iOS中提供了2種推送通知

• 本地推送通知（Local Notification）
• 遠(yuǎn)程推送通知（Remote Notification）

推送通知的作用

• 可以讓不在前臺(tái)運(yùn)行的app，告知用戶app內(nèi)部發(fā)生了什么事情
• 推送通知的呈現(xiàn)效果總結(jié)
• 用戶接收的推送通知，都會(huì)展示在“通知中心”
• 從屏幕頂部往下滑，就能調(diào)出“通知中心”
• 顯示橫幅還是UIAlertView，取決于用戶的設(shè)置

總結(jié)一下，推送通知有5種不同的呈現(xiàn)效果

• 在屏幕頂部顯示一塊橫幅（顯示具體內(nèi)容）
• 在屏幕中間彈出一個(gè)UIAlertView（顯示具體內(nèi)容）
• 在鎖屏界面顯示一塊橫幅（鎖屏狀態(tài)下，顯示具體內(nèi)容）
• 更新app圖標(biāo)的數(shù)字（說明新內(nèi)容的數(shù)量）
• 播放音效（提醒作用）

** 推送通知的使用細(xì)節(jié)**

• 發(fā)出推送通知時(shí)，如果當(dāng)前程序正運(yùn)行在前臺(tái)，那么推送通知就不會(huì)被呈現(xiàn)出來
• 點(diǎn)擊推送通知后，默認(rèn)會(huì)自動(dòng)打開發(fā)出推送通知的app
• 不管app打開還是關(guān)閉，推送通知都能如期發(fā)出

本地推送

AppDelegate.m

#import "AppDelegate.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 /* UIUserNotificationTypeNone = 0, 無類型(不給用戶發(fā)通知) 
    UIUserNotificationTypeBadge = 1 << 0, 是否可以改變應(yīng)用圖標(biāo)右上角的提示數(shù)字
    UIUserNotificationTypeSound = 1 << 1, 該通知是否會(huì)有聲音 
    UIUserNotificationTypeAlert = 1 << 2, 是否有彈出提示
 */
 if ([UIDevice currentDevice].systemVersion.doubleValue >= 8.0) {
    UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound categories:nil];
    [application registerUserNotificationSettings:settings];
 }
 if (launchOptions[UIApplicationLaunchOptionsLocalNotificationKey]) {
 // 跳轉(zhuǎn) UILabel *label = [[UILabel alloc] init];
    label.frame = CGRectMake(0, 300, 300, 300);
    label.backgroundColor = [UIColor redColor];
    label.text  = [NSString stringWithFormat:@"%@", launchOptions];
    label.font = [UIFont systemFontOfSize:14];
    label.numberOfLines = 0;
    [self.window.rootViewController.view addSubview:label];
 }
    return YES;
}
/** 
* 點(diǎn)擊通知打開應(yīng)用的時(shí)候會(huì)執(zhí)行該方法 
* 應(yīng)用在前臺(tái)的時(shí)候,收到通知也會(huì)執(zhí)行該方法 
* 
* @param notification 通知 
*/
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
    UILabel *label = [[UILabel alloc] init];
    label.frame = CGRectMake(0, 0, 300, 300);
    label.backgroundColor = [UIColor redColor];
    label.text = [NSString stringWithFormat:@"%@", notification]
    label.font = [UIFont systemFontOfSize:14];
    label.numberOfLines = 0;
    [self.window.rootViewController.view addSubview:label];
   // if (application.applicationState == UIApplicationStateBackground) {
// 
// }
}
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation { 
    return YES;
}
@end

