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App Inventor 2 图片缩放并返回Base64文本 - App应用开发 - 清泛IT社区，为创新赋能！
图片缩放并Base64化 参考代码如下：（注：图片可拖动至编程区，自动还原代码块）
参考用法如下：
其中，用到的SimpleBase64拓展，点此查看。其中，用到的TaifunImage拓展，点此查看。
来源中文文档：https://www.fun123.cn/reference/ ......
解决：文本输入框在键盘弹起输入框看不见时，键盘退格键删除不了内容？ - A...
是因为区域隐藏了导致的。
screen1 的属性 “允许滚动” 勾选上，完美解决：
允许滚动后，区域就是自动的，输入框永远在视线内，键盘响应全部正常。
用户反馈文本输入框光标问题 - 用户反馈 - 清泛IT社区，为创新赋能！
还有一个问题，我用老巫婆那个网站 和现在的同样工程对比如下 ： 1、老巫婆光标会自动退出 2、老巫婆串口通信350MS一次 不会死机 现在的1000MS 才不会死机.
感觉使用起来， 没有他那个网站好...
TextEnhancer拓展 - 增强App中的文本格式 - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
About[size=15.008px]Introducing TextEnhancer, the ultimate extension for enhancing text formatting in your App Inventor projects! With TextEnhancer, you can effortlessly add advanced text features to your app, making it more dynamic and engaging for your users.Blocks[size=15.008px]SetTextJustificati...
How can I search (case-insensitive) in a column using LIKE wildcard?
...
SELECT *
FROM trees
WHERE trees.`title` COLLATE UTF8_GENERAL_CI LIKE '%elm%'
Actually, if you add COLLATE UTF8_GENERAL_CI to your column's definition, you can just omit all these tricks: it will work automatically.
ALTER TABLE trees
MODIFY COLUMN title VARCHAR(…) C...
Using PowerShell to write a file in UTF-8 without the BOM
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Using .NET's UTF8Encoding class and passing $False to the constructor seems to work:
$MyRawString = Get-Content -Raw $MyPath
$Utf8NoBomEncoding = New-Object System.Text.UTF8Encoding $False
[System.IO.File]::WriteAllLines($MyPath, $MyRawS...
How to get UTF-8 working in Java webapps?
...g:
CREATE DATABASE `ID_development`
/*!40100 DEFAULT CHARACTER SET utf8 COLLATE utf8_swedish_ci */;
Then, all of the tables need to be in UTF-8 also:
CREATE TABLE `Users` (
`id` int(10) unsigned NOT NULL auto_increment,
`name` varchar(30) collate utf8_swedish_ci default NULL
...
Effective way to find any file's Encoding
... 0xef && bom[1] == 0xbb && bom[2] == 0xbf) return Encoding.UTF8;
if (bom[0] == 0xff && bom[1] == 0xfe && bom[2] == 0 && bom[3] == 0) return Encoding.UTF32; //UTF-32LE
if (bom[0] == 0xff && bom[1] == 0xfe) return Encoding.Unicode; //UTF-16LE
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Remove non-utf8 characters from string
Im having a problem with removing non-utf8 characters from string, which are not displaying properly. Characters are like this 0x97 0x61 0x6C 0x6F (hex representation)
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MySQL case insensitive select
...lumn in create table statement this way instead: varchar(20) CHARACTER SET utf8 COLLATE utf8_bin
– gregthegeek
Mar 19 '14 at 18:56
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