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();
}
