cocos2d iphone - Disallow orientation in a certain CCLayer only -

globally game supports 2 orientations: landscape right , landscape left

in 1 subscreen (inheriting cclayer) need lock current orientation ... current orientation locked... when user pops screen (cclayer), orientation should work freely again.

i did this:

edit appdelegate.h, add mask locking orientation:

@interface mynavigationcontroller : uinavigationcontroller <ccdirectordelegate> @property uiinterfaceorientationmask lockedtoorientation; @end 

in appdelegate.m, synthesize mask, , replace 2 functions:

@synthesize lockedtoorientation; // assign  -(nsuinteger)supportedinterfaceorientations {     if (!self.lockedtoorientation) {         // iphone         if( [[uidevice currentdevice] userinterfaceidiom] == uiuserinterfaceidiomphone )             return uiinterfaceorientationmasklandscape;          // ipad         return uiinterfaceorientationmasklandscape;     }     else {         return self.lockedtoorientation;     } }  // supported orientations. customize own needs // valid on ios 4 / 5. not valid ios 6. - (bool)shouldautorotatetointerfaceorientation:(uiinterfaceorientation)interfaceorientation {     if (!self.lockedtoorientation) {         // iphone         if( [[uidevice currentdevice] userinterfaceidiom] == uiuserinterfaceidiomphone )             return uiinterfaceorientationislandscape(interfaceorientation);          // ipad         // iphone         return uiinterfaceorientationislandscape(interfaceorientation);     }     else {         // don't need change @ point         return no;     } } 

then whenever need lock interface orientation, access navcontroller in appdelegate. check interfaceorientation property , set locked mask accordingly

appcontroller* appdelegate = (appcontroller*)[uiapplication sharedapplication].delegate; const uideviceorientation orientation = appdelegate.navcontroller.interfaceorientation; appdelegate.navcontroller.lockedtoorientation = orientation == uiinterfaceorientationlandscapeleft ? uiinterfaceorientationmasklandscapeleft : uiinterfaceorientationmasklandscaperight; 

in dealloc or whenever wanna remove lock, this:

    appcontroller* appdelegate = (appcontroller*)[uiapplication sharedapplication].delegate;     appdelegate.navcontroller.lockedtoorientation = 0;