Access the camera flash?

[crivoli]

Can you share any of the code you used to make it successful? I looped through all the AVCapture devices and locked them and set the flash and torch on but to no avail. This seems much trickier than I expected. All I want is a app I can customize to my liking but it's almost more effort than it is worth.

Do you have to bring up the video cam for recording mode before it will work?

Any code examples would be greatly appreciated.

[harrytheshark]

I've attached a project with the basic idea. Hope it helps.

[crivoli]

Originally Posted by harrytheshark

I've attached a project with the basic idea. Hope it helps.

Thanks man. I'll try it out when I go home for lunch.

Also, I see you are from Leeds (I've been there) so I'll plug this: Go USA Bid: Bring the FIFA World Cup back to the United States in 2018/2022

[crivoli]

Originally Posted by harrytheshark

I've attached a project with the basic idea. Hope it helps.

Also, it works well when it is first installed and ran. Once you quit the app anf the flash goes off, the app is still "running" in the background and when it is releaunched the flash will not turn back on. That is curious...

[harrytheshark]

Yeah, you've got to handle that yourself. I just gave you a basic example

[crivoli]

Originally Posted by harrytheshark

Yeah, you've got to handle that yourself. I just gave you a basic example

So, is that better to handle in backgrounding code or to disable backgrounding in the app and start fresh on relaunch? I haven't messed with the multitasking API's yet so my experience is laking there.

Also I greatly appreciate your help. Thanks

[harrytheshark]

I just disabled multitasking, there's no reason for it to even be suspended, because it doesn't take any time to launch and all you're doing is turning the torch on.

[crivoli]

Originally Posted by harrytheshark

I just disabled multitasking, there's no reason for it to even be suspended, because it doesn't take any time to launch and all you're doing is turning the torch on.

That was my thought as well. I would at some point like to fiddle with the backgrounding as well to see what other possibilities it could morph into. If I get something in the next week or so I'll let you know.

[harrytheshark]

Sounds good

[alchemistmuffin]

Originally Posted by harrytheshark

I've attached a project with the basic idea. Hope it helps.

Can't open the zipped file. Goes in endless loop of cpgz file, and etc.

[eski]

Originally Posted by harrytheshark

I've attached a project with the basic idea. Hope it helps.

hey, thanks for posting your project, will be a major help. i dont have my iPhone 4 yet so i cant test it out just yet but was just curious to what it does.
turn on the torch or flash on and off?

and to turn it off do you just need to change ...

[device setTorchMode:AVCaptureTorchModeOn];
[device setFlashMode:AVCaptureFlashModeOn];

to....

[device setTorchMode:AVCaptureTorchModeOff];
[device setFlashMode:AVCaptureFlashModeOff];

or is there something as well as that?

thanks.

[harrytheshark]

To turn it off you stop running the session.

[eski]

Originally Posted by harrytheshark

To turn it off you stop running the session.

what if you put the code in a IBAction button instead of view did load? would it still work?

[harrytheshark]

You can put the code wherever you want.

[alchemistmuffin]

Originally Posted by harrytheshark

I've attached a project with the basic idea. Hope it helps.

HELLO? Anyone? The File just keeps looping into CPGZ File, and it won't open with Unarchiver. Anyone tell me how to open the zip file?

[harrytheshark]

There's no trick to it, just double click the icon.

[bravetarget]

Originally Posted by harrytheshark

To turn it off you stop running the session.

?? you don't have to stop the session ever, just turn it off with the aforementioned code.

[harrytheshark]

Stopping the session works also, and stops the phone grabbing camera data.

[bravetarget]

Originally Posted by harrytheshark

Stopping the session works also, and stops the phone grabbing camera data.

so instead of reinitializing the capture session to turn the flash back on, you just use the one line of code to flip flop it.

[harrytheshark]

Yup

[Vmlweb]

Originally Posted by harrytheshark

I've attached a project with the basic idea. Hope it helps.

I'm getting a

expected specifier-qualifier-list before AVCaptureSession

build error here

@interface TorchViewController : UIViewController {
	
	AVCaptureSession * torchSession;
}

@property (nonatomic, retain) AVCaptureSession * torchSession;

Does anyone know why this is happening?

[harrytheshark]

Include the AVFoundation framework and don't build for the simulator. It only works on a device.

[Vmlweb]

Originally Posted by harrytheshark

Include the AVFoundation framework and don't build for the simulator. It only works on a device.

Ah ok thanks

[holmes2870]

Hi,
I'm making a flashlight app for my beginner Iphone dev class, the app is only for demonstration in class and not for publishing.

I've made a customButton with an IBOutlet and a IBAction and made the connections in interfacebuilder. The button has a Normal and Selected state.

My question is, How do add this code to the IBAction? Do I just past the code in between the curly brackets?

Since I have a Normal and Selected button, I want the first tap to turn the flashlight On and then Off when the button get tapped again.

I'm new to this, so please help me out...

David H.

[blackyE]

Hi guys,

now i can switch off the light but i cant switch the light again on?