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App Inventor2 如何在screen2保留变量？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
问题一：如果在screen1初始化了一个全局变量，能够在screen2保留此变量吗？
问题二：当一个按钮被点击过后，能否重新点击执行不同的程序?
求解问题1请参考：《App Inventor在不同的屏幕之间传递变量》
问题2可以点击第一次设...
App Inventor 2 复制屏幕功能，界面设计更便捷，避免误删组件 · App Inventor 2 中文网
...捷，避免误删组件
1、Screen1屏幕上有若干组件、及一个SQLite拓展：
2、点击工具栏上的“复制屏幕”按钮，输入新屏幕名称：
3、复制后的Screen2：
4、代码块也一并成功复制，且代码块中的...
How to redirect output of an already running process [duplicate]
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Screen
If process is running in a screen session you can use screen's log command to log the output of that window to a file:
Switch to the script's window, C-a H to log.
Now you can :
$ tail -f screenlog.2 | grep whatever
F...
How do I specify different layouts for portrait and landscape orientations?
...orking when i am using , android:configChanges="orientation|keyboardHidden|screenSize"
– Tushar Pandey
Feb 11 '14 at 6:53
9
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How to make a programme continue to run after log out from ssh? [duplicate]
... @LordLoh. Afaik, the only practical way to do this is to use tmux or screen.
– James M. Lay
Feb 11 '16 at 21:20
2
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How to get the browser viewport dimensions?
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different screen size variables/solutions live test: ryanve.com/lab/dimensions
– Alex Pandrea
Jun 4 '19 at 11:34
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How to change collation of database, table, column?
...from the drop down list >> and once you press {Go} at the top of the screen you will see a message:
Your SQL query has been executed successfully
and a script
ALTER TABLE `tableName` CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci
But it will NOT change the collations of exi...
How to listen for a WebView finishing loading a URL?
...s improved a lot, but not perfect yet. Sometimes the app freeze on loading screen and it is impossible to exit, unless you disconnect the network or connect in another good one. I don't know how to solve this yet, I'm trying.
– Felipe
Jul 18 '11 at 0:10
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Making macOS Installer Packages which are Developer ID ready
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Installer supported since the beginning RTFD files to make pretty Welcome screens with images, but productbuild doesn't accept them.
Workarounds:
Use a dummy rtf file and replace it in the package by after productbuild is done.
Note: You can also have Retina images inside the RTFD file. Use mul...
Show AlertDialog in any position of the screen
When we show an AlertDialog in android it shows in the center of the screen. Is there any way to change the position?
4 An...