Corona SDK 最近的陀螺仪支持似乎没有响应
我正在使用最近每日构建的 Corona SDK（版本 2001.562）向现有应用程序添加陀螺仪支持。不幸的是，我似乎无法让陀螺仪触发事件处理功能。该应用程序在 iPod touch 版本 4.3.3 上运行。
我将陀螺仪附加到事件处理程序，如下所示：
if system.hasEventSource("gyroscope") then
feedbackFile = io.open(system.pathForFile("log.txt", system.DocumentsDirectory), "a");
feedbackFile:write((os.clock()-startupTime).."\tgyroscope on\n");
io.close(feedbackFile);
Runtime:addEventListener( "gyroscope", onGyroscopeDataReceived )
else
feedbackFile = io.open(system.pathForFile("log.txt", system.DocumentsDirectory), "a");
feedbackFile:write((os.clock()-startupTime).."\tgyroscope off\n");
io.close(feedbackFile);
end
当我在设备上启动应用程序，然后关闭它并下载资源文件时，我发现 log.txt 包含带有 的行时间戳和“陀螺仪打开”。到目前为止还不错！
关于事件处理函数：
local function onGyroscopeDataReceived(event)
feedbackFile = io.open(system.pathForFile("log.txt", system.DocumentsDirectory), "a");
feedbackFile:write((os.clock()-startupTime).."\tgyroscope reading delta="..event.deltaRotation..",x="..event.xRotation..",y="..event.yRotation..",z="..event.zRotation.."\n");
io.close(feedbackFile);
end
这行信息永远不会出现在 log.txt 文件中！
请指教。提前致谢！
I'm using a recent daily build of the Corona SDK (version 2001.562) to add gyroscope support to an existing application. Unfortunately, I can't seem to get the event-handling function for the gyroscope to fire. The application is running on an iPod touch, version 4.3.3.
I attach the gyroscope to an event handler like so:
if system.hasEventSource("gyroscope") then
feedbackFile = io.open(system.pathForFile("log.txt", system.DocumentsDirectory), "a");
feedbackFile:write((os.clock()-startupTime).."\tgyroscope on\n");
io.close(feedbackFile);
Runtime:addEventListener( "gyroscope", onGyroscopeDataReceived )
else
feedbackFile = io.open(system.pathForFile("log.txt", system.DocumentsDirectory), "a");
feedbackFile:write((os.clock()-startupTime).."\tgyroscope off\n");
io.close(feedbackFile);
end
When I launch the application on the device, then close it and download the resource files, I find that log.txt contains the line with a timestamp and "gyroscope on". Good so far!
On to the event-handling function:
local function onGyroscopeDataReceived(event)
feedbackFile = io.open(system.pathForFile("log.txt", system.DocumentsDirectory), "a");
feedbackFile:write((os.clock()-startupTime).."\tgyroscope reading delta="..event.deltaRotation..",x="..event.xRotation..",y="..event.yRotation..",z="..event.zRotation.."\n");
io.close(feedbackFile);
end
This line of information never appears in the log.txt file!
Please advise. Thanks in advance!
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问题是 event.deltaRotation 不存在。您可能指的是 event.deltaTime。
然后，当您连接一个 nil 值时，Lua 会抛出错误，并且您编写的代码永远不会完成。 （当您在设备上遇到 Lua 错误时，最新的每日构建现在将打印一条消息。）
该文档显示了如何计算您自己的 deltaDegrees 或 deltaRadians：
http://developer.anscamobile.com/reference/index/events/gyrscope/eventxrotation
The problem is event.deltaRotation doesn't exist. You might mean event.deltaTime.
Then when you concatenate a nil value, Lua throws an error and your write code never gets completed. (The latest daily build will now print out a message when you encounter a Lua error on a device.)
The documentation shows how to compute your own deltaDegrees or deltaRadians:
http://developer.anscamobile.com/reference/index/events/gyroscope/eventxrotation
只是一个疯狂的猜测，但可能你的监听器从未被调用过 --- 我注意到你的 onGyrscopeDataReceived 函数是本地的。如果是这种情况，那么您需要确保在调用 addEventListener 之前声明该变量。
Just a wild guess but it may be your listener is never called --- I noticed your onGyroscopeDataReceived function is local. If that's the case, then you need to make sure the variable is declared prior to the addEventListener call.