iOS之本地推送UILocalNotification

2016-05-25 本文已影响2844人向钱冲啊

前言

随着智能手机设备的普及，好多APP都用到了推送服务，而iOS下应用分为两种不同的Notification种类。本地推送和远程推送。本地推送是由iOS下的NotificationManage进行统一管理的，只需要将封装好的本地Notification对象加入到系统的Notification管理中去即可。而远程推送需要服务器的支持并且处于长连接的状态，通常用来定时提醒用户完成一些任务或参加一些活动。

本地通知的实现

NSObject+NSLocalNotification.h

#import <Foundation/Foundation.h>
@interface NSObject (NSLocalNotification)

/**
 *   注册通知 为NSObject 扩展本地通知的分类
 *
 *   @param   time          距离当前时间为多少秒发送通知
 *   @param   content       推送通知的内容
 *   @param   key           注册通知的key值
 */
+ (void)registerLocalNotification:(NSInteger)time content:(NSString *)content key:(NSString *)key;

/**
 *   取消通知
 *
 *  @param   key   根据key值取消对应通知
 *
 */
+ (void)cancelLocalNotificationWithKey:(NSString *)key;

@end ```





###1. 注册通知，配置相应的参数
NSObject+NSLocalNotification.m

```ruby
#define DEVICE_iOS_8    [UIDevice currentDevice].systemVersion.floatValue >= 8.0
#define DEVICE_iOS_9    [UIDevice currentDevice].systemVersion.floatValue >= 9.0

#import "NSObject+NSLocalNotification.h"
#import "AppDelegate.h"

@implementation NSObject (NSLocalNotification)

+ (void)registerLocalNotification:(NSInteger)time content:(NSString *)content key:(NSString *)key;
{
        //创建一个本地通知
    UILocalNotification *notification = [[UILocalNotification alloc] init];

    // 设置触发通知的时间
    NSDate *fireDate = [NSDate dateWithTimeIntervalSinceNow:time];
  
    notification.fireDate = fireDate;
    // 时区
    notification.timeZone = [NSTimeZone defaultTimeZone];
    // 设置重复的间隔
    notification.repeatInterval = 0;
 
    notification.alertBody =  content;   

    notification.applicationIconBadgeNumber = 1;  

    notification.soundName = UILocalNotificationDefaultSoundName;

    NSDictionary *userDict = [NSDictionary dictionaryWithObject:content forKey:key];
    
    notification.userInfo = userDict;
    
     //请求本地通知 授权
    [self getRequestWithLocalNotificationSleep:notification]; 


    //选择使用 哪个操作组（这个操作组可以自定义 比如QQ消息从顶部弹出消息后可以自定义设置Action 例如 ：快捷回复  关闭等）
//    notification.category = @"select";
    
     
} ```
 

 ###2.请求授权
``` ruby
- (void)getRequestWithLocalNotificationSleep:(UILocalNotification *)notification
{
    // 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];
    }
    
#warning 注册完之后如果不删除，下次会继续存在，即使从模拟器卸载掉也会保留
    
 
    [[UIApplication sharedApplication]cancelAllLocalNotifications];
    
    [[UIApplication sharedApplication] scheduleLocalNotification:notification];

}

#pragma mark - 取消通知
+ (void)cancelLocalNotificationWithKey:(NSString *)key
{
    // 获取所有本地通知数组
    NSArray *localNotifications = [UIApplication sharedApplication].scheduledLocalNotifications;
    
    if (localNotifications) {
        
        
        for (UILocalNotification *notification in localNotifications) {
            NSDictionary *userInfo = notification.userInfo;
            if (userInfo) {
                // 根据设置通知参数时指定的key来获取通知参数
                NSString *info = userInfo[key];
                
                // 如果找到需要取消的通知，则取消
                if ([info isEqualToString:key]) {
                    if (notification) {
                        [[UIApplication sharedApplication] cancelLocalNotification:notification];
                    }
                    break;
                }
            }
        }
        
    }
}

3.调用通知

Appdelegate.m



#define LOCALNOTIFICATION_KEY             @"localNotificationKey"

#import "AppDelegate.h"
#import "NSObject+NSLocalNotification.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    [AppDelegate registerLocalNotification:10 content:@"本地推送练习" key:LOCALNOTIFICATION_KEY];
    
    NSLog(@"launchOptions: %@", launchOptions);
    
          return YES;
}```

###4.接收到通知后的回调

/**
只有当发送出一个本地通知, 并且满足以下条件时, 才会调用该方法
APP 处于前台情况
当用用户点击了通知, 从后台, 进入到前台时,
当锁屏状态下, 用户点击了通知, 从后台进入前台
注意: 当App彻底退出时, 用户点击通知, 打开APP , 不会调用这个方法
但是会把通知的参数传递给 application(application: UIApplication, didFinishLaunchingWithOptions launchOptions:

(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{

UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"接收到本地通知" message:notification.alertBody delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil];
[alert show];

// 查看当前的状态出于(前台: 0)/(后台: 2)/(从后台进入前台: 1)
NSLog(@"applicationState.rawValue: %zd", application.applicationState);

// 执行响应操作
// 如果当前App在前台,执行操作
if (application.applicationState == UIApplicationStateActive) {
NSLog(@"执行前台对应的操作");
} else if (application.applicationState == UIApplicationStateInactive) {
// 后台进入前台
NSLog(@"执行后台进入前台对应的操作");
NSLog(@"*****%@", notification.userInfo);
} else if (application.applicationState == UIApplicationStateBackground) {
// 当前App在后台
```
  NSLog(@"执行后台对应的操作");
```
}
}```

至此一个本地推送已经完成需要注意的是

app处于前台此时不会弹框通知用户通知的到达，但是还是会调用对应的代理方法

app并没有关闭,一直隐藏在后台时此时用户点击通知信息后,会让app进入前台,并会调用AppDelegate的下面方法application: didReceiveLocalNotification:

app已经被关闭（进程已死)此时用户点击通知信息后,会启动app,启动完毕会调用AppDelegate的下面方法 application:didFinishLaunchingWithOptions:launchOptions参数通过UIApplicationLaunchOptionsLocalNotificationKey取出本地推送通知象

如果本地通知没有移除，就算是卸载了app后，下次重新安装还是会存在

本地通知经过查阅资料有数量限制。貌似是64个以内。超过的将被系统忽略

关于带有Action的本地通知，详情见本文demo地址 https://github.com/JimmyLession/NSLocalNotificationDemo.git

如有任何疑问可以私信，谢谢！

iOS之本地推送UILocalNotification

前言

本地通知的实现

3.调用通知

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