iOS Program # startup process

[App app]

Chinese name: default

Foreign Name: Default

Pinyin: Quēshěng

Explanation: System default State

Full Name: Default state

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1. Program Start sequence

1> MAIN.M procedure Entrance;

2>main function in Uiapplicationmain (), create an App object, and specify this app agent, detect the execution of the program, turn on the "event loop??" ; The event received by the handler;

3>uiapplicationdelegate method execution;

4> loading window;

5> specifying the root view Controller

(Root Viewcontroller)

2, UIApplication

In the iphone app, use an example of uiapplication (singleton, easy to use).

Main: Handling User events, window display, to the app application "designated agent"-to monitor the operation of the program.

3. main.m Main function

int main (int argc, char *argv[]) {

@autoreleasepool {

　　　　Return Uiapplicationmain (argc, argv, Nil, Nsstringfromclass ([Appdelegate class]));

}

}

Main does only three things:

1. Create Autoreleasepool auto-free pool

2. Call the Uiapplicationmain function

3. Using the auto-release pool

4, automatic release of the pool Autoreleasepool

A mechanism for "managing memory" that delays the release of objects created in a code block with certain functionality.

5, Uiapplicationmain

6, Uiapplicationdelegate

7, UIWindow

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Ps:

[one sentence per day]

"The whole world will make way for him if he knows where he's going,"--north face

[An English song every day]

"Nothing ' s Gonna change my love for You"--Westlife

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iOS Program # startup process