phonegap, iphone and the big bad idleTimerDisabled

Question

reading a lot about how to prevent iphone goingto sleep while running my app I am very unhappy at the moment because nothing worked..

here I read about the idea to set up a timer for every 30 seconds to set the idleTimerDisabled to NO and then YES, but my objC isn't that good yet. could anybody tell me how (and where)?

thnx!

edit: here is the code I tried:

- (void)applicationDidFinishLaunching:(UIApplication *)application
{   
    [ super applicationDidFinishLaunching:application ];
    //application.idleTimerDisabled = NO;
    //application.idleTimerDisabled = YES;
    //[[UIApplication sharedApplication] setIdleTimerDisabled:YES];
    [UIApplication sharedApplication].idleTimerDisabled = NO;
    [UIApplication sharedApplication].idleTimerDisabled = YES;


}

edit2: after that I tried to start a loop with:

-(void)_timerLoop
{
    // add this function up the top.  it's what will happen when the
    // timer goes off:
    NSLog(@"Your timer went off!!!");
}


/**
 * This is main kick off after the app inits, the views and Settings are setup here.
 */
- (void)applicationDidFinishLaunching:(UIApplication *)application
{   
    [ super applicationDidFinishLaunching:application ];
    //application.idleTimerDisabled = NO;
    //application.idleTimerDisabled = YES;
    //[[UIApplication sharedApplication] setIdleTimerDisabled:YES];
    //[UIApplication sharedApplication].idleTimerDisabled = NO;
    //[UIApplication sharedApplication].idleTimerDisabled = YES;
    [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(_timerLoop) userInfo:nil repeats:YES];


}

edit3: you really can't change accidentially downvotes? would be a nice chnage request to the stackoverflow system!

Answer 1

Regarding your question about using a timer:

Here is how you make a timer go off (just once) in 30 seconds from now:

-(void)_jump
{
// add this function up the top.  it's what will happen when the
// timer goes off:
NSLog(@"Your timer went off!!!");
}
...
// here's how to create the timer, which will go off in 30 seconds
[NSTimer scheduledTimerWithTimeInterval:30.0
   target:self selector:@selector(_jump) userInfo:nil repeats:NO]

If you want two different timers, after say 30 and then 60 seconds, just make two in the same way. Let me know if you need more help with timers!

---

It couldn't be easier. Just add this line:

application.idleTimerDisabled = YES;

Inside your "application didFinishLaunchingWithOptions" routine.

You will find that routine inside your app delegate .m source code file.

Be sure to add it BEFORE the "return YES;" statement - a common mistake! So, exactly like this:

-(BOOL)application:(UIApplication *)application
            didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
    {
    // blah blah ...

    application.idleTimerDisabled = YES;
    return YES;
    }

Answer 2

Just setting [UIApplication sharedApplication].idleTimerDisabled = YES; in

• (BOOL) application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions

works well for me. However, there is a caveat. I have noticed that every time I invoke camera utility from my phonegap app to take a snapshot, idleTimerDisable gets set to NO behind the scene. So right after i upload my image, I had call the following line of code again:

[UIApplication sharedApplication].idleTimerDisabled = YES;

Also, I would not be surprised if there are more places throughout the app idle timer gets reenabled.