OC-objective concepts and usage, oc-category concepts

OC-objective concepts and usage, oc-category concepts The previous article introduced the use of the @ class keyword in OC. First, let's take a look at the scenario. If we want to expand the functions of a class, what should we do? For

IOS: converting Chinese characters to PinYin (class method) and ios pinyin

IOS: converting Chinese characters to PinYin (class method) and ios pinyin I wrote an article about changing Chinese characters to PinYin before, and then I used it myself, and it was a little troublesome. Here, I directly write a class Method

Ordering System ideas and meal system ideas

Ordering System ideas and meal system ideasOrdering System ideas Step 1: Observe and implement the UIPickerView data source.Step 2: load the plist file and store the data in the NSArray array. -(NSArray *) foodArray { If (_ foodArray = nil ){ _

Android development artifacts (including various UI effects and instances) and Android ui are recommended.

Android development artifacts (including various UI effects and instances) and Android ui are recommended. There are many open-source Android class libraries on the Internet that are very useful. They are good learning objects for kids shoes or old

Network and mobile phone signal identification represented by mobile phone signals

Network and mobile phone signal identification represented by mobile phone signals Mobile phone signal G refers to GPRS, which is a 2G network Mobile phone signal E refers to the EDGE network, which is 2.75 GB. 3G mobile phone signal refers

Android converts an image into a black/white image

Android converts an image into a black/white image First, call the android system tool to obtain the image to generate a bitmap file, and then use the binarization Technology in android to convert the image into a black-and-white image. The main

Create https service in nodejs and create https in nodejs

Create https service in nodejs and create https in nodejsNodejs creates an https service by Wu xueyingServerr. js Var https = require ('https'); var fs = require ('fs'); var options = {key: fs. readFileSync ('. /keys/server. key '), cert: fs.

Android Baidu map sdk3.2 offline map package import, androidsdk3.2

Android Baidu map sdk3.2 offline map package import, androidsdk3.2 Some time ago, when I used Baidu map to import an offline map package, I found a problem. The offline packages downloaded from the Baidu official website cannot be imported, but I

Android AIDL practices: Clearing application cache, androidaidl

Android AIDL practices: Clearing application cache, androidaidl 1. Put the following two aidl files in your own project. Your project is regarded as a client for cross-process communication. The Code is as follows: Create package name: /*****

Open multiple applications at a time, open multiple applications

Open multiple applications at a time, open multiple applications I am a programmer who needs to open a lot of software every time he starts the system. Setting the software to start the system affects the speed of the system. What should I do?

Swift difficulties-detailed explanation of the constructor rule instances in inheritance, swift difficulties

Swift difficulties-detailed explanation of the constructor rule instances in inheritance, swift difficultiesConstructing Rules in inheritance is a challenge. If you have any questions, please leave a message to ask me.My Swift getting started

Detailed explanation of memory cache of Android image download framework UniversialImageLoader (3)

Detailed explanation of memory cache of Android image download framework UniversialImageLoader (3) The previous two articles focus on disk caching. This article focuses on memory caching. I also want to explain the memory cache in two articles. In

Android-click the button in the dialog box to not close the dialog box. android button

Android-click the button in the dialog box to not close the dialog box. android button Sometimes I do not need to click the button for some detection, but do not want to close the dialog box (the system click any button by default to close the

JFrame implements batch acquisition of the Android installation package security certificate MD5, jframeandroid

JFrame implements batch acquisition of the Android installation package security certificate MD5, jframeandroid Today, I met a requirement to obtain the MD5 of all apk signatures. Below is a tool I implemented using Java SE to paste the core source

In-depth analysis of Java I/O class features and application scenarios, in-depth analysis of application scenarios

In-depth analysis of Java I/O class features and application scenarios, in-depth analysis of application scenarios There are more than 40 classes related to input and output in Java. If the relationship between them is not clarified, they cannot be

Action effects in Cocos2d-X, Cocos2d-X action Effects

Action effects in Cocos2d-X, Cocos2d-X action Effects The Cocos2d-X provides a rich set of action Effects For example, grid Animation Distorted effects 3D tile fluctuation Effect Program code: # Include "ActionEffect. h "# include"

Android obtains cpu usage, remaining memory, and hard disk capacity

Android obtains cpu usage, remaining memory, and hard disk capacity 1. Memory Information Detailed memory usage is available in proc/meminfo. The memory information I obtain here is obtained from this file. after obtaining detailed memory

Android learning-in-depth analysis of Android Fragment

Android learning-in-depth analysis of Android Fragment People who have some experience in the interview have a deep understanding. Fragment knowledge is usually asked during each interview. So today I will share Fragment with you separately. How

Android Database Upgrade instance and android database instance

Android Database Upgrade instance and android database instance Part 1The SQLiteOpenHelper class of Andoird has an onUpgrade method. This method is triggered when the database is upgraded. After practice, I solved a series of questions: 1. What does

Android code obfuscation notes

Android code obfuscation notes After the apk for obfuscation is decompiled, the name and class names in the Code are changed to abcd, which is hard to understand. Use code obfuscation, enable obfuscators, edit related files, and then package the

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