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https://bbs.tsingfun.com/thread-2102-1-1.html 

蓝牙接收的数据怎么一行一行更新显示和,类似图2这样的 - App应用开发 - 清...

在做BLE蓝牙显示app。蓝牙端一个数据一个数据的发送,但是显示的时候后一个会覆盖上一个 无法将接收的数据全部罗列出来,而且显示的还有问题,有时候显示一个,有时候显示3个数据。求解!!使用列表显示框组件,详见文...
https://bbs.tsingfun.com/thread-2323-1-1.html 

【解决】App Inventor 2 中文版服务启动超时,问题排查 - App Inventor 2 ...

离线版启动失败,报超时错误: 可能性排查如下: 1、安装目录有中文,卸载重新安装,目录不要有中文即可,当然最好也不要有空格。这个逻辑也考虑过做到安装时自动检查,目前有技术细节没解决,后续会继续研究。 ...
https://bbs.tsingfun.com/thread-2597-1-1.html 

App Inventor 2 ECharts 拓展:画饼图 - App应用开发 - 清泛IT社区,为创新赋能!

...,请点击右侧“文档反馈”进行反馈! ECharts 拓展 使用AppInventor2布局进行展示的图表拓展,基于ECharts强大的js图表库开发,持续提供酷炫实用的图表展示。饼图 效果如下:设置透明背景属性后,效果如下:代码块如下:图表导...
https://bbs.tsingfun.com/thread-2600-1-1.html 

App Inventor 2 ECharts 拓展:画仪表图 - App应用开发 - 清泛IT社区,为创新赋能!

仪表图 效果如下:代码如下: Gauge(startAngle,endAngle,min,max,value)画仪表图。startAngle:起始角度; endAngle:结束角度; min:最小值; max:最大值; value:当前值。角度值参考如下: 来源:https://www.fun123.cn/reference/extensions/ECharts.h...
https://bbs.tsingfun.com/thread-2692-1-1.html 

程序写出来手机app会反转怎么办?怎么固定住? - App Inventor 2 中文网 - ...

screen1 屏幕方向属性,选择“锁定竖屏”就可以了,这样屏幕就不会横屏和竖屏自动切换了。
https://bbs.tsingfun.com/thread-2702-1-1.html 

app inventor 2 有HexToString组件吗? - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

同这篇帖子《什么是 Hex 编码方式?》:https://bbs.tsingfun.com/thread-2700-1-1.html 使用 ByteArray 拓展 的 ToHex 方法可以实现将无符号数字转换为其十六进制表示。
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What does an exclamation mark mean in the Swift language?

...? As far as I can work out (this is very new to me, too)... The term "wrapped" implies we should think of an Optional variable as a present, wrapped in shiny paper, which might (sadly!) be empty. When "wrapped", the value of an Optional variable is an enum with two possible values (a little like...
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AngularJS - Access to child scope

... ... </div> </div> Where in ChildController you have : app.controller('ChildController', ['$scope', '$rootScope', function ($scope, $rootScope) { this.init = function() { $scope.parentCtrl.childCtrl = $scope.childCtrl; $scope.childCtrl.test = 'aaaa'; ...
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iOS 6: How do I restrict some views to portrait and allow others to rotate?

I have an iPhone app that uses a UINavigationController to present a drill-down interface: First one view, then another, up to four levels deep. I want the first three views restricted to portrait orientation and only the last view should be allowed to rotate to landscape. When returning from the ...
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S3 Static Website Hosting Route All Paths to Index.html

I am using S3 to host a javascript app that will use HTML5 pushStates. The problem is if the user bookmarks any of the URLs, it will not resolve to anything. What I need is the ability to take all url requests and serve up the root index.html in my S3 bucket, rather than just doing a full redirect. ...