uiapplication

uiapplication Object Description:1>a uiapplication representative is an application, and it is a singleton. **an object used to encapsulate an entire application, such as what to do when the application executes to a certain period, the life cycle, and so on. 2>get UIApplication object: [UIApplication sharedapplication

IOS development UI Article 16 program startup principle and UIApplication IOSDevelopmentUIArticle-Program startup principles andUIApplication I,UIApplication 1. Brief Introduction (1) A UIApplication object represents an application. A UIApplication object represents an application. (2) Each application has its own

iOS Development UI Chapter-Program Startup principle and UIApplicationFirst,uiapplication 1. Brief introduction(1) The UIApplication object is a symbol of the application, and a UIApplication object represents an application.(2) Each application has its own UIApplication object, and is a singleton, if you try to create

Transfer from http://blog.csdn.net/xingxing513234072/article/details/16342889UIApplication, Appdelegate, entrustment, etc.?What is a delegate? Why should we have a commission? What is the implementation mechanism of the Commission on the iphone?In general, we created an iphone project, which has the MAIN.M class by default, and we all know that a main () method represents the portal of an application,The following is the method body for the corresponding MAIN.M:[OBJC]View Plaincopy int

[Reprinted from the top of the article] iOS development UI-program startup principle and UIApplication, iosuiapplicationI,UIApplication1. Brief Introduction (1) A UIApplication object represents an application. A UIApplication object represents an application. (2) Each application has its own UIApplication object, whic

First,uiapplication 1. Brief introduction(1) The UIApplication object is a symbol of the application, and a UIApplication object represents an application.(2) Each application has its own UIApplication object, and is a singleton, if you try to create a new UIApplication obje

Each app has and has only one UIApplication object, which is obtained by invoking the Uiapplicationmain method when the program starts. can be obtained by sharedapplication method.The primary task of the UIApplication object is to handle the processing path of the user event, such as distributing a uievent to another object to handle. The UIApplication object hol

IPhone applicationsProgramIs started by the main function, which is responsible for calling the uiapplicationmain functionFunctionThe format is as follows:Int uiapplicationmain (Int argc,Char * argv [],Nsstring * principalclassname,Nsstring * delegateclassname);So what did the uiapplicationmain function do? This function is mainly responsible for three things: 1) initialize from the given class nameApplicationThe program object, that is, an instance that initializes the

1.UIApplication is the symbol of the application, a UIApplication object represents an application2. Each application has its own UIApplication object, and it is a singleton3. This singleton object can be obtained by [UIApplication Sharedapplication]4. An iOS program is created after the first object is the

UIApplication What is UIApplication? The UIApplication object is a symbol of the program.Each application has its own UIApplication object, this object is the system automatically help us create, it is a 单例对象 .The first object created after an iOS program is started is a