data logger app

One, the iOS application common data storage way1.plist (XML attribute list archive) 2. Preferences 3.NSKeydeArchiver Archive (store custom objects) 4.sqlite3 (database, relational database, cannot directly store objects, to write some database statements, to disassemble the object storage) 5.Core Data (Object-based database, block internal links)second, the application of sand boxEvery iOS

pre-set a good bell.4, custom adapter. Previously used by the system to provide the adapter, in this app, the music player module does not seem to be good.5, background. How to choose a good background picture, natural, coordinated, creative, this is a difficult point.6, transduction. Picture selection is not very good, the pictures on the web are not too conform to the specifications, and then distortion after narrowing, this is a problem.Finally, t

"Android" Android mobile app data to SDYou can specify it in the application's Menifest file, include the Android:installlocation attribute in the ... >Android:installlocation also has two additional attribute values: "Preferexternal" and "Auto", which, according to the literal meaning, may also understand what it means, or the following:If you define "preferexternal", it means that you require your

development of embedded system applications to the configuration of Azure to get the data we are divided into 3 major steps, the following will be described separately:./Configure Azure Environment./Add device and send information to IoT hub./Toradex Embedded System Application Development2). Configure the Azure environmentYou first need to create a new Azure account: From the Azure website you can request a free account for 30 trial. You can then us

About crawlers, began to think that only crawling web data, and then know that the app can crawl. As a result, the use of idle time in schools took two weeks to achieve data capture and simple data analysis.Goal, crawl Super Curriculum XX University (in fact, it is our university ...) ) Students 20,000 post information

Before the CSDN program in the life of the public to see this article "Evil not pressure positive" rating continued lower, tens of thousands of comments revealed, is to save Jiang Wen or save the audience? , the article mentions the data interface for the comments found through the grab-cat-eye app: Http://m.maoyan.com/mmdb/comments/movie/248566.json?_v_=yesoffset=1, 248566 of them belong to the film's excl

Check the data table of the App without the root user. For a long time, you have to use root to view sqlite databases. However, it is troublesome to use root on many testing machines in the company ~~~ Recently, the project went live, just a little idle, So I decided to write a library project to facilitate future code debugging. The key code is as follows: 1. view the database of the current

How iOS app data is stored (preferences)First, Brief introductionMany iOS apps support preferences such as saving usernames, passwords, font size, and more, and iOS offers a standard set of solutions to add preferences to your appEach app has a Nsuserdefaults instance that accesses preferences. For example, save the user name, the font size, whether to log on aut

the app, the invitation code is automatically passed to the user, and after the user opens the app, the invitation code is processed in the background to enable the installation of the free invitation code.Advantages: "App Invitation Registration Award" This kind of activity with invitation mechanism, is one of the important promotion means of

Demand:1. The app does channel promotion needs to package the channel information into the app for different channels, then it can be downloaded to statistic data, need to hit multiple channel packages2. When you share a promotion, you need to hit multiple packages for different sources of sharing.Ideas:It takes time and energy to hit more than one package, so if

Just to a new company, the company's project is mainly to do the app, the data on the app is mainly through the call of the Web backend data interface, but has never been exposed to the interface, the previous thing is to write in the Web spooler code, and then displayed on the page, Now suddenly I touch the interface

Windows Server R2 Super Virtualization Nine data center walk app Controller R2APP Controller provides a general self-service experience that can help you easily configure, deploy, and manage virtual machines and services within your private and public clouds. Note App Controller R2 can only connect to SCVMM R2DescriptionApp Controller 20,121 installs the same con

How iOS app data is stored (XML attribute list-plist)One, the iOS application common data storage way1.plist (XML attribute list archive) 2. Preferences 3.NSKeydeArchiver Archive (store custom objects) 4.sqlite3 (database, relational database, cannot directly store objects, to write some database statements, to disassemble the object storage) 5.Core

In development, we often use multithreading. When you use multithreading to access the same data, you may accidentally crash. As follows: Workaround:1. Add lock= Since this object's properties are non-thread-safe, the lock makes it thread safe. You can customize a lock for each object, or you can directly use the attribute indicator atomic supported in OC: @property (atomic) Nsarray *arr; This will not worry about multi-threaded simultaneous reading

AppStore There are many application icons are ugly common, but just as many people download, the reason is actually very simple: users feel good (or play up cool, entertaining high)So if you (or your team) do not have a good art at the moment, but also in your good at the process and technology more up and down, plus if the Lite free version to promote, the effect will be better focus or grasp the "core user" needs, find your application " Positioning "and then firmly towards this goal of conti