When is viewwillappear and viewdidappear of the IOS View Controller called?

From: http://stackoverflow.com/questions/5277940/why-does-viewwillappear-not-get-called-when-an-app-comes-back-from-the-backgroun When Will viewwillappear and viewdidappear be called? Q: When I press a View Controller Into A

Error about iOS 5 cocould not instantiate class named nslayoutconstraint

Because xcode 4.6.2 is used, SDK 6.1 is used when a new project is created, but it must be adapted to a lower version. This error occurs when the IOS simulator is selected as 5.0 during compilation and running.Cocould not instantiate class named

IOS development based on Baidu map (2) -- getting poi

1. Search first Cllocationdistance radiusmeters = 1000; // set the search range bmksearch * search = [[bmksearch alloc] init]; // create a search object search. delegate = self; // The proxy is set to itself. After searching, the function

One way to actively exit IOS applications

The iPhone SDK only provides the following APIs to exit the application: [CPP] View plaincopy Exit (0 );   However, if this method does not have the animation effect, you can exit the program directly, giving the user the feeling that the

IOS performs this operation at intervals in the background.

Steps: 1. Add the uibackgroundmodes key to info. plist. The value is an array and one of the arrays is a VoIP string: uibackgroundmodes VoIP 2. Call the-(void) setupbackgroundhandler function when the program starts. The function body is as

IOS executes the specified action after being idle for a period of time (the user has no action)

Original article: http://stackoverflow.com/questions/8085188/ios-perform-action-after-period-of-inactivity-no-user-interaction 1. Create an objective-C class and inherit from uiapplication. 2. Edit. h as follows: # Import // Define the application

How does IOS reverse engineering work? -Self-Knowledge

From: http://www.zhihu.com/question/20317296 I'm lucky to be invited to answer this question, but I don't know how deeply you want to know about the 'System system?According to the intention and depth, there are several ways and resources:To learn

IOS-uiview add Click Event

========================================================== =============================== Original blog, reprinted please declare the source of Electronic coffee (original id blue rock) ========================================================== ====

Interaction between unity3d and IOs (1)

Interaction between unity3d and IOs (1) Today, we will introduce the first part of interaction between unity3d and IOs: transmitting messages from IOS to unity3d. Let's start: 1. First, use unity3d to create a plain, and adjust the camera angle

Windows 7 IOS Installation Development Environment Summary (vmware9.0 + VMware patch + DMG image + xcode)

My Computer ConfigurationCPU: Intel-core I3 ProcessorMemory: 4 GBHard Disk: 1 TbSystem: win7 32-bitInstallation steps:1. Install the Virtual Machine VMware Workstation 9.0.2. Install Virtual Machine patches.By default, vmwarevm does not have the MAC

Enable IOS emoji for programming

Emoji is a one-character set developed by Japanese (do not buy Japanese products, support Chinese products, hate Japanese men, haha) and is integrated into IOS. You can activate emoji by programming. First, determine whether emoji is supported: -

IOS-response to the upper, lower, and left sliding gestures

-(Void) viewdidload { Uiswipegesturerecognizer * recognizer; Recognizer = [uiswipegesturerecognizerAlloc] initwithtarget: SelfAction: @ selector (handleswipefrom :)]; [Recognizer setdirection uiswipegesturerecognizerdirectionright)]; [[SelfView]

Exit iOS app

The OS SDK provides the following APIs to exit the application:  IOS code Exit (0 );   However, if this method does not have the animation effect, you can exit the program directly, giving the user the feeling that the program has exited due to

Getting started with iOS development: real machine testing

After successfully joining the IOS Developer Program, the developer must first perform a real machine test. The following describes how to implement a real machine test. The following describes how to test a real machine, as shown in: In general,

IOS developer _ iPhone developer _ file system nsfilemanager _ How to create, rename, and delete files

Original article: http://blog.sina.com.cn/s/blog_947c4a9f0100z34f.html Nsfilemanager contains methods for querying single dictionary directories, creating, renaming, and deleting directories, and obtaining/setting file attributes (readability,

IOS app packaging IPA real machine debugging and publishing process

1. Commissioning of a real machine 1. log on Http://developer.apple.com/iphone/index.action Click the first entry. Select the first certificates Click here to download an applewwdrca. Cer instance. 2. After the download is complete,

Powerful UI modification tool in iOS 5-uiappearance

Ios5 provides a powerful tool, uiappearance, to easily unify your interface. It provides the following two methods: + (ID) Appearance + (ID) appearancewhencontainedin :( class <>)Containerclass ,... The first method is to unify all the changes. For

Xmppframework iOS development (5) Getting friend information and adding and deleting friends

Original address: xmppframework iOS development (5) Getting friend information and adding and deleting friends Friend list and friend business card [_ Xmpproster fetchroster]; // obtain a friend list // obtain a friend node-(void) xmpproster :(

Notifications for new iOS messages-sound and Vibration

I. apns 1. Registration [[UIApplication sharedApplication] registerForRemoteNotificationTypes:UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert]; 2. server push (Java) Pushnotificationpayload payload =

IOS development-replacing udid with keychain

Apple has banned UUID applications since January 1. So we need to replace it with some methods. Below I will replace the uuid with the keychain access. For the keychain application, Apple provides an example program named generickeychain. Here:

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