GCD first, Brief introduction 1. What is GCD?
The full name is Grand Central Dispatch, which translates as "the backbone scheduler"
Pure C language, provides a lot of powerful functions
Advantages of 2.GCD
GCD is Apple's
View in Android is not thread-safe, so if you update a UI control in the main thread directly in a new one, the following error is reported:Android.view.viewrootimpl$calledfromwrongthreadexception:only the original thread that created a view
Without its own streaming media server, and want to use the native video player MPMoviePlayerController in the app to insert video into the interface, the interface can be played directly, or full-screen playback, can be achieved by the following
PS: Cheap server but will be the occasional pit you.Today you are modifying some of the app's interactions and refactoring your code. Everything is so smooth, PA pa, runing, Test no problem, and then snapped ...Suddenly, when the test upload avatar,
Recently wrote the RPG, found in the role of the movement of the object can still be a lot of mathematics before the knowledge (manager of all kinds of tangled brain repair), long time no blog, hot summed up the algorithm ideas, lest oneself after
1. In Colors.xml, add two item. Note that the label for these two item is , not !name="Primary_green" > #8cb800 drawable>name="Gray" > #C2C2C2 2. Add Txt_color_green_gray.xml in drawable. android:color instead of android:d rawable.
Transferred from: https://university.utest.com/how-to-set-up-your-first-android-automation-project-with-appium/Appium is a open-source tool for automating native, mobile web, and hybrid applications on IOS and Android platforms. Native apps is those
This is a "if there is a similar, purely coincidental" story, plus some nonsense, please do not seat. Here we go......
I am somewhat embarrassed to hold a cup of water, is sitting opposite the king of the visit, he is in other places to fight
Android Resource File Categories:
Android resource files can be broadly divided into two types:The first is stored in the Res directory.resource files that can be compiled:This resource file system will automatically generate the ID of the
this year1China Medical and Materials Association, the pharmaceutical e-commerce branch theChina Medical Internet Development Report shows that the current domestic mobile medicalAPPhas reached -variety. According to the Analysys database, last year,
Reprint please indicate source: http://blog.csdn.net/lmj623565791/article/details/40481055, this article from: "Zhang Hongyang's Blog"Most of the content in this article is translated from: http://www.doubleencore.com/2013/06/context/I have
When the Android development process involves the operation of the database, we usually need to export the app's database file (i.e., *.db file) to verify that the database additions and deletions are correct.Because the real machine does not have
The ability to destroy data and remote lock screens is achieved by obtaining device Administrator privileges1. First create a class that inherits Deviceadminreceiver. Look at the class name and you'll guess it's probably a broadcastreceiver. Make
diskspacetool.h// screenrecordmaster//// Created by Feimo on 15/7/24.// Copyright (c) 2015 Feimo. All rights reserved.//#import #include #include @interface diskspacetool:nsobject+ (nsstring *) freediskspaceinbytes;//Phone remaining space +
Implementation logic:
The user clicks the OK button of the dialog box, jumps the page to determine whether the user has previously set up the mobile phone anti-theft function
If set, jump directly to the anti-theft page
If not set,
Say a recent upload app through, now Apple's audit team efficiency has improved a lot, basically is in 7 days can have results, after all, there are so many apps queued for review every day. The email that found the audit reply was in the wee hours
The main point is to pay attention to the customer service to the server when the request, in the request header is able to set the server to return the data from where to end.When the server responds to the client, it can get the exact type and
The ADB shell is often used during the development of Android applications, where a simple summary of the general commands is made.The content includes DOS, Linux, Shell three blocks (obtained through access to books and web data).1. First look at
0. Write at the frontI refer to An Xiaohui Warrior's blog post, did the QT on Android GSP related experiments, in order to back a rainy day, so record down.1. Qt on Android GPS system flowFigure 1. System flowchart1, the system includes two levels:
URL Special character processingIn general, when we call WebView, as long as the WebView pass a URL, in the Web page can display information. But when we pass URLs that are troublesome or with characters, we need to escape special characters when we
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