Appdelegate Life Cycle Detailed

#pragma mark calls after the application has finished loading

-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (nsdictionary *) launchOptions

{

NSLog (@ "didfinishlaunchingwithoptions-loading complete");

Initialize a window

Self.window = [[[UIWindow alloc] initwithframe:[[uiscreen mainscreen] bounds]] autorelease];

Incoming xib file name to initialize a controller

Self.viewcontroller = [[[Mjviewcontroller alloc] initwithnibname:@ "Mjviewcontroller" Bundle:nil] autorelease];

Setting the root controller of a window

Self.window.rootViewController = Self.viewcontroller;

The following code is executed inside the code above:

[Self.window AddSubview:self.viewController.view];

The window does not appear by default and requires a method to be called to display

Keywindow is the main window, only the main window can interact with the user normally

[Self.window makekeyandvisible];

Self.window.hidden = NO;

return YES;

}

Called when the mark program loses focus #pragma (cannot interact with the user)

-(void) Applicationwillresignactive: (uiapplication *) application

{

NSLog (@ "applicationwillresignactive-loses focus");

}

#pragma mark is called when the application enters the background (click the Home button)

-(void) Applicationdidenterbackground: (uiapplication *) application

{

NSLog (@ "applicationdidenterbackground-into the background");

}

#pragma mark calls when the application enters the foreground

-(void) Applicationwillenterforeground: (uiapplication *) application

{

NSLog (@ "applicationwillenterforeground-Enter the front desk");

}

#pragma mark calls when the application gets focus

Get focus before you can interact with the user

-(void) Applicationdidbecomeactive: (uiapplication *) application

{

NSLog (@ "applicationdidbecomeactive-get Focus");

}

This method is called when the #pragma mark program is terminated in some cases

-(void) Applicationwillterminate: (uiapplication *) application

{

NSLog (@ "applicationwillterminate-is closed");

}

After the project starts:

first one IOS program [517:c07] didfinishlaunchingwithoptions- Load Complete

first one IOS program [517:c07] applicationdidbecomeactive- Get Focus

Press the home button:   first one IOS program [517:c07] applicationwillresignactive- Lose Focus

first one IOS program [517:c07] applicationdidenterbackground- Go Backstage

Then press the program:

first one IOS program [517:c07] applicationwillenterforeground- Access to reception

first one IOS program [517:c07] applicationdidbecomeactive- Get Focus

Appdelegate Life Cycle Detailed