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编辑你的应用（复制和粘贴） · App Inventor 2 中文网
...它们。
从 nb182 版本开始，你可以通过按住平台特定键（Windows/Linux 上的 Ctrl，macOS 上的 Command）并单击其他组件来选择多个组件，此功能有时在 App Inventor 中称为多选。
当你选择多个组件时，属性面板将更新为仅显示所选组件...
How to execute a JavaScript function when I have its name as a string
...been mentioned, using something like this would be the best way to do it:
window["functionName"](arguments);
That, however, will not work with a namespace'd function:
window["My.Namespace.functionName"](arguments); // fail
This is how you would do that:
window["My"]["Namespace"]["functionName...
Warn user before leaving web page with unsaved changes
... this by handling the beforeunload event and returning a non-null string:
window.addEventListener("beforeunload", function (e) {
var confirmationMessage = 'It looks like you have been editing something. '
+ 'If you leave before saving, your changes will be lost.';
...
How to hide action bar before activity is created, and then show it again?
...
Setting android:windowActionBar="false" truly disables the ActionBar but then, as you say, getActionBar(); returns null.
This is solved by:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWin...
What does 'wb' mean in this code, using Python?
... you supposed to read that jpg file you need to use 'rb'
More info
On Windows, 'b' appended to the mode
opens the file in binary mode, so
there are also modes like 'rb', 'wb',
and 'r+b'. Python on Windows makes a
distinction between text and binary
files; the end-of-line characters in...
How to resize the iPhone/iPad Simulator?
...
Simulator scale options from Xcode Menu:
Xcode 9.1+:
Menubar ▶ Window ▶ "Here, options available change simulator scale" (Physical Size & Pixel Accurate)
Pixel Accurate: Resizes your simulator to actual (Physical) device's pixels, if your mac system display screen size (pixel) ...
How do I enable MSDTC on SQL Server?
Is this even a valid question? I have a .NET Windows app that is using MSTDC and it is throwing an exception:
6 Answers
...
Prompt Dialog in Windows Forms
I am using System.Windows.Forms but strangely enough don't have the ability to create them.
11 Answers
...
View not attached to window manager crash
...am using ACRA to report app crashes. I was getting a View not attached to window manager error message and thought I had fixed it by wrapping the pDialog.dismiss(); in an if statement:
...
How to export and import environment variables in windows?
...
On Windows 7 64-bit, if there are two identically named variables at the User level and the System level, this command gives precedence to the User level variable and omits the System level one. This behavior makes sense, but f...