Ios – ny type of partial wake lock mechanism in ios

iosiphoneobjective cwakelock

In android if you hold a partial wake lock, the CPU will continue to run, regardless of any display timeouts or the state of the screen and even after the user presses the power button. In all other wake locks, the CPU will run, but the user can still put the device to sleep using the power button. Is there any such mechanism in iOS like this? For CPU will continue to run and detecting the gestures and Sensors while device is in lock screen.

Best Answer

No. This is deliberately not available and hidden by Apple to conserve battery life. The only background modes to allow this, where your app is basically always executing in the background and the device does not go to sleep (but screen can be off), are VOIP and location services. To prevent abuse of these background modes, Apple reviewers are much harder on apps that specify these modes in their plist file, to make sure the apps really require these modes.

If you intend to make an enterprise app, which will not go to the app store, you can of course use these modes, as well as private API, to achieve what you wish.

Related Solutions

Android – Partial wake lock is not working

I was also facing the same problem and finally found the solution which works perfectly.

Try to acquire the wake lock by extending Application class: Code:

package com.example.MyApp.UserView;

import android.app.Application;
import android.content.Intent;
import android.os.PowerManager;
import android.provider.Settings;

/**
 * @author SDurai
 * 
 */
public class MyApp extends Application 
{
    private static final String TAG = MyApp.class.getSimpleName();
    private PowerManager.WakeLock mWakeLock = null;

    @Override
    public void onCreate() {
        super.onCreate();

        final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
        mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
        mWakeLock.acquire();
    }

    @Override
    public void onTerminate() {
        if (mWakeLock.isHeld())
            mWakeLock.release();
        super.onTerminate();
    }
}

Let me know if you have any other doubts. Ready to help!

Java – Android Power Manager Wake Lock

As you are saying that you do release wake lock in onPause() and acquire in onResume(). That is a good practice however alongwith these I suggest you to release wakelock in onUserLeaveHint() as well.

onUserLeaveHint()

@Override
protected void onUserLeaveHint() {

try {
     // your code.

     // release the wake lock
     wl.release();

    }catch(Exception ex){
     Log.e("Exception in onUserLeaveHint", ex.getMessage);
    }
    super.onUserLeaveHint();
}

Best Answer

Related Solutions

Android – Partial wake lock is not working

Java – Android Power Manager Wake Lock

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