iOS 推送手机消息背后的技术

#import <UserNotifications/UserNotifications.h>
……
[[UNUserNotificationCenter currentNotificationCenter]
requestAuthorizationWithOptions:UNAuthorizationOptionSound|UNAuthorizationOptionAlert|UNAuthorizationOptionBadge
completionHandler:^(BOOL granted, NSError * _Nullable error) {
    if(granted){
        //用户允许了推送权限申请
    }else{
        //用户拒绝了推送权限申请
    }
}];

[[UIApplication sharedApplication] registerUserNotificationSettings:
 [UIUserNotificationSettings settingsForTypes:
  (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge)
                                   categories:nil]];

if(@available(iOS 10.0,*)){
    [[UNUserNotificationCenter currentNotificationCenter] getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
        if (UNAuthorizationStatusDenied == settings.authorizationStatus) {
            //用户拒绝消息推送，弹窗提示引导用户去系统设置中进行授权
            UIAlertController* alert = [UIAlertController alertControllerWithTitle:@"未打开推送功能" message:@"请在设备的\"设置-App-通知\"选项中，允许通知" preferredStyle:UIAlertControllerStyleAlert];
            UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction* action){
                [alert dismissViewControllerAnimated: YES completion: nil];
            }];
            UIAlertAction* ok = [UIAlertAction actionWithTitle:@"去设置" style:UIAlertActionStyleDefault handler:^(UIAlertAction* action){
                [alert dismissViewControllerAnimated: YES completion: nil];
                NSURL * url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
                if([[UIApplication sharedApplication] canOpenURL:url])
                {
                    NSURL*url =[NSURL URLWithString:UIApplicationOpenSettingsURLString];
                    [[UIApplication sharedApplication] openURL:url];
                }
            }];
            [alert addAction: cancel];
            [alert addAction: ok];
            [[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alert animated: YES completion: nil];
        }
    }];
}else{
    UIUserNotificationSettings *setting = [[UIApplication sharedApplication] currentUserNotificationSettings];
    if (UIUserNotificationTypeNone == setting.types) {
        //用户拒绝消息推送，处理方式同上
    }
}

//推送内容
UNMutableNotificationContent* content = [[UNMutableNotificationContent alloc] init];
content.title = @"推送标题";
content.body = @"推送内容";
content.sound = [UNNotificationSound defaultSound];//默认提示音
//日期推送，今日15:53:00推送本地消息
NSDateComponents* date = [[NSDateComponents alloc] init];
date.hour = 15;
date.minute = 53;
UNCalendarNotificationTrigger* calendarTrigger = [UNCalendarNotificationTrigger
       triggerWithDateMatchingComponents:date repeats:NO];
//倒计时推送，2s后推送本地消息
UNTimeIntervalNotificationTrigger *intervalTrigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:2 repeats:NO];
UNNotificationRequest* request = [UNNotificationRequest
       requestWithIdentifier:@"testId" content:content trigger:calendarTrigger];
//将推送请求添加到管理中心才会生效
UNUserNotificationCenter* center = [UNUserNotificationCenter currentNotificationCenter];
[center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
   if (error != nil) {
       NSLog(@"%@", error.localizedDescription);
   }
}];

UILocalNotification *notification = [[UILocalNotification alloc] init];
notification.fireDate = [NSDate dateWithTimeIntervalSinceNow:2];
notification.alertTitle = @"推送标题";
notification.alertBody = @"推送内容";
//notification.soundName = UILocalNotificationDefaultSoundName;
notification.soundName = @"mysound.wav";
[[UIApplication sharedApplication] scheduleLocalNotification:notification];

//调用系统方法请求deviceToken
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [[UIApplication sharedApplication] registerForRemoteNotifications];
}
//deviceToken获取成功的回调
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken{
    NSString *deviceTokenStr;
    NSUInteger length = deviceToken.length;
    if (![deviceToken isKindOfClass:[NSData class]] || length == 0) {
        return;
    }
    const unsigned char *bytes = (const unsigned char *)deviceToken.bytes;
    NSMutableString *hex = [NSMutableString new];
    for (NSInteger i = 0; i < deviceToken.length; i++) {
        [hex appendFormat:@"%02x", bytes[i]];
    }
    deviceTokenStr = [hex copy];
    NSLog(@"%@", deviceTokenStr);
}
//deviceToken获取失败的回调
- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error{
    NSLog(@"error,%@",error);
}

