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Can an Android NFC phone act as an NFC tag?
...ment might require the hardware vendor or some other person to verify your app / give it permissions to access the secure element. It's not as simple as creating a regular NFC android app.
More details here:
http://www.mail-archive.com/android-developers@googlegroups.com/msg152222.html
A real qu...
How do servlets work? Instantiation, sessions, shared variables and multithreading
...tainer (like Apache Tomcat) starts up, it will deploy and load all its web applications. When a web application is loaded, the servlet container creates the ServletContext once and keeps it in the server's memory. The web app's web.xml and all of included web-fragment.xml files is parsed, and each &...
How to use Morgan logger?
...sponses and related data. When added as a middleware to an express/connect app, by default it should log statements to stdout showing details of: remote ip, request method, http version, response status, user agent etc. It allows you to modify the log using tokens or add color to them by defining 'd...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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What does addChildViewController actually do?
...2011 videos and Mr. View Controller, Bruce D. Nilo, said this:
viewWillAppear:, viewDidAppear:, etc have nothing to do with addChildViewController:. All that addChildViewController: does is to say "This view controller is a child of that one" and it has nothing to do with view appearance. When t...
Using SSH keys inside docker container
I have an app that executes various fun stuff with Git (like running git clone & git push) and I'm trying to docker-ize it.
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How to check if a user likes my Facebook Page or URL using Facebook's API
...y want to check if a user has liked my page with javascript in an iFrame app.
5 Answers
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Can't launch my app in Instruments: At least one target failed to launch
I have all my code signing entitlements set correctly. Running the app on my phone is fine, but launching it in instruments gives me an error message:
...
Android disable screen timeout while app is running
Is there a way to disable the screensaver while my app is running?
12 Answers
12
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Waiting until two async blocks are executed before starting another block
...e, "Waiting on Groups of Queued Tasks" in the "Dispatch Queues" chapter of Apple's iOS Developer Library's Concurrency Programming Guide
Your example could look something like this:
dispatch_group_t group = dispatch_group_create();
dispatch_group_async(group,dispatch_get_global_queue(DISPATCH_QUE...