iOS 屏幕旋转

第一种

xocde中选中此选项

在基类控制器,RootTableViewController,RootNaviViewController,RootViewController中添加如下

--> RootTableViewController
- (BOOL)shouldAutorotate
{
    UIViewController *vc = self.viewControllers[self.selectedIndex];
    if ([vc isKindOfClass:[UINavigationController class]]) {
        UINavigationController *nav = (UINavigationController *)vc;
        return [nav.topViewController shouldAutorotate];
    } else {
        return [vc shouldAutorotate];
    }
}
- (UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    UIViewController *vc = self.viewControllers[self.selectedIndex];
    if ([vc isKindOfClass:[UINavigationController class]]) {
        UINavigationController *nav = (UINavigationController *)vc;
        return [nav.topViewController supportedInterfaceOrientations];
    } else {
        return [vc supportedInterfaceOrientations];
    }
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    UIViewController *vc = self.viewControllers[self.selectedIndex];
    if ([vc isKindOfClass:[UINavigationController class]]) {
        UINavigationController *nav = (UINavigationController *)vc;
        return [nav.topViewController preferredInterfaceOrientationForPresentation];
    } else {
        return [vc preferredInterfaceOrientationForPresentation];
    }
}

--> RootNaviViewController
- (BOOL)shouldAutorotate
{
    return self.topViewController.shouldAutorotate;
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    return self.topViewController.supportedInterfaceOrientations;
}

// 默认的屏幕方向（当前ViewController必须是通过模态出来的UIViewController（模态带导航的无效）方式展现出来的，才会调用这个方法）
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return [self.topViewController preferredInterfaceOrientationForPresentation];
}

--> RootViewController
- (BOOL)shouldAutorotate {
    return NO;
}

// 支持哪些屏幕方向
- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskPortrait;
}

// 默认的屏幕方向（当前ViewController必须是通过模态出来的UIViewController（模态带导航的无效）方式展现出来的，才会调用这个方法）
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationPortrait;
}
在继承RootViewController 中添加重写以上方法

如果A屏幕是横屏,跳到B屏幕为竖屏,需要强制转屏
- (void)interfaceOrientation:(UIInterfaceOrientation)orientation
{
    if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
        SEL selector             = NSSelectorFromString(@"setOrientation:");
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
        [invocation setSelector:selector];
        [invocation setTarget:[UIDevice currentDevice]];
        int val = orientation;
        [invocation setArgument:&val atIndex:2];
        [invocation invoke];
    }
}

第二种

xcode中没有勾选此项

在APPDelegate中添加以下方法与属性.在想要旋转的控制器里,更改" isEnable "
的值.

@property (assign, nonatomic) BOOL  isEnable;

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    if (self.isEnable) {
        return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskPortrait;
    } else {
        return UIInterfaceOrientationMaskPortrait;
    }
}