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使用App Inventor扩展实现多点触控：Scale Detector · App Inventor 2 中文网
...身。
规模检测或扩展作为 Java 代码实现，编译和处理以生成 aix 文件，如 App Inventor 扩展中所述。 Java 代码文件 ScaleDetector.java 可在此处获得：
edu.mit.appinventor.ScaleDetector_src.zip
这段扩展代码只不过是 Android SDK 的 ScaleGestureDetector...
How to drop all tables in a SQL Server database?
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You can also delete all tables from database using only MSSMS UI tools (without using SQL script). Sometimes this way can be more comfortable (especially if it is performed occasionally)
I do this step by step as follows:
Select 'Tables' on the database tree (Object Explorer)
Press F...
How can I expand and collapse a using javascript?
...e created a list on my site. This list is created by a foreach loop that builds with information from my database. Each item is a container with different sections, so this is not a list like 1, 2, 3... etc. I am listing repeating sections with information. In each section, there is a subsection...
How to use LocalBroadcastManager?
... something programmers always have to guard against. As for modifying the GUI, you can store a state for when the activity is resumed, you don't have to modify the GUI.
– JohanShogun
Jul 26 '15 at 12:25
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How can I produce an effect similar to the iOS 7 blur view?
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Why bother replicating the effect? Just draw a UIToolbar behind your view.
myView.backgroundColor = [UIColor clearColor];
UIToolbar* bgToolbar = [[UIToolbar alloc] initWithFrame:myView.frame];
bgToolbar.barStyle = UIBarStyleDefault;
[myView.superview insertSubview:bgTool...
What is N-Tier architecture?
I've seen quite a few developer job postings recently that include a sentence that reads more or less like this: "Must have experience with N-Tier architecture", or "Must be able to develop N-Tier apps".
...
How to detect online/offline event cross-browser?
...you can hook into.
Here's a test page. It's beautiful/has a nice feedback UI by the way! :)
Offline.js Simulate UI is an Offline.js plug-in
that allows you to test how your pages respond to different
connectivity states without having to use brute-force methods to
disable your actual conn...
The Web Application Project […] is configured to use IIS. The Web server […] could not be found.
...mming question (and shouldn't really be posted here) but I've posted this guidance as it's a common problem, but the advice I've posted is generic; the commands I've listed are correct but the steps you need to do in IIS may vary, it depends on your version and your account privileges.
Good luck!
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How to check for an active Internet connection on iOS or macOS?
...ableFoo.reachableBlock = ^(Reachability*reach)
{
// Update the UI on the main thread
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"Yayyy, we have the interwebs!");
});
};
// Internet is not reachable
internetReachableFoo.unreachableBlock = ...
Mercurial (hg) commit only certain files
...repository containing "file_1", "file_2" and "file_3", the following are equivalent, but the latter is easier / faster to type:
hg commit file_1 file_2
hg commit -X file_3
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