iOS 本地通知

以前一直迷惑，本地推送到底有什么用，后来仔细想了想，确实有用（废话，不然苹果爸爸干嘛开发这个？手动鄙视自己！）

本地通知服务 主要处理基于时间行为的通知。比如定时通知用户该起床撒尿了。

就是这么个用处！嗯，是这样吧？是的！

在iOS10苹果废弃了之前的UILocalNotification，而采用了新的UserNotifications Framework来推送通知。现在先说一下iOS10之前的本地推送流程！

iOS 10之前

注册通知

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. if ([[UIDevice currentDevice].systemVersion floatValue] > 8.0) { UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil]; [application registerUserNotificationSettings:settings]; } return YES; }

发送通知

// 1.创建一个本地通知 UILocalNotification *localNote = [[UILocalNotification alloc] init]; // 1.1.设置通知发出的时间 localNote.fireDate = [NSDate dateWithTimeIntervalSinceNow:5]; // 1.2.设置通知内容 localNote.alertBody = @"这是一个本地推送"; // 1.3.设置锁屏时,字体下方显示的一个文字 localNote.alertAction = @"看我"; localNote.hasAction = YES; // 1.4.设置启动图片(通过通知打开的) localNote.alertLaunchImage = @"../Documents/1.jpg"; // 1.5.设置通过到来的声音 localNote.soundName = UILocalNotificationDefaultSoundName; // 1.6.设置应用图标左上角显示的数字 localNote.applicationIconBadgeNumber = 1; // 1.7.设置一些额外的信息 localNote.userInfo = @{@"hello" : @"how are you", @"msg" : @"success"}; // 2.执行通知 [[UIApplication sharedApplication] scheduleLocalNotification:localNote];

这里要说一点，就是iOS系统限制了注册本地推送的数量，最大的注册量为64条。

接收推送

应用在前台或后台，未被杀死时。 //程序处于前台或后台时调用 - (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{ NSLog(@"333这里被调用"); UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Title" message:@"程序在前台或后台，未被杀死，点击通知栏调用" delegate:self cancelButtonTitle:@"cancel" otherButtonTitles:@"ok", nil]; [alert show]; } 程序已被杀死时 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. if (launchOptions[UIApplicationLaunchOptionsLocalNotificationKey]) { //添加处理代码 NSLog(@"666这里被调用"); UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Title" message:@"程序已被杀死，点击通知栏调用" delegate:self cancelButtonTitle:@"cancel" otherButtonTitles:@"ok", nil]; [alert show]; } return YES; }

iOS 10之后

先导入这个东西#import <UserNotifications/UserNotifications.h>

注册通知

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. // 使用 UNUserNotificationCenter 来管理通知 UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter]; //监听回调事件 center.delegate = self; //iOS 10 使用以下方法注册，才能得到授权 [center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert + UNAuthorizationOptionSound + UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) { // Enable or disable features based on authorization. }]; return YES; }

发送通知

// 使用 UNUserNotificationCenter 来管理通知 UNUserNotificationCenter* center = [UNUserNotificationCenter currentNotificationCenter]; //需创建一个包含待通知内容的 UNMutableNotificationContent 对象，注意不是 UNNotificationContent ,此对象为不可变对象。 UNMutableNotificationContent* content = [[UNMutableNotificationContent alloc] init]; content.title = [NSString localizedUserNotificationStringForKey:@"本地推送Title" arguments:nil]; content.body = [NSString localizedUserNotificationStringForKey:@"本地推送Body" arguments:nil]; content.sound = [UNNotificationSound defaultSound]; // 在 设定时间 后推送本地推送 UNTimeIntervalNotificationTrigger* trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:5 repeats:NO]; UNNotificationRequest* request = [UNNotificationRequest requestWithIdentifier:@"FiveSecond" content:content trigger:trigger]; //添加推送成功后的处理！ [center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) { }];

通知处理

实现UNUserNotificationCenterDelegate代理方法:

第一个方法： -(void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler{ // 处理完成后条用 completionHandler ，用于指示在前台显示通知的形式 completionHandler(UNNotificationPresentationOptionSound); }

这个方法中的那句话就是，当应用在前台的时候，收到本地通知，是用什么方式来展现。系统给了三种形式：

typedef NS_OPTIONS(NSUInteger, UNNotificationPresentationOptions) { UNNotificationPresentationOptionBadge = (1 << 0), UNNotificationPresentationOptionSound = (1 << 1), UNNotificationPresentationOptionAlert = (1 << 2), } 第二个代理方法：

这个方法是在后台或者程序被杀死的时候，点击通知栏调用的，在前台的时候不会被调用

- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void(^)())completionHandler{ UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Title" message:@"message" delegate:self cancelButtonTitle:@"cancel" otherButtonTitles:@"ok", nil]; [alert show]; completionHandler(); }