fix 视频面诊主要数据加载失败 navigationbar 被遮挡的问题

GMAILab/Classes/AddClass/GMFacePagingViewController.m

@@ -21,6 +21,18 @@
     [self addNotification];
 }
 
+- (void)showEmptyView:(GMEmptyViewType)type {
+    [super showEmptyView:type];
+    if (self.emptyView.superview != nil) {
+        [self.emptyView mas_remakeConstraints:^(MASConstraintMaker *make) {
+            make.left.mas_equalTo(0);
+            make.right.mas_equalTo(0);
+            make.top.mas_equalTo(OCNavigationBar.barHeight);
+            make.bottom.mas_equalTo(0);
+        }];
+    }
+}
+
 - (void)addNotification {
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(click_status:) name:@"appdelegate_touch_status" object:self.subViewVc];
 }