ios programming for dummies

dispatch_once_tOncetoken;dispatch_once(oncetoken, ^{//code to be executed once});//Delay 2 seconds Execution:DoubleDelayinseconds =2.0;d ispatch_time_t poptime = Dispatch_time (Dispatch_time_now, Delayinseconds * nsec_per_sec);d ispatch_after (PopTime, Dispatch_get_main_queue (), ^ (void){//code to being executed on the main queue after delay});Dispatch_queue_t can also be defined by itself, if you want to customize the queue, you can use the Dispatch_queue_create method, an example is as follo

the root element of the JSON is an array, it returns a list of models.Shallow Injection Demo sampleSuppose we have JSON like the following. To be injected into the usermodel.{ "id100075, "name"Greedy", "birthday"1993-03-06", "isViptrue, "partners[100236, 100244, 100083]} @interface usermodel : nsobject @property(nonatomic,Assign) int64_t UserId;@property(nonatomic, copy)NSString*name;@property(nonatomic,Strong)NSDate*birthday;@property(nonatomic,Assign)BOOLISVIP;@property(nonatom

Sethostname:server]; [_xmppstream sethostport:5222]; Nserror *error = nil; if (![ _xmppstream connectwithtimeout:3.0 Error:error]) { NSLog (@ "%@", Error.userinfo); } return YES;} -(void) setupstream{ _xmppstream = [[Xmppstream alloc] init]; [_xmppstream adddelegate:self Delegatequeue:dispatch_get_main_queue ()]; }The following is a successful callback for the connection. The password is verified in the following steps:-(void) Xmppstreamdidconnect: (Xmppst

directory chant. Simply think, the network address of some special fields to replace the OK, such as "/" Replaced by "_" can achieve the purpose of the mapping. or directly in the case of direct transactions to save to local, OK, but this will bring other uncertainties (the length of the network address, if the strategy is not well-developed, will not appear the problem of cache confusion. Issues such as the inability to implement the cache for a short time). My approach is to connect the netwo

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: - (BOOL)supportEmoji{BOOL hasEmoji = NO;#define kPreferencesPlistPath @"/private/var/mobile/Library/Preferences/com.apple.Preferences.plist"NSDictionary *plistDict

Programming with iOS8 from scratch [common controls for iOS development] And ios8ios Master haomeng is devoted to his contribution and respects the author's Labor achievements. Do not repost them. If the article is helpful to you, you are welcome to donate to the author, support haomeng master, the amount of donation is free, focusing on your mind ^_^ I want to donate: Click to donate Cocos2d-X source

IOS Socket programming I. Various network protocols: TCP/IP, SOCKET, HTTP, etc.The layer-7 network consists of the physical layer, data link layer, network layer, transmission layer, Session Layer, presentation layer, and application layer.The physical layer, data link layer, and network layer are usually called media layers, which are the objects of network engineers;The transport layer, Session Layer, pre

Network Programming for iOS development-6. NSURLSessionConfiguration notes, nsurlsession The NSURLSessionConfiguration object is used to initialize the NSURLSession object.Expand the alternative scheme related to NSMutableURLRequest at the request level. We can see that NSURLSessionConfiguration provides a considerable amount of control and flexibility for generating requests for sessions. From network a

NSOperation and nsoperation for iOS multi-thread programming There are two NSOperation methods: 1>. NSInvocationOperation: creates an operation and points it to the executed code segment with selecter. 2>. NSBlockOperation: Create an operation and place the executed code in the block. 1. NSInvocationOperation multithreading method: Creation method: - (void)invocationOperation {NSInvocationOperation *operat

IOS programming-Network Monitoring In network applications, You need to monitor the network status of your devices in real time for two purposes: (1) let users know their network status and prevent misunderstandings (for example, the application is incompetent) (2) Smart processing based on the user's network status, saving user traffic and improving user experience WIFIG Network: Automatically downloads H

Network Programming for iOS development -- get the MIMEType and iosmimetype of the file Sometimes we need to obtain the MIMEType information of the file. The following describes how to obtain MIMEType. 1. Search for the keyword "MIMEType" in Baidu directly. You will find it and check it: 2. Use the code to obtain the MIMEType information of the file: 1 # import "GetMIMEType. h "2 3 # import Run: Github

