大约有 30,000 项符合查询结果(耗时:0.0284秒) [XML]

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请问各位前辈大佬关于APP熄灭屏幕后停止响应的问题。 - App Inventor 2 拓...

...、让屏幕常亮。 或 2、长时间息屏,再打开App时判断MQTT连接及订阅状态,进行重连、重新订阅。引用: App Inventor 2  发表于 2025-07-08 18:28 1、让屏幕常亮。 或 2、长时间息屏,再打开App时判断MQTT连接及订阅状态,进行重...
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mqtt协议一般最大支持订阅几个主题? - 创客硬件开发 - 清泛IT社区,为创新赋能!

...服务提供商也有自己的限制。例如,AWS IoT Core 对单个MQTT连接的订阅数限制是 50个。这是一个非常具体的硬性限制,超过后会收到错误。 结论一:你首先需要查阅你所使用的Broker的文档,来确认其默认行为和最大可配置值。2. MQ...
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AppInventor2项目是自动保存的吗? - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

... Q:每次修改组件/代码块之后,AI伴侣如何及时更新? 连接菜单 -> 刷新AI伴侣屏幕: 界面有更新会自动刷新;代码块有更新需要点上面菜单手动刷新后立马生效。 千万不要傻乎乎的每次断开连接,再重连哦~
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鸿蒙的证书适用范围 - HarmonyOS NEXT - 清泛IT社区,为创新赋能!

...工作原理:当您在 DevEco Studio 中勾选“自动生成签名”并连接设备时,IDE 会自动帮您完成一系列操作: 1. 自动获取您连接设备的 UDID。 2. 使用您的华为开发者账号,在后台自动申请调试证书。 3. 生成密钥库文件(.p12)和...
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UrsPahoMqttClient心跳问题解决——Paho底层已自动处理,设好KeepAlive就行...

问一下心跳PingReq报文怎么发的 目的为保持 MQTT 连接,否则会被踢下线。 用的是什么MQTT扩展?UrsPahoMqttClient。 结论:不需要手动发心跳,Paho底层已内置实现 UrsPahoMqttClient 封装的是 Eclipse Paho MQTT 客户端,心跳(PingReq)...
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How to check the version before installing a package using apt-get?

... answered Sep 19 '13 at 7:05 Yasiru GYasiru G 5,70955 gold badges1616 silver badges3636 bronze badges ...
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python location on mac osx

...ed), but an alias file called 'Current', which, when clicked, gives me the error "The operation can't be competed because the original item for 'Current' can't be found." – Pyderman Jul 22 '15 at 14:00 ...
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Dealing with float precision in Javascript [duplicate]

...000000004 > (x * cf) * (y * cf) / (cf * cf) 0.02 Quick solution: var _cf = (function() { function _shift(x) { var parts = x.toString().split('.'); return (parts.length < 2) ? 1 : Math.pow(10, parts[1].length); } return function() { return Array.prototype.reduce.call(argum...
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What is the best way to repeatedly execute a function every x seconds?

... @JavaSa: because "do your stuff" is not instantaneous and errors from time.sleep may accumulate here. "execute every X seconds" and "execute with a delay of ~X seconds repeatedly" are not the same. See also this comment – jfs Jan 25 '17 at 15:...
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How to install Xcode Command Line Tools

... "Xcode.SDKs" = ( ); }; version = "1.1.1"; }. Error: Error Domain=NSCocoaErrorDomain Code=3840 "The data couldn’t be read because it has been corrupted." (Encountered unknown ampersand-escape sequence at line 18) UserInfo=0x401bc8e60 {NSDebugDescription=Encountered unk...