App畫面設定為Potait時，讓某個畫面可以旋轉

當專案的橫豎設定為時(如圖)

想讓某個畫面可以旋轉(通常會在影音App出現此需求)

第一步

AppDelegate.m

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    NSUInteger orientations = UIInterfaceOrientationMaskAllButUpsideDown;
    
    if(self.window.rootViewController){
        UIViewController *presentedViewController = [[(UINavigationController *)self.window.rootViewController viewControllers] lastObject];
        orientations = [presentedViewController supportedInterfaceOrientations];
    }
    
    return orientations;
}

第二步

你要可以旋轉的ViewController.m

-(BOOL)shouldAutorotate{
    return YES;
}

-(UIInterfaceOrientationMask)supportedInterfaceOrientations{
    return (UIInterfaceOrientationMaskAll);//依據你的需求更換，這邊設定為全部方向允許
}

補充-強制旋轉

UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
if (UIDeviceOrientationIsLandscape(deviceOrientation)) {
[[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];
}