使用代码退出应用程序，带动画。

AppDelegate *app = [UIApplication sharedApplication].delegate;
    UIWindow *window = app.window;
    
    [UIView animateWithDuration:0.4f animations:^{
        window.alpha = 0;
        CGFloat y = window.bounds.size.height;
        CGFloat x = window.bounds.size.width / 2;
        window.frame = CGRectMake(x, y, 0, 0);
    } completion:^(BOOL finished) {
        exit(0);
    }];