IOS

Three random number methods in iOS and three random numbers in ios Ios has the following three random number methods: // The first srand (unsigned) time (0); // the random number generated each time without adding this sentence does not change int I

IOS determines that NSString only contains numbers // Determine whether it is an integer:   -(BOOL) isPureInt :( NSString *) string { Ns‑* scan = [ns‑scannerwithstring: string]; Int val; Return [scan scanInt: & val] & [scan isAtEnd]; } // Determine

IOS development skills (1)This series of articles simply summarize some of the skills in the development process for future reference. ExclusiveTouchexclusiveTouch is an attribute of UIView. Exclusive means "Exclusive", so the function of this

IOS-target-action Design Mode   IOS-target-action Design Mode   The essence of the target-action design pattern is to call the target action Method for events generated in the host.   Next we use a UIView to implement the UIButton click

Singleton design mode and IOS design mode in IOS The Singleton design mode is a very important and common design mode in IOS development. It is designed to always return an instance regardless of the number of requests, that is, a class has only one

Delegate between two viewcontrollers in iOSThe second interface transmits values to the first InterfaceSecond Interface   // Configure the protocol on the Second Interface @ Protocol ChuanZhiDelegate -(Void) chuanzhid; @ End @ Interface

How to Use nsicationicationcenter in the notification centerNSNotificationCenter(Notification center) Note]The observer needs to be removed from dealloc. Obtain the notification center singleton object Nsicationicationcenter * center =

APNS remote PUSH notification PUSH deviceToken and apnsdevicetokenThe server pushes messages to the client: when the application is pushed to the background, or it is not running at all (our code is powerless)In this case, the application wants to

IOS. UI advanced. UITouch touch and UIGesture gesture. 02. responder object, responder chain, ios. uiuigesture Target audience: The responder object is an object that can receive and process events. UIResponser is the base class of all the

Ios development-commonly used macro definition (partial conversion), ios 1. When release is enabled, the log is blocked.C code # If defined (DEBUG) & DEBUG = 1 # Else # Define NSLog (...){}; # Endif #if defined (DEBUG) && DEBUG == 1#else#define

IOS network image loading framework (4 methods in total) Framework name: UIImage + WebCache. h inherited from UIimageView In the framework, there are four methods for loading network images: 1. normal loading 2. Thread NSThread 3.   # Import

IOS local notification# Import "AppDelegate. h"@ Interface AppDelegate ()@ End@ Implementation AppDelegate-(BOOL) application :( UIApplication *) application didfinishlaunchingwitexceptions :( NSDictionary *) launchOptions {// If you have been

Reading Notes-Web development for IOSWeb Development  The main request method is Get request: the data is in the URL in plain text, the data volume is small Post request: the data size is not limited to HEAD request: Request Header

KVO enables display of custom file copy progress and kvo custom progress 1. Create a file 　　Description: Custom file class. File Creation and copy are implemented through NSFileManager and NSFileHandle. To control the concurrent

Methods for obtaining the paths of documents, tmp, app, and Library, tmpapp The phone Sandbox Model contains four folders: documents, tmp, app, and Library.1, DocumentsYou should write all application data files to this directory. This directory is

Difference between dequeueReusableCellWithIdentifier and dequeueReusableCellWithIdentifier: forIndexPath, -(Id) dequeueReusableCellWithIdentifier :( NSString *) identifier; // Used by the delegate to acquire an already allocated cell, in lieu of

IOS development-Stage 3-Weibo (5) (Program 2) and ios Stage 3   Design Concept: Design Code according to MVC New ZYLoginWebView inherits from UIView Add the webView attribute in ZYLoginWebView. h. Create the webView Initialization Method in

IOS development -- Stage 2 -- operations on cells (1) (passing values on cells), ioscell TableView: When you click the button on the Cell, alertView is displayed, and the Cell title on the row where the button is located is displayed;   As shown

IOS: converts a json string to a dictionary and a json string to a dictionary. /*! * @ Brief converts formatted strings in JSON format to dictionaries. * @ Param jsonString string in JSON format * @ Return returns the dictionary. */ + (NSDictionary *

Ios multi-thread operations (11)-advanced NSOperation operationsNSOperation can call the start method to execute tasks. By default, NSOperation is executed synchronously. If you add NSOperation to NSOperationQueue, the system automatically performs