推播音效任我訂，尖叫尖笑都可行 ( 彼得潘App程式設計第101式)

UILocalNotification物件有個NSString型別的soundName property，正是讓我們設定音效的。UILocalNotificationDefaultSoundName將播放內建的提醒音效，也就是我們收到簡訊時聽到的聲音。


    UILocalNotification *localNotification = [[UILocalNotification alloc] init];

   localNotification.soundName = UILocalNotificationDefaultSoundName;

除了內建的音效，我們也可以自訂音效，不管是嚇死人的驚聲尖叫還是笑死人的驚聲尖笑都可以，只要將soundName指定為音效檔的檔名(記得要事先將音效檔加到專案裡)，例如以下程式碼:

       localNotification.soundName = @"test.wav";



不過對於推播的音效檔，Apple倒是有以下2點限制:
a. 檔案必須是caf, wav或是aiff格式。
b. 聲音長度必須少於30秒，否則將播放內建的提醒音效。

若是指定的soundName檔案不存在，也會播放內建的提醒音效。

一般我們經由iTunes將CD存入Mac的音樂都是m4a的格式，若是想轉為推播格式，可於Terminal輸入以下指令輸出caf檔。

    afconvert  你就是我要的.m4a  你就是我要的.caf -d ima4 -f caff –v

NSNotificationCenter

- (void)addObserver:(id)observer selector:(SEL)aSelector :(NSString *)aName object:(id)anObject;

register to receive notification

parameter:

1. observer: the object to receive notification

2. aName: name of notification, if it is nil, we receive all notifications sent out by anObject

3. anObject: specify object we want to observe. If it is nil, we receive all notification with aName

we can register many objects to receive same notification.

- (void)postNotificationName:(NSString *)aName object:(id)anObject;

send notfication

parameter:

anObject: sender

sandbox & production environment for iOS push

sandbox environment:
1. provisioning profile
    development provisioning profile
    provisioning profile以iPhone Developer開頭
2. Apple server:
    gateway.push.apple.com
3. certificate
    Development Push SSL Certificate


production environment
1. provisioning profile
    distribution provision profile (ad-hoc or App store)
    provisioning profile以iPhone Distribution開頭
2. Apple server:

   gateway.sandbox.push.apple.com
3. certificate
   Production Push SSL Certificate

provisioning profile for push notification

can not use wildcard App ID
( However, in app purchase's provisioning profile can use wildcard App ID)

當provisioning profile對到的App ID有enable push時，
provisioning profile裡將包含aps-environment這組key。
(使用text editor打開provisioning profile即可檢查。)

notification on iOS and Cocoa

注冊接收notification

ex:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(test:) name:@"TEST_NOTIFICATION" object:nil];

addObserver: 接收notification的物件

object: 有興趣的對象，也就是發出notification的對象。nil表示不限對象。

push by Urban Airship

API reference:
http://urbanairship.com/docs/push.html

利用curl發送broadcast
curl -X POST -u "abcd:defg" -H "Content-Type: application/json" --data '{"aps":{"alert":"hello"}}' https://go.urbanairship.com/api/push/broadcast/
說明:
abcd是app key, defg是app master secret

利用curl發送push:
curl -X POST -u "abcd:defg" -H "Content-Type: application/json" --data '{"device_tokens":["BDD076692A89126ED3C5EA057F7C253534807D6F30C04FB67F01FCDD5BDDCB7B"] , "aps":{"alert":"hello"}}' https://go.urbanairship.com/api/push/
說明:
BDD076692A89126ED3C5EA057F7C253534807D6F30C04FB67F01FCDD5BDDCB7B is device token

在iOS device上使用urban airship提供的library
reference:
http://urbanairship.com/docs/apns_test_client.html

Local Notification

從local端，也就是iPhone, iPad或iPad自己本身所觸發的notification。