推播服務的介紹及運作方式可以參考:
簡單來說就是每個iOS的app第一次開啓時會向apple註冊推播服務,然後得到專屬的device token,可以想像成擁有專屬的tunnel,再來只要向apple的server傳送message(JSON格式),並帶上target device token,server就會自動幫你轉傳給對方。
寫一個小小的測試程式
網站說明非常清楚,大致上的流程如下:
- 登入 iOS dev center 然後創建一個新的 App ID
- 開啓 push notification service
- 下載 "Development Push SSL Certificate" 及 "Provisioning Profile"
- 安裝 provisioning profile
- 設定 identifier
- Write the code to register from remote notification server and get "device token"
要求使用者開啓 Push notification 服務
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [[UIApplication sharedApplication]registerForRemoteNotificationTypes: (UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound)]; }
Implement 3個 delegate
- (void)application:(UIApplication *)app didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken { /* Get device token */ NSString *strDevToken = [NSString stringWithFormat:@"%@", deviceToken]; /* Replace '<', '>' and ' ' */ NSCharacterSet *charDummy = [NSCharacterSet characterSetWithCharactersInString:@"<> "]; strDevToken = [[strDevToken componentsSeparatedByCharactersInSet: charDummy] componentsJoinedByString: @""]; NSLog(@"Device token=[%@]", strDevToken); /* 可以把token傳到server,之後server就可以靠它送推播給使用者了 */ } - (void)application:(UIApplication *)app didFailToRegisterForRemoteNotificationsWithError:(NSError *)err { NSLog(@"Error=[%@]", err); // TODO: when user do not allow push notification service, pop the warning message. } // This function called when receive notification and app is in the foreground. - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo { /* 把收到的推播列舉出來 */ for (id key in userInfo) { NSLog(@"Key=[%@], Value=[%@]", key, [userInfo objectForKey:key]); } /* 印出 Badge number */ NSLog(@"Badge: %@", [[userInfo objectForKey:@"aps"] objectForKey:@"badge"]; }
Sender (MacOS app):
- Base on sample code "PushMeBaby"
- Install "Development Push SSL Certificate"
- Set target device token then send
參考資料
- iPhone Software Development: APNS Client Development Certificate Available Now
- 怎样编写Apple Push Notification服务器
至於要如何架設APNS,可以參考下一篇:架設 Apple Push Notification Provider Server
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