iOS退出程序的代码

//        AppDelegate *app = [UIApplication sharedApplication].delegate;
//        UIWindow *window = app.window;
        
//        [UIView animateWithDuration:1.0f animations:^{
//            window.alpha = 0;
//            window.frame = CGRectMake(0, window.bounds.size.width, 0, 0);
//        } completion:^(BOOL finished) {
//            exit(0);

//        }];