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摄像头画面显示 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!
...?
如果图片url或云平台地址地址访问不了,那就是平台问题。
可能是你自己搭建的平台有问题,也可能是第三方平台配置等问题。总之先保证平台访问正常!
Error 507: unable to connect. is the device turned on? 无法连接,设备...
英文资料显示,可能是蓝牙设备问题未开机之类的,也可能是连接相关的代码写的不对,用的错误的地址连接等。
一般来说多是使用 hc05 经典蓝牙连接出现的问题,配对后没通电开机,会报这个错误。配对后硬件发生变...
如何让初始化全局变量为自己输入的数值 - App Inventor 2 中文网 - 清泛IT...
...局变量:
3、除法一定要判断除数非零:
出现报错问题13016915507 发表于 2024-10-04 21:26
出现报错问题
请提供以一下报错截图问题已经重新发帖
Error 1801 : Security Error Receiving Blocks from Browser. - App Inven...
...此我们将调查发生了什么。
因此,看起来这里有两个问题。首先,由于您的应用启用了高对比度模式,但 iOS 上还没有这个选项,因此它在初始化期间会抛出错误。不知何故,这被解释为安全错误,但我们仍需要找出原因。在...
APP被手机识别为疑似病毒 - App应用开发 - 清泛IT社区,为创新赋能!
...用,忽略警告,加入白名单,继续安装,使用上没有任何问题。有些手机有所谓的“纯净模式”阻止安装,可以考虑在设置中关闭它。
2、如果想要发布,可以先线上检测一下:https://m.qq.com/security_lab/scans_online.jsp
上传APK文件...
QRCodeGenerator 拓展使用后,apk编译失败 - 用户反馈 - 清泛IT社区,为创新赋能!
...s
这个是核心原因,应该这个类重复了。
这个拓展的问题,里面放了zxing源码,zxing是谷歌的二维码库,但是appinventor内置有,这个拓展里面也有,类重复了导致编译失败。
查了一下原版的帖子中有人提出过这个问题,但...
Null vs. False vs. 0 in PHP
...other good "nothing" entities.
What is the difference, specifically in PHP? Does it have something to do with === ?
1...
Disabling Strict Standards in PHP 5.4
I'm currently running a site on php 5.4, prior to this I was running my site on 5.3.8. Unfortunately, php 5.4 combines E_ALL and E_STRICT , which means that my previous setting for error_reporting does not work now. My previous value was E_ALL & ~E_NOTICE & ~E_STRICT Should I just ena...
Why is require_once so bad to use?
Everything I read about better PHP coding practices keeps saying don't use require_once because of speed.
14 Answers
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Check if PHP session has already started
I have a PHP file that is sometimes called from a page that has started a session and sometimes from a page that doesn't have session started. Therefore when I have session_start() on this script I sometimes get the error message for "session already started". For that I've put these lines:
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