iOS 退出登录

// 获得根窗口

    UIWindow *window = [[[UIApplicationsharedApplication] delegate]window]; 

//获取到登录界面的跟视图

    ViewController *VC=[[ViewControlleralloc] init];

    VC.view.backgroundColor=[UIColorgroupTableViewBackgroundColor];

//添加导航

    UINavigationController *nav = [[UINavigationControlleralloc] initWithRootViewController:VC];

//设置跟视图

    window.rootViewController = nav;

//添加切换动画

    CATransition *myTransition=[CATransitionanimation];//创建CATransition

    myTransition.duration=0.35;//持续时长0.35秒

    myTransition.timingFunction=UIViewAnimationCurveEaseInOut;//计时函数，从头到尾的流畅度

//设置导航栏颜色

    nav.navigationBar.barTintColor=loginColor;

//字体设置

    nav.navigationBar.titleTextAttributes =@{NSForegroundColorAttributeName: [UIColorwhiteColor],NSFontAttributeName : [UIFontboldSystemFontOfSize:18]};

    myTransition.type =kCATransitionFade;//子类型

    [window.layeraddAnimation:myTransition forKey:nil];