Identifying host device « cocos2d for iPhone

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Identifying host device

(10 posts) (5 voices)

Started 1 year ago by Dragyn
Latest reply from huika

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Dragyn
Member

Is there an easy way to identify what device an app is running on? Obviously, you can check for scaling to identify an iPhone 4, check for the IDIOM to identify an iPad, but how can you differentiate between everything up to and including the 3GS?

Basically, I want to include a feature in my games that will automatically enable/disable non-essential effects on older, slower devices, rather than suffer from dogging performance. I was thinking if I could identify the device generation, then I could drop out some elements/options for 1st Gen devices. I had considered trying to capture/calculate the fps, and if it is below a certain point, disable some features. (i.e. "fluff" particle systems, extra animation, etc)

Anyone attempted such a feat? What is the best way to accomplish this checking without wasting too many vital CPU cycles?

(As an aside, I know cocos has the on-screen fps. Can we tap into that value from the code itself without modifying the base cocos code?)

Posted 1 year ago #
finder39
Member

I am also looking for the ability to do this

Posted 1 year ago #
opetopic
Member
Well, one thing that differentiates the older devices from the new ones is the use of OpenGL ES 2.0 versus 1.1. So, you could try to create an OpenGL ES 2.0 context, and if it fails then you know you must be on an iPhone 3G or earlier, or an iPod touch 2nd gen or before (and even some 3rd gens, see wikipedia).

OR, if you are building a "fat binary" (i.e. building for both arm6 and arm7), then you can use the __ARM_NEON__ compile flag to differentiate "faster" and "slower" devices. For example:
```
#ifdef __ARM_NEON__
// fancy graphics stuff here
#else
// not so fancy stuff here
#endif
```
Both of these methods don't waste cpu cycles at all. In the first case you would just detect the ability to create an ES 2.0 context and save the result to a global BOOL (something like UIDeviceIsFast). In the second case, you are compile separate code for the the slow devices and fast devices.
Posted 1 year ago #
huika
Member

Hey, this might help
http://www.cocos2d-iphone.org/forum/topic/8233#post-47883

Posted 1 year ago #
Dragyn
Member

@huika: Thanks - for some reason I hadn't come across that thread, and it's pretty much exactly what I was looking for.

Posted 1 year ago #
huika
Member

No problem, I'm happy it got good use :)

Posted 1 year ago #
cocos
Member

@huika: Thanks! I am curios if we can access serial number of the device?

Posted 1 year ago #
huika
Member
Hi there

I'm just beginning to learn cocos2d, in fact I'm a 3d generalist, I've began learning Objective c 2 months ago Lol :)

Didn't tested myself, but you could try this:
```
NSString *num = [[NSUserDefaults standardUserDefaults]
                           stringForKey:@"SBFormattedPhoneNumber"];

NSLog(@"Phone Number: %@", num);
```
It's here: http://www.timeister.com/2009/06/objective-c-get-iphone-number/

See ya!
Posted 1 year ago #

cocos
Member

UIDevice *device = [UIDevice currentDevice];
NSString *uniqueIdentifier = [device uniqueIdentifier];
[device release];
NSLog(@”Device GUID: %@”, uniqueIdentifier);

Identifying host device

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