IOS

During development, we often need to save some configuration information. Generally, NSUserDefaults [plain] [[NSUserDefaults standardUserDefaults] objectForKey: key]; [[NSUserDefaults standardUserDefaults] setObject: aObject forKey: key];

Question: give n currencies, exchange relationships in m, give two currency exchange rates and service fees, and find out whether the exchange between currencies can increase wealth. Use Bellman_Ford to determine whether there is a positive ring. If

Author: Sun Dongfeng)   In the development of iPhone network communication programs, it is inevitable to use Socket sockets. The iPhone provides the Socket network programming interface CFSocket, but I prefer BSD Socket.   The header files required

Start-up development of a Weibo client on the iphone. Although there are already many very good clients, I still want to repeat the wheel. The main purpose is to train my hands, this project has more meanings. First of all, object-c is newly learned,

When I saw a friend who was just developing the iPhone software asking a lot of questions, I actually encountered the same problem. So I took the time to summarize the problems that I could think of or encountered, you can give yourself a memo or

TagLib is a useful C ++ function library for KDE open-source projects. It can be used to read ID3 information of songs in various formats, such as Song names, singers, and albums.The TagLib of version 1.5 supports MacOS. You can use TagLib in Cocoa

The previous article introduced how to define UIViewController without using the XIB file. In this case, UIButton is automatically created instead of XIB files. Through this section, we can learn how to use the addTarget method of UIControl and

Today we will talk about some things of UIScrollView. This drag-and-drop component is often used in both application and game development, so we must be more familiar with it. Let's get started. (1) initialization Generally, you can use alloc and

By Matt Long Address: http://www.cimgf.com/2010/01/28/fun-with-uibuttons-and-core-animation-layers/ At first glance, UIButton basically does not provide what you want from the customization perspective. Therefore, when programmers use IB to set the

// Animation. h# Import "Box2D. h"# Import "cocos2d. h"# Import "BYSingle. h"@ Interface AnimSpriteFactory: NSObject {BYSingle * _ single;BOOL _ is4g;BOOL _ isIpad;} -(Id) init;-(CCSprite *) genAnimSprite :( CGPoint) positionAnimName :( NSString *)

The use of tableView mainly processes code 1. Create a UIViewController page and double-click the xib file to open the Layout View.2. Drag the Table View in the Libery view to the View window.3. Click Tableview, control + F2 in view to associate

CoreData is the core framework related to databases in iOS development, but it is a little troublesome in the case of multi-threaded processing. There are three official methods 1. Each thread has an NSManageObjectContext 2. There is only one

About Connection  Connection is also a new concept for me. My understanding is as follows: The nib file contains all interface objects, but these objects respond to user operations in. in the m file, a mechanism is required to set the object and.

No one in the group will use the IPHONE version of the APP. After all, the IPHONE development is very difficult for students, mainly because of the hardware cost. a mac computer costs more than 10 thousand, children of ordinary people cannot afford

Now here is the question: How much memory does the iPhone have? How much memory is OK for applications to use? Curious as I am I did some research and wrote a little test project. This got me some odd results.According to what you find on the net

During network programming in Objective-c, you often need to convert the data into URLEncoding encoding. For example, After coding the pair + code, it is changed to % 2b. Here we provide an implementation. [Cpp] // NSString + URLEncoding. h# Import@

    What is ARC? Automatic Reference Counting, the Automatic Reference Counting, that is, ARC, is the biggest change and most exciting change introduced by WWDC2011 and iOS5.   ARC will automatically help you add retain and release/autorelease

1 PrefaceIn the first two chapters, we introduced GCD and Block. This time, we will combine the two to see how much effect they will achieve after their combination. Let's wait and see! 2. DetailsDo you still remember the previous SlowWorker project?

It is found that when an application Slide left or right on the page of itouc4or pushes a View Controller, It is very stuck. At last, it was discovered that the border of the navigation controller was added with a shadow. Previous Code: -(Void)

Overview NSFileHandle class is an object-oriented encapsulation of a file description. You can use a file handle object to access data related to files, sockets, pipelines, and devices. You can read and write files. For sockets, pipelines, and