openssl pkcs12 -in push_dev.p12 -out push_dev.pem -nodes

$deviceToken= '22124c450762170ca2ddb32a50381dd2c3026dbdb020f6dddcabefdca724fdd6';
//dev params
$devUrl = 'ssl://gateway.sandbox.push.apple.com:2195';
$devCertificate = 'push_dev.pem';
//product params
$proUrl = 'ssl://gateway.push.apple.com:2195';
$proCertificate = 'push_pro.pem';
// Change 2 : If any
$title = '标题';//消息标题
$content = '消息内容';//内容
$ctx = stream_context_create();
// Change 3 : APNS Cert File name and location.
stream_context_set_option($ctx, 'ssl', 'local_cert', $devCertificate);
// Open a connection to the APNS server
$fp = stream_socket_client($devUrl, $err, $errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);
if (!$fp)
    exit("Failed to connect: $err $errstr" . PHP_EOL);
echo 'Connected to APNS' . PHP_EOL;
// Create the payload body
$body['aps'] = array(
    'alert' =>array(
        'title'=>$title,
        'body'=>$content
    ),
    'sound' => 'default'
    );
//自定义内容
$body['userInfo'] = array(
    'url' => 'https://www.qq.com',
);
// Encode the payload as JSON
$payload = json_encode($body);
// Build the binary notification
$msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken) . pack('n', strlen($payload)) . $payload;
// Send it to the server
$result = fwrite($fp, $msg, strlen($msg));
//发送多个就调用多次fwrite
//$result = fwrite($fp, $msg, strlen($msg));
echo $msg;
if (!$result)
    echo 'Message not delivered' . PHP_EOL;
else
    echo 'Message successfully delivered' . PHP_EOL;
// Close the connection to the server
fclose($fp);

{
    "aps" : {
        "alert" : {
            "title" : "Game Request",
            "subtitle" : "Five Card Draw",
            "body" : "Bob wants to play poker",
        },
        "badge" : 9,
        "sound" : "gameMusic.wav",
    },
    "gameID" : "12345678"
}

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

@implementation AppDelegate
//在App启动后就将AppDelegate对象配置为NotificationCenter的delegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [UNUserNotificationCenter currentNotificationCenter].delegate = self;
    // NSDictionary *localNotification = [launchOptions valueForKey:UIApplicationLaunchOptionsLocalNotificationKey];
    NSDictionary *remoteNotification = [launchOptions valueForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
    if(remoteNotification){
        //app已退出，点击拉起了app
        NSDictionary *params = userInfo[@"userInfo"];
        //此时NavigationController还未初始化，可以先暂存参数，稍后跳转
        [PageSwitch handlePushSwitch:params];
    }
}
//用户点击推送消息的回调
- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler API_AVAILABLE(ios(10.0)){
    UNNotification *noti = ((UNNotificationResponse *)response).notification;
    NSDictionary *userInfo = noti.request.content.userInfo;
    NSDictionary *params = userInfo[@"userInfo"];
    //根据消息推送中的参数，在用户点击推送时自动进行跳转
    [PageSwitch handlePushSwitch:params];
}
//App在前台运行时收到推送消息的回调
- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(nonnull UNNotification *)notification withCompletionHandler:(nonnull void (^)(UNNotificationPresentationOptions))completionHandler API_AVAILABLE(ios(10.0)){
    //可以让App在前台运行时也能收到推送消息
    completionHandler(UNNotificationPresentationOptionBadge|UNNotificationPresentationOptionAlert);
}

//远程消息推送回调方法，ios(3.0, 10.0)
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo;
//远程静默推送回调方法，ios(7.0, *)
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo 
    fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler API_AVAILABLE(ios(7.0));
//本地消息推送回调方法，ios(4.0, 10.0)
-(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification;

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo{
    if([UIApplication sharedApplication].applicationState == UIApplicationStateActive){
        NSLog(@"在前台,%@",userInfo);
    }else{
        NSLog(@"从后台进入前台，%@",userInfo);
        NSDictionary *params = userInfo[@"userInfo"];
        if([Tools isValidString:params[@"url"]]){
            NSString *routeUrl = params[@"url"];
            [PageSwitch handlePushSwitch:params];
        }
    }
}