cocos2d-iphone - 仅在某个 CCLayer 中禁止方向

Question

在全球范围内，我的游戏支持两种方向：横向右和横向左

在一个子屏幕（继承 CCLayer）中，我需要锁定当前方向，以便......当前方向被锁定......当用户弹回另一个屏幕（CCLayer）时，方向应该再次自由工作。

Answer 1

我是这样做的：

编辑 AppDelegate.h，添加一个用于锁定方向的掩码：

@interface MyNavigationController : UINavigationController <CCDirectorDelegate>
@property UIInterfaceOrientationMask lockedToOrientation;
@end

在 AppDelegate.m 中，合成掩码，替换两个函数：

@synthesize lockedToOrientation; // assign

-(NSUInteger)supportedInterfaceOrientations {
    if (!self.lockedToOrientation) {
        // iPhone only
        if( [[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone )
            return UIInterfaceOrientationMaskLandscape;

        // iPad only
        return UIInterfaceOrientationMaskLandscape;
    }
    else {
        return self.lockedToOrientation;
    }
}

// Supported orientations. Customize it for your own needs
// Only valid on iOS 4 / 5. NOT VALID for iOS 6.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    if (!self.lockedToOrientation) {
        // iPhone only
        if( [[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone )
            return UIInterfaceOrientationIsLandscape(interfaceOrientation);

        // iPad only
        // iPhone only
        return UIInterfaceOrientationIsLandscape(interfaceOrientation);
    }
    else {
        // I don't need to change this at this point
        return NO;
    }
}

然后，每当我需要将界面锁定到某个方向时，我都会在 appdelegate 中访问 navController。检查其 interfaceOrientation 属性并相应地设置锁定掩码

AppController* appdelegate = (AppController*)[UIApplication sharedApplication].delegate;
const UIDeviceOrientation ORIENTATION = appdelegate.navController.interfaceOrientation;
appdelegate.navController.lockedToOrientation = ORIENTATION == UIInterfaceOrientationLandscapeLeft ? UIInterfaceOrientationMaskLandscapeLeft : UIInterfaceOrientationMaskLandscapeRight;

在 dealloc 或每当我想删除锁时，我都会这样做：

    AppController* appdelegate = (AppController*)[UIApplication sharedApplication].delegate;
    appdelegate.navController.lockedToOrientation = 0;