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Description

MMPDeepSleepPreventer is an Objective-C class used to prevent iOS devices from deep sleeping. This has been tested on an iOS versions 3.0 to 5.0, so far and should work on all devices running one of these iOS versions.

MMPDeepSleepPreventer is released under the New BSD License. (Below is the exact license text). If you use this code a little attribution note would be greatly appreciated.

How-To Use

  • Add MMPDeepSleepPreventer.h and MMPDeepSleepPreventer.m as well as MMPSilence.wav to your project.
  • Add “AVFoundation.framework” and “AudioToolbox.framework” to your project.
  • Add audio to the array for the UIBackgroundModes key in your Info.plist
  • Import MMPDeepSleepPreventer.h where you want to use the class.
  • Instantiate an MMPDeepSleepPreventer object.
  • Use -[MMPDeepSleepPreventer startPreventSleep] and -[MMPDeepSleepPreventer stopPreventSleep] when needed. Do this before the app actually moves to background.

App Store compatibility

As of August 2012, setting the audio flag in UIBackgroundModes when you are, in fact, not playing any audible audio is likely to get your app rejected.

Inspired by

  • Some question on stackoverflow.com
  • Some posts on Apple's devforums.

License

Copyright (c) 2009-2011, Marco Peluso - marcopeluso.com All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

  3. Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.