IOS

Swift Tour Summary (3), swifttour About Optional Control Flow If let constantName = someOptional { Statements } If the Optional is nil, if is not entered; otherwise, the execution and constantName are the value of the Optional. Example: If let

IOS development-bottom layer-Class explanation, ios bottom layer-class explanation Objective-c is iOS's development language. its true face is that it is not a real object-oriented language, and abstract understanding is just about it. In fact, it

NSString initialization and memory management, nsstring Initialization 1. NSString three initialization Methods A. Direct Value assignment: NSString * str = @ "a string", which uses constant memory. B. Use the class method: NSString * str =

IOS checks whether the app has the permission to use the camera. IOS checks whether the app has the permission to use the camera. NSString * mediaType = AVMediaTypeVideo; AVAuthorizationStatus authStatus =

Objective-C basics 1: class inheritance and combination in OC, objective-coc 1. Class Definition and Declaration The class declaration in OC ends with @ interface and @ end. The class definition in OC starts with @ implementation and ends with @ end.

Third-party database used by databases FMDB and third-party fmdb Download FMDB   1. introduce the sqlite3 toolbox and introduce header files in the class for database operations: because third-party software also uses the sqlite toolbox to operate

Ios album operation ALAssetsLibrary 1. The ALAssetsLibrary instance provides us with the function of getting pictures and videos in an album (photo app. In ios8 photos framework, ALAssetsLibrary is replaced. When using ALAssetsLibrary, We need to

[IOS UI advanced, iosui advanced1. UIView transition Animation   1 // 2 // ViewController. m 3 // UIViewAnimationTest 4 // 5 // Created by hellovoidworld on 15/1/16. 6 // Copyright (c) 2015 hellovoidworld. all rights reserved. 7 // 8 9 # import

Handling iOS detection version updates If we want to detect updates to the app version, we must obtain the version information of the currently running app version and the latest version released on the appstore. The current running version can be

IOS custom control progressView (ring progress bar) When I was working on a project, I used a ring progress bar. First I found a third-party control on the Internet and found that it is easy to use, that is, there are too many things and it is a bit

Use TouchID verification and ios8touchid verification in ios8. In iOS8, developers can use APIs that open the Touch ID permission to third-party applications so that they can use Fingerprint Authentication in applications to complete user

Singleton implementation (Singleton macro), implementation (macro) 1. What is a Singleton? A singleton is a class. Each creation is the same object. That is to say, it can only be instantiated once. 2. How to ensure that each creation is the same

CocoaAsyncSocketDemo, cocoaasyncsocket Engineering Drawing:   Code: ViewController. h # Import // Add the header file # import "AsyncSocket. h" @ interface ViewController: UIViewController @ end   ViewController. m -(Void) viewDidLoad {[super

Magical record (based on coredata) for ios data persistence) After seeing magical record, I tried it and found it useful, Magic Record is an open-source class library written by Saul Mora to make Core Data easier to use. The development of this

IOS UIWebView cannot determine the actual height of the web page @ Interface IndEditorDetailViewController () {UIWebView * _ webView; progress * _ progressView; NJKWebViewProgress * _ progressProxy;} @ end @ implementation progress-(void)

IOS-integrated game center (leader board) The leader board in the game center has been used again recently. In fact, this is very simple, but it is easy to forget. So I plan to write it down. Create an app on iTunes Connect and enable game

IOS client Coding project record (2): ios client coding project 9: third-party plug-ins JSON object conversion: jsonModel registry.20.https://github.com/cewendel/swtableviewcellimg plug-in :mwphotobrowser ?### https://github.com/jdg/mbprogresshud 10:

IOS development-Object-C Block implementationWe can regard Block as a closure function, which can access external variables and local variables, but the external variables cannot be modified by default. You can use it for callback, which is more

IOS Mobile Phone Number Regular Expression (full)/* Verify the mobile phone number modified by helensong */-(BOOL) isMobileNumber :( NSString *) mobileNum{ /*** Mobile phone number* Move: 134 [0-8], 135,136,137,138,139,150,151,157,158,159,182,187,188

IOS NSURLSession, iosnsurlsession 1. NSURLSessionDataTask 1 // determine URL 2 NSString * urlStr = @ "http: // localhost/try"; 3 urlStr = [urlStr encoding: NSUTF8StringEncoding]; 4 NSURL * url = [NSURL URLWithString: urlStr]; 5 6 // confirm request 7