UI 中程序的生命周期事件（AppDelegate）

#import "AppDelegate.h"

 

@interface AppDelegate ()

 

@end

 

@implementation AppDelegate

 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    NSLog(@"程序加载完成。");

    return YES;

}

 

- (void)applicationWillResignActive:(UIApplication *)application {

    NSLog(@"程序即将转为后台状态。");

}

 

- (void)applicationDidEnterBackground:(UIApplication *)application {

    NSLog(@"程序已经进入了后台状态。");

}

 

- (void)applicationWillEnterForeground:(UIApplication *)application {

    NSLog(@"程序即将转为前台状态。");

}

 

- (void)applicationDidBecomeActive:(UIApplication *)application {

    NSLog(@"程序已经是活动状态。");

}

 

- (void)applicationWillTerminate:(UIApplication *)application {

    NSLog(@"程序终止。");

}

 

@end