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GestureDetector 手势检测拓展：识别向上/向下/向右/向左滑动和双击等手势...
...即可。
然后，您就可以使用所有事件了。
来源：https://community.kodular.io/t/f ... d-doubleclick/94542
已整理：https://www.fun123.cn/reference/ ... /gesturedetect.htmlhttps://www.fun123.cn/reference/other/extensionsMultitouch.html
https://www.fun123.cn/reference/ot...
How to create a self-signed certificate for a domain name for development?
... hand side
On the right hand side under Actions select Bindings
Add a new HTTPS binding and select the certificate you just created (if your certificate is a wildcard certificate you'll need to specify a hostname)
Click OK and test it out.
...
How to do a https request with bad certificate?
Say I want to get https://golang.org programatically. Currently golang.org (ssl) has a bad certificate which is issued to *.appspot.com So when I run this:
...
How to find out what type of a Mat object is with Mat::type() in OpenCV
...epth = type & CV_MAT_DEPTH_MASK;
uchar chans = 1 + (type >> CV_CN_SHIFT);
switch ( depth ) {
case CV_8U: r = "8U"; break;
case CV_8S: r = "8S"; break;
case CV_16U: r = "16U"; break;
case CV_16S: r = "16S"; break;
case CV_32S: r = "32S"; break;
case CV_32F: r ...
App Inventor 2 最新QA汇总 - App Inventor 2 中文网 - 清泛IT社区，有思想、有深度
...识点也补充进了文档，是官方的中文化升级版本。参考：https://www.fun123.cn/reference/info/ReleaseNotes.html
Q：ai2Starter模拟器中AI伴侣版本过旧，可否升级到最新版本？
A：有办法，但是过程较为复杂，需要一定的技术功底。而且这...
App Inventor 2 MultiImagePicker 拓展：实现图片/视频多选功能 - App Inve...
...
- 可设置最大选择数量
- 可过滤文件类型
官方文档：https://www.fun123.cn/reference/extensions/MultiImagePicker.html
二、属性
MimeFilter（图片过滤类型）
- 默认值：image/*
- 单选和多选都会使用这个过滤条件
- 如果想选择视频，可...
Error when trying to obtain a certificate: The specified item could not be found in the keychain
...k, or the default will include whatever's in the brackets [].
Common Name (CN) should be your private key name (e.g., John Doe Dev Key)
Email Address should be your email address (e.g. thon@example.com)
Everything else should be blank
Verify your CSR
$ openssl req -noout -text -in Certificates.cs...
Received fatal alert: handshake_failure through SSLHandshakeException
...rs may ignore this, but the same is not the case for SSL clients (like the HttpsURLConnection class, or any HTTP Client library like Apache HttpComponents Client).
Most these client classes/libraries would rely on the trust store used by the JVM for certificate validation. In most cases, this will ...
App Inventor 2 扩展开发实战：从Java小白到发布第一个.aix自定义插件 - Ap...
...是最大门槛，但只需要做一次。
# 1. 克隆仓库
git clone https://github.com/mit-cml/appinventor-sources.git
cd appinventor-sources
# 2. 确认依赖
# 需要 JDK 8、ant、Python 2.7（或3.x兼容模式）
java -version
# 3. 编译核心库
ant MakeExtensions
国内...
程序员之网络安全系列（五）：数字证书以及12306的证书问题 - 更多技术 - ...
...个证书添加到操作系统里。
那么，问题来了，当你访问https://www.12306.cn 时，你就会得到下面的结果
这是为什么呢？
我相信你看完本文应该清楚，那是因为12306 自己给自己发了个证书，而这个证书默认是没有被操作系统信任...