:126)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:289)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:107)
at com.wanderlust.jollyjokespro.gwt.client.JollyJokesProGWT.initJavascript(JollyJokesProGWT.java)
at com.wanderlust.jollyjokespro.gwt.client.JollyJokesProGWT.onModuleLoad(JollyJokesProGWT.java:228)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396)
at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:183)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:510)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:352)
at java.lang.Thread.run(Unknown Source)
So I read the documentation about including an external Javascript file directly in the module manifest yourApplication.gwt.xml (http://code.google.com/webtoolkit/doc/latest/DevGuideOrganizingProjects.html)
I have this javascript file called iscroll.js and stored in the war/ folder of the GWT project.
I added the line to the module's manifest of my GWT application:
<script src="iscroll.js"/>
Then from the onModuleLoad()
method I call this native JSNI method:
private native void initJavascript() /*-{
$wnd.myScroll = new iScroll('jokeWrapperLabel');
}-*/;
Then when I run the code in the browser I keep getting "iScroll is undefined".
Any idea what am I doing wrong?
This is the output of the "iScroll is undefined error"
18:32:41.780 [ERROR] [jollyjokesprogwt] Unable to load module entry point class com.wanderlust.jollyjokespro.gwt.client.JollyJokesProGWT (see associated exception for details)
com.google.gwt.core.client.JavaScriptException: (ReferenceError): iScroll is not defined
stack: ReferenceError: iScroll is not defined
at [object Object].<anonymous> (unknown source)
at __gwt_jsInvoke (http://127.0.0.1:8888/jollyjokesprogwt/hosted.html?jollyjokesprogwt:76:35)
at http://127.0.0.1:8888/jollyjokesprogwt/hosted.html?jollyjokesprogwt:280:16
at C (http://127.0.0.1:8888/jollyjokesprogwt/jollyjokesprogwt.nocache.js:2:148)
at http://127.0.0.1:8888/jollyjokesprogwt/jollyjokesprogwt.nocache.js:8:593
type: not_defined
arguments: iScroll
__gwt_ObjectId: 91
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:237)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:126)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:289)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeVoid(JavaScriptHost.java:107)
at com.wanderlust.jollyjokespro.gwt.client.JollyJokesProGWT.initJavascript(JollyJokesProGWT.java)
at com.wanderlust.jollyjokespro.gwt.client.JollyJokesProGWT.onModuleLoad(JollyJokesProGWT.java:228)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:396)
at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:183)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:510)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:352)
at java.lang.Thread.run(Unknown Source)
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您需要将 JavaScript 文件放在公共文件夹中,请参阅此 stackoverflow 答案了解其工作原理:gwt 和 javascript文件
并且对
iScroll(..
) 的调用必须是$wnd.iScroll(..
)。You need to place the JavaScript file in a public folder, see this stackoverflow answer on how that works: gwt and javascript files
and the call to
iScroll(..
must be$wnd.iScroll(..
.