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AppInventor 能否实现按钮长按修改按钮文本的功能？ - App应用开发 - 清泛I...
如题，按钮的长按事件待研究。
使用计时器、计数器变量以及按钮.按下和弹起事件，可以实现，参考代码如下：
英文社区中的方案都是类似这样实现的，是一个不错的方案。
来自：https://community.appinventor.mit.edu/t/long...
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...
GestureDetector 手势检测拓展，用于检测手势，例如向上/向下/向右/向左滑动和双击、单击、长按
它太容易使用了。只需在布局块中输入一个布局组件即可。
然后，您就可以使用所有事件了。
来源：https://community.kodular....
ComponentTools 拓展：设置组件的边距 - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
https://community.kodular.io/t/f ... ols-extension/78798
https://community.appinventor.mi ... ols-extension/15803
https://community.appinventor.mi ... hin-a-label/65831/9
Bottom Navigation Bar 底部导航栏 - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
[size=15.008px]A simple extension to create bottom navigation bar like above,[size=15.008px]Created using Rush.
[size=15.008px]Untitled[size=15.008px]328×585 15.4 KB
[size=15.008px]Screenshot_20240627-102612[size=15.008px]1080×2340 136 KB[size=15.008px]
[size=15.008px]https://...
Ruby, remove last N characters from a string?
... 2.5 you can use delete_suffix or delete_suffix! to achieve this in a fast and readable manner.
The docs on the methods are here.
If you know what the suffix is, this is idiomatic (and I'd argue, even more readable than other answers here):
'abc123'.delete_suffix('123') # => "abc"
'abc123'...
What's the difference between a proc and a lambda in Ruby?
And when would you use one rather than the other?
8 Answers
8
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Tips for debugging .htaccess rewrite rules
Many posters have problems debugging their RewriteRule and RewriteCond statements within their .htaccess files. Most of these are using a shared hosting service and therefore don't have access to the root server configuration. They cannot avoid using .htaccess files for rewriting and cannot e...
Accurate way to measure execution times of php scripts
...ts in seconds, according to PHP documentation.
– Alejandro Iván
Mar 31 '15 at 2:34
6
@patrick an...
How to delete duplicate lines in a file without sorting it in Unix?
...ay then seen[$0] will evaluate to false. The ! is the logical NOT operator and will invert the false to true. Awk will print the lines where the expression evaluates to true. The ++ increments seen so that seen[$0] == 1 after the first time a line is found and then seen[$0] == 2, and so on.
Awk eval...
How can I get around MySQL Errcode 13 with SELECT INTO OUTFILE?
...
Which particular version of Ubuntu is this and is this Ubuntu Server Edition?
Recent Ubuntu Server Editions (such as 10.04) ship with AppArmor and MySQL's profile might be in enforcing mode by default. You can check this by executing sudo aa-status like so:
# sudo a...