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How to unpack and pack pkg file?
I have a pkg file created by Install Maker for Mac.
I want to replace one file in pkg. But I must do this under Linux system, because this is a part of download process. When user starts to download file server must replace one file in pkg.
I have a solution how unpack pkg and replace a file but I d...
The operation is list empty? cannot accept the arguments: , ["&qu...
...本身就是空的情况，空对象无法调用它的任何方法，导致App崩溃。
多加一个判断（文本.是否为空），可以避免这类问题：
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{:8_389:}The arguments,[“xxx“], [false], [0]
您好，如果我想设置如果到某个时间就显示文字，怎么做 - App Inventor 2 中...
...时间和格式化，参考：https://bbs.tsingfun.com/thread-1534-1-1.htmlApp Inventor 2 发表于 2024-03-22 19:09
获取当前时间和格式化，参考：https://bbs.tsingfun.com/forum.php?mod=viewthread&tid=1534&fromguid=hot& ...
感觉还是不是很懂App Inventor 2&n...
BLE &APP交互学习教程01——下发指令 - 创客硬件开发 - 清泛IT社区，为创新赋能！
BLE模块性价比高，无需配对就可以连接使用，从本节开始，我们着重来学习使用BLE控制和显示。
1.界面设计
2.逻辑设计
3.APP工程
4.下位机工程
{:8_381:}
我想使用照相机组件显示出错 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...pt the arguments: , ["file:///storage/emulated/0/Android/data/edu.mit.appinventor.aicompanion3/files/Pictures/app_inventor_1727434191034.jpg"]
注意： 5秒钟后将报告另一条错误信息。
源码在这里
你好，根据报错信息，你把路径文本值设置给...
如何更改启动屏幕 - App应用开发 - 清泛IT社区，为创新赋能！
...这个新建的login是在screen1后面，如何调换它们的位置，让APP启动时，先从login启动？无法指定启动的屏幕，默认就是特定的Screen1。两种思路：
1、使用“复制屏幕”功能将Screen1复制一份为主屏幕，原来的Screen1改为登录页。
2、S...
求助各位大佬！ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...确显示识别的信息。显示完后一直显示报错警告框，然后app就卡住了{:8_372:}请提供一下报错相关的截图，这个报错信息更为关键！同：https://bbs.tsingfun.com/thread-2349-1-1.html
What's the bad magic number error?
...the pyc file or trying to run a pyc from a different version of python (usually later) than your interpreter.
If they are your pyc files, just delete them and let the interpreter re-compile the py files. On UNIX type systems, that could be something as simple as:
rm *.pyc
or:
find . -name '*.py...
“sending 'const NSString *' to parameter of type 'NSString *' discards qualifiers” warning
I have Constants NSString, that I want to call like:
3 Answers
3
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How can I get the current screen orientation?
...lues ORIENTATION_PORTRAIT and ORIENTATION_LANDSCAPE. Is there a way to get all the four values from ActivityInfo? (That is LANDSCAPE_REVERSE and PORTRAIT_REVERSE as well)
– HRJ
May 4 '11 at 9:56
...