single app kiosk mode

Today, I'm going to talk about a technology that has been settling for a long time, design patterns. Here is the first article, is an introduction, talk about my years to learn the design patterns of the mental process.ADesign patterns and data structures, in the daily development work, whether it is the app or back-end Java development, are very practical, it is necessary to firmly grasp the two basic skills.I am not trained, so I first contact desig

Le back to the app mode to develop Le back to the mall system (micro or electric 158.1500.1390 yang) le back system development, le back mode development system, le back to the mall system development, le rebate mode custom development, Le back app development, le back

A singleton pattern is often used in objective-c. The most common are:[UIApplication sharedapplication]. DelegateThe sharedapplication here is a way to return the singleton. The so-called Singleton pattern is the only object of this class in the entire app, or software. You can save some global settings and other data to achieve a single object changes the entire app's settings are updated effect.Ignore the

create another TCP socket which are focus on ' awake ' your application, and from my personal experience, it ' s V Ery hard-to-keep this ' awake ' signal and the real SIP control signal Synchronize, the application always miss the SIP Invi Te request.so,the best-separating the SIP control single from the UDP data socket, make it as a TCP socket, the Best solution, but never use TCP sockets to transfer voice data.another dirty way:keep the application

/** 5 * Description: (1) static variable, save global instance, bind to class, independent of Object6 * (2) Private attribute, in order to avoid calling class name directly outside of class:: $instance, prevent null7 */ 8 Private Static $instance; 9 Ten /** One * Description: Database connection handle A */ - Private $db; - the /** - * Description: Privatization of constructors to prevent external instantiation of objects - */ - Privat

Singleton mode (duty mode):Simply put, an object (before learning design patterns, need to understand the object-oriented thinking) is only responsible for a specific task;Singleton class:1. Theconstructor needs to be marked as private(access control: Prevent external code from creating objects using the new operator), the Singleton class cannot be instantiated in other classes, and can only be instantiated

1PHP2 classSingleton {3 /**4 * Description: (1) static variable, save global instance, bind to class, independent of Object5 * (2) Private attribute, in order to avoid calling class name directly outside of class:: $instance, prevent null6 */7 Private Static $instance;8 9 /**Ten * Description: Privatization of constructors to prevent external instantiation of objects One */ A Private function__construct () { - } - the /** - * Description: Privatization of cloni