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
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 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.
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
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
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 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
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
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
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 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)
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
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
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
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
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
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
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
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
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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