iOS之UIApplication详解(2)

  1 //
  2 
  3 //  AppDelegate.m
  4 
  5 //  AppDelegate
  6 
  7 //
  8 
  9 //  Created by apple on 13-7-10.
 10 
 11 //  Copyright (c) 2013年 itcast. All rights reserved.
 12 
 13 //
 14 
 15  
 16 
 17 #import "AppDelegate.h"
 18 
 19  
 20 
 21 #import "ViewController.h"
 22 
 23  
 24 
 25 @implementation AppDelegate
 26 
 27  
 28 
 29 - (void)dealloc
 30 
 31 {
 32 
 33     [_window release];
 34 
 35     [_viewController release];
 36 
 37     [super dealloc];
 38 
 39 }
 40 
 41  
 42 
 43 #pragma mark app加载完毕(默认情况下,只会打印1次)
 44 
 45 // launchOptions : 包含应用启动的一些信息(比如通过点击通知打开应用)
 46 
 47 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 48 
 49 {
 50 
 51     self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
 52 
 53     // Override point for customization after application launch.
 54 
 55     self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
 56 
 57     self.window.rootViewController = self.viewController;
 58 
 59     [self.window makeKeyAndVisible];
 60 
 61     
 62 
 63     NSLog(@"didFinishLaunchingWithOptions--app加载完毕");
 64 
 65     return YES;
 66 
 67 }
 68 
 69  
 70 
 71 #pragma mark 失去焦点
 72 
 73 // 程序进入Inactive状态
 74 
 75 - (void)applicationWillResignActive:(UIApplication *)application
 76 
 77 {
 78 
 79     NSLog(@"applicationWillResignActive-未激活");
 80 
 81 }
 82 
 83  
 84 
 85 #pragma mark 进入后台
 86 
 87 // 一般在这个方法中保存数据
 88 
 89 - (void)applicationDidEnterBackground:(UIApplication *)application
 90 
 91 {
 92 
 93     NSLog(@"applicationDidEnterBackground-进入后台");
 94 
 95     
 96 
 97     // 让程序保持后台运行状态
 98 
 99     [application beginBackgroundTaskWithExpirationHandler:^{
100 
101         NSLog(@"后台运行时间到期了");
102 
103     }];
104 
105     
106 
107     // 取消所有的通知
108 
109     [application cancelAllLocalNotifications];
110 
111     
112 
113     UILocalNotification *note = [[[UILocalNotification alloc] init] autorelease];
114 
115     // 设置通知的文字
116 
117     note.alertBody = @"赶紧回来吧,哥!";
118 
119     // 设置通知出现的时间间隔
120 
121     note.repeatInterval = NSMinuteCalendarUnit;
122 
123     // 设置通知出现的声音
124 
125     // note.soundName = @"xxx.wav";
126 
127     // 设置通知第一次出现的时间
128 
129     note.fireDate = [NSDate dateWithTimeIntervalSinceNow:4];
130 
131     
132 
133     // 发布通知
134 
135     // [application presentLocalNotificationNow:<#(UILocalNotification *)#>];
136 
137     [application scheduleLocalNotification:note];
138 
139 }
140 
141  
142 
143 #pragma mark 进入前台
144 
145 - (void)applicationWillEnterForeground:(UIApplication *)application
146 
147 {
148 
149     NSLog(@"applicationWillEnterForeground-进入前台");
150 
151 }
152 
153  
154 
155 #pragma mark 当app被激活(获得了焦点,可以跟用户进行交互)
156 
157 // 这时候程序处于:Running状态
158 
159 - (void)applicationDidBecomeActive:(UIApplication *)application
160 
161 {
162 
163     NSLog(@"applicationDidBecomeActive-正在运行");
164 
165 }
166 
167  
168 
169 #pragma mark 当app接收到内存警告
170 
171 // 一般在这里回收不必要内存
172 
173 // 1.很容易就创建回来的对象
174 
175 // 2.占用内存很大的对象
176 
177 - (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
178 
179     NSLog(@"applicationDidReceiveMemoryWarning-内存警告");
180 
181 }
182 
183  
184 
185  
186 
187 #pragma mark 当程序处于后天运行状态,并且程序被关闭了就会调用
188 
189 - (void)applicationWillTerminate:(UIApplication *)application
190 
191 {
192 
193     NSLog(@"applicationWillTerminate--程序被关闭");
194 
195 }
196 
197 @end
198 
199  

 

posted on 2014-10-23 15:23  林源  阅读(163)  评论(0编辑  收藏  举报

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