iOS 屏幕旋转 nav+tabbar+present(网页) 2016
如题,最近一个app架构为 nav + tabbar ,需求是 在点击tabbar中的一个菜单项时,弹出网页,该网页需要横屏显示,其他页面不变 都保持竖屏。
XCode Version 7.2.1
网上一搜,都说到在nav或者tabbar中设置以下3个方法。
-(UIInterfaceOrientationMask)supportedInterfaceOrientations { return UIInterfaceOrientationMaskPortrait ; } - (BOOL)shouldAutorotate { return NO; } -(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation { return UIInterfaceOrientationPortrait; }
确实实现了横屏的需求,但是发现了一个bug:
当app在横屏的时候 运行app 界面就是横屏了,虽然进入关闭网页时可以显示回正常竖屏,但是。。。。
最终 参考了一个老外的做法。传送门
该实现方式主要代码为:在AppDelegate中添加以下方法
- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window { // Get topmost/visible view controller UIViewController *currentViewController = [self topViewController]; // Check whether it implements a dummy methods called canRotate if ([currentViewController respondsToSelector:@selector(canRotate)]) { // Unlock landscape view orientations for this view controller if ([currentViewController isKindOfClass:[ViewController1 class]]) { if(((ViewController1 *)currentViewController).isShowPortrai){ return UIInterfaceOrientationMaskPortrait; }else{ return UIInterfaceOrientationMaskLandscapeRight; } } return UIInterfaceOrientationMaskLandscapeRight; } // Only allow portrait (standard behaviour) return UIInterfaceOrientationMaskPortrait; } - (UIViewController*)topViewController { return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController]; } - (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController { if ([rootViewController isKindOfClass:[UITabBarController class]]) { UITabBarController* tabBarController = (UITabBarController*)rootViewController; return [self topViewControllerWithRootViewController:tabBarController.selectedViewController]; } else if ([rootViewController isKindOfClass:[UINavigationController class]]) { UINavigationController* navigationController = (UINavigationController*)rootViewController; return [self topViewControllerWithRootViewController:navigationController.visibleViewController]; } else if (rootViewController.presentedViewController) { UIViewController* presentedViewController = rootViewController.presentedViewController; return [self topViewControllerWithRootViewController:presentedViewController]; } else { return rootViewController; } }
其中改造部分为:
if(((ViewController1 *)currentViewController).isShowPortrai){ return UIInterfaceOrientationMaskPortrait; }else{ return UIInterfaceOrientationMaskLandscapeRight; }
完美实现此效果:进入app时竖屏,进入网页时横屏,关闭网页时返回竖屏。 特此记录
注:只需在项目中设置下图(默认设置),参考demo实现即可。 其中左右旋转看需求设置