iOS 退出登录

// 获得根窗口

    UIWindow *window = [[[UIApplication
sharedApplication] delegate]
window]; 

//获取到登录界面的跟视图

    ViewController *VC=[[ViewController
alloc] init];

    VC.view.backgroundColor=[UIColor
groupTableViewBackgroundColor];

//添加导航

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

//设置跟视图

    window.rootViewController = nav;

//添加切换动画

    CATransition *myTransition=[CATransition
animation];//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: [UIColor
whiteColor],NSFontAttributeName : [UIFont
boldSystemFontOfSize:18]};

    myTransition.type =
kCATransitionFade;//子类型

    [window.layer
addAnimation:myTransition forKey:nil];