CTTelephonyCenterAddObserver doesn't notify receiving SMS

Question

I have an app where I want to react when a SMS is received; up until iOS 7 this worked by registering to CTTelephonyCenter like this:

        id center = CTTelephonyCenterGetDefault();
        CTTelephonyCenterAddObserver(center,
                                     NULL,
                                     callback,
                                     NULL,
                                     NULL,
                                     CFNotificationSuspensionBehaviorHold);

and in the callback checking for kCTMessageReceivedNotification. This does not work in iOS 8 anymore, as I receive far less notification types than on iOS 7, and none related to message receiving. I assume this is about a new entitlement, but could not figure yet if so, and what is the entitlement needed. Does anybody know how to solve this?

How to add this observer? Do we need to import any framework? When I add above code, I get error "Implicit declaration of function CTTelephonyCenterGetDefault is invalid in c99, conversion from int to id not allowed in arc, CTTelephonyCenterAddObserver not valid in c99 — Durgaprasad, May 27 '15 at 06:59

creker · Accepted Answer · 2015-06-25T13:24:03.100

6

You need to specify notification name in fourth argument:

id center = CTTelephonyCenterGetDefault();
CTTelephonyCenterAddObserver(center,
                             NULL,
                             callback,
                             CFSTR("kCTMessageReceivedNotification"),
                             NULL,
                             CFNotificationSuspensionBehaviorHold);

As of iOS 8 you can't pass NULL as notification name to recieve all CoreTelephony notifications. Now you must tell it exactly which notifications you want to observe.

8.3 UPDATE

As of iOS 8.3 at least kCTMessageReceivedNotification requires entitlement to be received (probably the case for all notifications but don't know for sure)

<key>com.apple.CommCenter.fine-grained</key>
<array>
    <string>spi</string>
</array>

edited Jun 25 '15 at 13:24

answered Nov 22 '14 at 00:47

creker

9,400
1
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47

Thank you. You saved me from a lot of digging :) – Orph Nov 24 '14 at 07:13
Since iOS 8.3, it seems that it's no more available. I am trying with other notification that are still working on iOS 8.2 and prior. I don't know why, but it looks like Apple change the behavior of CTTelephonyCenterAddObserver. I tried to disassemble 8.2 & 8.3 CoreTelephony.framework, and all signatures seem to be the same. Do you have a workaround? Thank you. – Boobby69 Apr 10 '15 at 15:18
@creker what value should I use to listen to phone calls, and where is this information listed or found? Thanks! – mylord May 08 '15 at 00:29
@creker How do you add the entitlement? – Guntis Treulands May 05 '16 at 16:54

score 1 · Answer 2 · answered Apr 20 '15 at 16:29

1

Since iOS 8.3, the CTTelephonyCenterAddObserver don't work any more.

answered Apr 20 '15 at 16:29

Deiz_84

19
1

@creker are you tested it with kCTMessageReceivedNotification on iOS 8.3? – Deiz_84 Apr 20 '15 at 16:30
@creker what's the value needed to listen for phone calls (to make phone call recording work)? – mylord May 08 '15 at 00:27
@creker, how i can add this entitlement. its' for non jailbreak iPhone? – Deiz_84 Aug 27 '15 at 17:16
Sadly adding entitlements is possible only for jailbroken phones. To add entitlements you can use ldid tool to resign the app – Orph Aug 28 '15 at 15:49

CTTelephonyCenterAddObserver doesn't notify receiving SMS

2 Answers2