iOS 10 添加本地推送（Local Notification）

前言

iOS 10 中废弃了 UILocalNotification （ UIKit Framework ） 这个类，采用了全新的 UserNotifications Framework 来推送通知，从此推送通知也有了自己的标签 UN （这待遇真是没别人了），以及对推送功能的一系列增强改进（两个 extension 和 界面的体验优化），简直是苹果的亲儿子，因此推送这部分功能也成为开发中的重点。

本文主要查看了 iOS 10 的相关文档，整理出了在 iOS 10 下的本地推送通知，由于都是代码，就不多做讲解，直接看代码及注释，有问题留言讨论哦。

新的推送注册机制

注册通知（ Appdelegate.m ）：

#import <UserNotifications/UserNotifications.h>
#import "AppDelegate.h"
@interface AppDelegate ()<UNUserNotificationCenterDelegate>

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// 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)
completionHandler:^(BOOL granted, NSError * _Nullable error) {
// Enable or disable features based on authorization.
}];

//获取当前的通知设置，UNNotificationSettings 是只读对象，不能直接修改，只能通过以下方法获取
[center getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {

}];
return YES;
}

#pragma mark - UNUserNotificationCenterDelegate
//在展示通知前进行处理，即有机会在展示通知前再修改通知内容。
-(void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler{
//1. 处理通知

//2. 处理完成后条用 completionHandler ，用于指示在前台显示通知的形式
completionHandler(UNNotificationPresentationOptionAlert);
}
@end

推送本地通知

//使用 UNNotification 本地通知
+(void)registerNotification:(NSInteger )alerTime{

// 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:@"Hello!" arguments:nil];
content.body = [NSString localizedUserNotificationStringForKey:@"Hello_message_body"
arguments:nil];
content.sound = [UNNotificationSound defaultSound];

// 在 alertTime 后推送本地推送
UNTimeIntervalNotificationTrigger* trigger = [UNTimeIntervalNotificationTrigger
triggerWithTimeInterval:alerTime 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) {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"本地通知" message:@"成功添加推送" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
[alert addAction:cancelAction];
[[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alert animated:YES completion:nil];
}];
}

iOS 10 以前本地推送通知：

+ (void)registerLocalNotificationInOldWay:(NSInteger)alertTime {
// ios8后，需要添加这个注册，才能得到授权
// if ([[UIApplication sharedApplication] respondsToSelector:@selector(registerUserNotificationSettings:)]) {
// UIUserNotificationType type = UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound;
// UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:type
// categories:nil];
// [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
// // 通知重复提示的单位，可以是天、周、月
// }

UILocalNotification *notification = [[UILocalNotification alloc] init];
// 设置触发通知的时间
NSDate *fireDate = [NSDate dateWithTimeIntervalSinceNow:alertTime];
NSLog(@"fireDate=%@",fireDate);

notification.fireDate = fireDate;
// 时区
notification.timeZone = [NSTimeZone defaultTimeZone];
// 设置重复的间隔
notification.repeatInterval = kCFCalendarUnitSecond;

// 通知内容
notification.alertBody =  @"该起床了...";
notification.applicationIconBadgeNumber = 1;
// 通知被触发时播放的声音
notification.soundName = UILocalNotificationDefaultSoundName;
// 通知参数
NSDictionary *userDict = [NSDictionary dictionaryWithObject:@"开始学习iOS开发了" forKey:@"key"];
notification.userInfo = userDict;

// ios8后，需要添加这个注册，才能得到授权
if ([[UIApplication sharedApplication] respondsToSelector:@selector(registerUserNotificationSettings:)]) {
UIUserNotificationType type =  UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound;
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:type
categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
// 通知重复提示的单位，可以是天、周、月
notification.repeatInterval = NSCalendarUnitDay;
} else {
// 通知重复提示的单位，可以是天、周、月
notification.repeatInterval = NSDayCalendarUnit;
}

// 执行通知注册
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
}