I want to detect the event when the iOS device goes to sleep and the screen blackens?
Is there any way to do it?
Showing posts with label sleep. Show all posts
Showing posts with label sleep. Show all posts
Thursday, January 17, 2013
Is there a way to detect the event when device goes to sleep and the screen blackens?
I want to detect the event when the iOS device goes to sleep and the screen blackens?
Is there any way to do it?
Thursday, January 10, 2013
Re: Is there a way to check if the iOS device is in sleep mode?
I want to detect the lock/unlock events in the device, so far I got the darwin notifications as given below,:
-(void)registerForDarwinNotif
{
//Screen lock notifications
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
NULL, // observer
displayStatusChanged, // callback
CFSTR("com.apple.iokit.hid.displayStatus"), // event name
NULL, // object
CFNotificationSuspensionBehaviorDeliverImmediately);
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
NULL, // observer
displayStatusChanged, // callback
CFSTR("com.apple.springboard.lockstate"), // event name
NULL, // object
CFNotificationSuspensionBehaviorDeliverImmediately);
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), //center
NULL, // observer
displayStatusChanged, // callback
CFSTR("com.apple.springboard.hasBlankedScreen"), // event name
NULL, // object
CFNotificationSuspensionBehaviorDeliverImmediately);
}
//My call back
static void displayStatusChanged(CFNotificationCenterRef center, void *observer, CFStringRef name, const void *object, CFDictionaryRef userInfo)
{
NSLog(@"IN Display status changed");
// you might try inspecting the `userInfo` dictionary, to see
// if it contains any useful info
NSLog(@"Darwin notification NAME = %@",name);
}
I am able to get the darwin notifications when device is locked/unlocked, but the real problem is how identify between if the notification has come from locking or the unlocking of the device. Console logs are:
Jan 10 11:29:01 Frost-bank LockDetectDemo[2086]
Jan 10 11:29:01 Frost-bank LockDetectDemo[2086]
Jan 10 11:29:01 Frost-bank LockDetectDemo[2086]
Jan 10 11:29:01 Frost-bank LockDetectDemo[2086]
Jan 10 11:29:01 Frost-bank LockDetectDemo[2086]
Jan 10 11:29:01 Frost-bank LockDetectDemo[2086]
Jan 10 11:29:01 Frost-bank LockDetectDemo[2086]
Jan 10 11:29:01 Frost-bank LockDetectDemo[2086]
Wednesday, January 9, 2013
Is there a way to check if the iOS device is in sleep mode?
Hi All,
I have used GPS location updates in my application. I want to detect if the iOS device is in sleep mode so that I can turn off the GPS and optimize the battery use. I have already tried pausesLocationupdates in iOS 6, but it does not work as desired.
I want to turn off the GPS as soon as the device goes to sleep mode. Is there any way to achieve this functionality ?
Thanks in advance.
Is there a way to check if the iOS device is in sleep mode?
Hi All,
I have used GPS location updates in my application. I want to detect if the iOS device is in sleep mode so that I can turn off the GPS and optimize the battery use. I have already tried pausesLocationupdates in iOS 6, but it does not work as desired.
I want to turn off the GPS as soon as the device goes to sleep mode. Is there any way to achieve this functionality ?
Thanks in advance.
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