Disable rotation on Portrait

[masterkitano]

Hello, Im new on Cocos2D development, Im making an app on 3.0 wich requires to be on portrait mode, but also, it shouldn't rotate when the user rotates the iphone. I've seen examples on cocos2d 2.0 but none of those seems to work with 3.0. does anyone knows how to solve this?. thx in advance.

[kalo]

setting the CCSetupScreenOrientation key to CCScreenOrientationPortrait in the cocos2d setup options dictionary of the application delegate will start the application in portrait mode.

if you are using the startup templates from the cocos2d v3 installation there will be an app delegate with a number of different settings you can fiddle with, and the orientation setting will be among them.

[masterkitano]

thx for the response, yup, actually I tried that, but when I set up CCScreenOrientationPortrait it setup both Portrait and upside down. However, I've found the solution, however I would like to know if there is a better way to do it:

I took a dig into the CCAppDelegate.m file from cocos2d libs, and found this method:

-(NSUInteger) supportedInterfaceOrientations
{
    if([_screenOrientation isEqual:CCScreenOrientationLandscape])
    {
        return UIInterfaceOrientationMaskLandscape;
    }
    else
    {
        return UIInterfaceOrientaionMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
    }
}

so as you can see its taking both Portrait and upsideDown. so my solution was to remove UIInterfaceOrientationMaskPortraitUpsideDown from the or comparation to force only portait when using CCScreenOrientationPortrait.

-(NSUInteger) supportedInterfaceOrientations
{
    if([_screenOrientation isEqual:CCScreenOrientationLandscape])
    {
        return UIInterfaceOrientationMaskLandscape;
    }
    else
    {
        return UIInterfaceOrientaionMaskPortrait;
    }
}

hope this helps to someone having the same problem as I.

[kalo]

yes, that is the correct way to allow only standing portrait.

i'll also note that if you are compiling with compatibility for any version of ios 5 or below you will want to make a similar change to the shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation) in the CCNavigationController because autorotation is handled differently on the older os.

...
//return UIInterfaceOrientationIsPortrait(interfaceOrientation);
return interfaceOrientation == UIInterfaceOrientationPortrait;
...

[masterkitano]

ooh, cool!, I totally missed that, thx a lot!!

[yetanothersignu]

Bump. I found another place where I needed to force portrait only, in code:

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
	//NSLog(@"supportedInterfaceOrientationsForWindow");
	return UIInterfaceOrientationMaskPortrait;
//	return UIInterfaceOrientationMaskAll;
}

Not sure where this function came from, if it's from iOS or just part of cocos2d. However without it I could rotate my device to landscape and any UIAlertView would rotate with it! (but not the cocos2d graphics) - this really made things look ugly. Oh yeah my game is supposed to be portrait only.

[yetanothersignu]

• (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window { //NSLog(@"supportedInterfaceOrientationsForWindow"); return UIInterfaceOrientationMaskPortrait; // return UIInterfaceOrientationMaskAll; }

This helped me a 2nd time. Not sure if this is really fixed in latest Cocos2D (I had SB update my project), but my project stems from last summer and its possible that the SB updater does not touch AppDelegate and related parts concerning orientation. I had to add application:supportedInterfaceOrientationsForWindow: yet again to a portrait-only app or the app would allow rotating UIAlertView:s to landscape mode... it looked really ugly, the half-dimmed background would rotate along, so that only part of the background would be darkened... Well it shouldn't allow UIAlertView:s (and possibly other UI stuff) to rotate when forced to either portrait or landscape in the first place. I want to +1 my own comment.