推送

#import "ViewController.h"
@interface ViewController ()
/**
 * 點(diǎn)擊按鈕后添加本地通知
 */
- (IBAction)addLocalNote;
/**
 * 移除通知(不常用) 
 */
- (IBAction)removeLocalNote;
@end
@implementation ViewController
- (void)viewDidLoad {
     [super viewDidLoad];
}
/**
 * 點(diǎn)擊按鈕后添加本地通知 
 */
- (IBAction)addLocalNote {
 /* 
 @property(nonatomic,copy) NSDate *fireDate;
 @property(nonatomic,copy) NSTimeZone *timeZone;
 @property(nonatomic) NSCalendarUnit repeatInterval;
 @property(nonatomic,copy) NSCalendar *repeatCalendar;
 @property(nonatomic,copy) CLRegion *region NS_AVAILABLE_IOS(8_0);
 @property(nonatomic,assign) BOOL regionTriggersOnce NS_AVAILABLE_IOS(8_0);
 @property(nonatomic,copy) NSString *alertBody;
 @property(nonatomic) BOOL hasAction;
 @property(nonatomic,copy) NSString *alertAction;
 @property(nonatomic,copy) NSString *alertLaunchImage;
 @property(nonatomic,copy) NSString *soundName;
 UILocalNotificationDefaultSoundName @property(nonatomic) NSInteger applicationIconBadgeNumber;
 @property(nonatomic,copy) NSDictionary *userInfo;
 */
     // 1.創(chuàng)建一個(gè)本地通知
     UILocalNotification *localNote = [[UILocalNotification alloc] init];
     // 1.1.設(shè)置通知發(fā)出的時(shí)間
     localNote.fireDate = [NSDate dateWithTimeIntervalSinceNow:5];
     // 1.2.設(shè)置通知發(fā)出的內(nèi)容
     localNote.alertBody = @"吃飯了嗎?";
     // 1.3.是否彈出提示框
     localNote.hasAction = YES;
     // 1.4.設(shè)置提示框
     localNote.alertAction = @"趕緊查看";
     // 1.5.設(shè)置啟動(dòng)的圖片
     localNote.alertLaunchImage = @"1111";
     // 1.6.設(shè)置啟動(dòng)的音效
     localNote.soundName = UILocalNotificationDefaultSoundName;
     // 1.7.設(shè)置應(yīng)用圖標(biāo)提醒的數(shù)字
     localNote.applicationIconBadgeNumber = 999;
     // 1.8.如果想將通知的信息傳遞過去,必須使用userInfo屬性
     localNote.userInfo = @{@"msg" : @"吃飯了嗎", @"date" : localNote.fireDate};
     // 2.調(diào)度通知
     [[UIApplication sharedApplication] scheduleLocalNotification:localNote];
     [[UIApplication sharedApplication] setApplicationIconBadgeNumber:0];
}
- (IBAction)removeLocalNote {
     [[UIApplication sharedApplication] cancelAllLocalNotifications];
// [UIApplication sharedApplication] cancelLocalNotification:(UILocalNotification *)
}
@end

遠(yuǎn)程推送

** AppDelegate.m**

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    
    if ([UIDevice currentDevice].systemVersion.doubleValue >= 8.0) {
        // 1.向用戶請(qǐng)求可以給用戶推送消息
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert categories:nil];
        [application registerUserNotificationSettings:settings];
        
        // 2.注冊(cè)遠(yuǎn)程通知(拿到用戶的DeviceToken)
        [application registerForRemoteNotifications];
    } else {
        [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound];
    }
    
    if (launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey]) {
        // 頁面的跳轉(zhuǎn)
    }
    
    [application setApplicationIconBadgeNumber:0];
    
    return YES;
}

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
    // 將用戶的用戶名和deviceToken發(fā)送給服務(wù)器,讓服務(wù)器進(jìn)行保存?zhèn)浞菁纯?    NSLog(@"%@", deviceToken);
}

/**
 *  當(dāng)接受到遠(yuǎn)程通知的時(shí)候會(huì)調(diào)用該方法
 *
 *  @param userInfo    遠(yuǎn)程通知的信息
 */
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
    // 在這里可以跳轉(zhuǎn)的其他頁面
    NSLog(@"%@", userInfo);
}

/**
 *  如果接受到遠(yuǎn)程通知時(shí),想要后臺(tái)執(zhí)行任務(wù),則實(shí)現(xiàn)調(diào)用該方法
 *
 *  @param userInfo
 *  @param completionHandler 后臺(tái)執(zhí)行完之后要告知系統(tǒng),是否更新成功
 */
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
    NSLog(@"%@", userInfo);
    
    completionHandler(UIBackgroundFetchResultNewData);
}

@end