MBProgressHUD中0.7版本在ios11上面的小坑

之前没注意，今天更新了系统，突然发现MBProgressHUD不显示了，要么就是一直显示不隐藏，这是个啥意思呀？
因为我的MBProgressHUD比较古老了，是Version 0.7的，所以正常显示的小伙伴就不要改动了。
研究下原来发现问题：
首先说显示：

+ (MB_INSTANCETYPE)showHUDAddedTo:(UIView *)view animated:(BOOL)animated {    MBProgressHUD *hud = [[self alloc] initWithView:view];    [view addSubview:hud];    [hud show:animated];    return MB_AUTORELEASE(hud);}

以前写的的时候是：

if (view == nil) view = [[UIApplication sharedApplication].windows lastObject]; MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:view animated:YES];

现在不行了，我改为：

if (view == nil) view = [UIApplication sharedApplication].keyWindow;; MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:view animated:YES];

再说隐藏：

+ (BOOL)hideHUDForView:(UIView *)view animated:(BOOL)animated {    if (view == nil) view = [[UIApplication sharedApplication].windows lastObject];    MBProgressHUD *hud = [self HUDForView:view];    if (hud != nil) {        hud.removeFromSuperViewOnHide = YES;        [hud hide:animated];        return YES;    }    return NO;}

改为：

+ (BOOL)hideHUDForView:(UIView *)view animated:(BOOL)animated {     if (view == nil) view = [UIApplication sharedApplication].keyWindow;    MBProgressHUD *hud = [self HUDForView:view];    if (hud != nil) {        hud.removeFromSuperViewOnHide = YES;        [hud hide:animated];        return YES;    }    return NO;}

还有一处方法：
以前用法：

_hud = [MBProgressHUD showHUDAddedTo:[[UIApplication sharedApplication].windows lastObject] animated:YES];

改为

//_hud = [MBProgressHUD showHUDAddedTo:[UIApplication sharedApplication].keyWindow animated:YES];//不要改成这样，因为改完发现会一闪而过。 _hud = [MBProgressHUD showHUDAddedTo:[UIApplication sharedApplication].delegate.window animated:YES];

这样就可以正常显示了，别问我为什么，我也不知道为什么，有时间再去研究吧。