iOS AppDelegate的.m文件解析

//
//  AppDelegate.m

#import "AppDelegate.h"

@implementation AppDelegate

/**
*  app加载完毕的时候调用(一般只调用一次)
*
*/
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSLog(@"didFinishLaunchingWithOptions");
return YES;
}

/**
*  app失去焦点的时候调用(UI控件不能正常使用)
*/
- (void)applicationWillResignActive:(UIApplication *)application
{
NSLog(@"applicationWillResignActive");
}

/**
*  app进入后台的时候调用(app消失不见)
*/
- (void)applicationDidEnterBackground:(UIApplication *)application
{
NSLog(@"applicationDidEnterBackground");
}

/**
*  app进入前台的时候调用(app显示出来)
*/
- (void)applicationWillEnterForeground:(UIApplication *)application
{
NSLog(@"applicationWillEnterForeground");
}

/**
*  当app获得焦点的时候调用(这时候整个app的UI控件都能正常使用)
*/
- (void)applicationDidBecomeActive:(UIApplication *)application
{
NSLog(@"applicationDidBecomeActive");
}

//app进入后台:休眠,  不能接受事情(比如关闭)
/**
*  app关闭的时候调用(一般情况下不会调用)
*/
- (void)applicationWillTerminate:(UIApplication *)application
{
NSLog(@"applicationWillTerminate");
}

@end