(resolveconflict :) name: uidocumentstatechangednotification object: Nil]; ②} // file conflict resolution-(void) resolveconflict :( nsnotification *) Notification {If (_ myclouddocument _myclouddocument.doc umentstate = uido Cumentstateinconflict) {③ nslog (@ "conflict occurred"); // document Conflict Resolution Policy nserror * error; If (! [Nsfileversion removeotherversionsofitematurl: _ myclouddocument. fileurl error: error]) {④ nslog (@ "remove other documents: % @", [error localizedfailu

picture, positionSubView. frame = cgrectmake(100.0, 150.0, 200.0, 160.0); //Finish animation move[uiimageview commitanimations]; //Add a picture to the View subview[self. View addsubview: SubView]; }-(void) didreceivememorywarning { [Super didreceivememorywarning]; //Dispose of any resources, can be recreated.}@end(6) SimulatorThis article originated from the online blog tutorial, after I modified and tested. Original Blog Address http://blog.sina.com.cn/s/blog_5fae23350100dvx9.h

| Kcfcalendarunitminute| Kcfcalendarunitsecond) fromdate: now]; Nsinteger hour = [datecomponents hour]; nsinteger min = [datecomponents minute]; Nsinteger sec = [datecomponents second]; SEC = -sec; min = -min; hour = hour; Countdownlabel. Text = [nsstring stringwithformat:@ "%ld:%ld:%ld", hour,min,sec]; }@end(3) UIView interface settings-Black backgroundClick Main.storyboardSelect View Controller->viewSet the background to blackSelect Attributes Inspector->background->bl

[Mgr setreachabilitystatuschangeblock:^(afnetworkreachabilitystatus status) {9 //Call this block when the network state changesTen Switch(status) { One CaseAfnetworkreachabilitystatusreachableviawifi: ANSLog (@"WIFI"); - Break; - the CaseAfnetworkreachabilitystatusreachableviawwan: -NSLog (@"bring your Own network"); - Break; - + Caseafnetworkreachabilitystatusnotreachable:

) theUiview.setanimationduration (2.0)//Set Animation time -Self.testimageview.transform=cgaffinetransformrotate (Self.testImageView.transform, CGFloat (-m_pi/2)) $ uiview.commitanimations () the the //independent rotation, rotated at the initial position the //self.testimageview.transform=cgaffinetransformmakerotation (CGFloat (M_PI/6)) the } - in //catransition Animations-zooming the @IBAction func cascale () the { About the //Continuous Scali

flipanimation ()Panax Notoginseng { - uiview.beginanimations (Nil, Context:nil) theUiview.setanimationduration (1.0)//Set Animation time +Uiview.setanimationtransition (Uiviewanimationtransition.flipfromleft, Forview:testimageview, cache:true) A //uiview.setanimationtransition (Uiviewanimationtransition.flipfromright, Forview:testimageview, cache:true) the uiview.commitanimations () +}Create two views1 //over-animation add two views2Redview = UIView (Frame:cgrectmake ( $, -, -, -))

Synchronous get Mode1 //MARK:-Synchronous Get Mode2 func synchronousget ()3 {4 //Create a Nsurl object5var url:nsurl! = Nsurl (string:"http://m.weather.com.cn/data/101010100.html")6 7 //Create Request Object8var urlrequest:nsurlrequest = nsurlrequest (Url:url, CachePolicy:NSURLRequestCachePolicy.UseProtocolCachePolicy, timeOutInterval:Ten)9 Ten //Response Object Onevar response:nsurlresponse? A - //Error Object -var error:nserror?

IOS network programming-Day5 (enable Apache with MVC)1. Use xml to retrieve data 1. Write the root node of the tree structure of the xml file (1).

NSOperation for iOS multi-thread programming There are two NSOperation methods: 1>. NSInvocationOperation: creates an operation and points it to the executed code segment with selecter. 2>. NSBlockOperation: Create an operation and place the executed code in the block. 1. NSInvocationOperation multithreading method: Creation method: - (void)invocationOperation {NSInvocationOperation *operation1 = [[NSInvoc