兼容避免前端发的消息携带null字段

TUIKit/TUIChat/UI_Classic/Cell/Custom/TUIOrderCell.m

@@ -46,10 +46,24 @@
     [super fillWithData:data];
 
     self.customData = data;
+    
+    if (![data.title isKindOfClass:[NSNull class]] && data.title != nil) {
         self.titleLabel.text = data.title;
+    } else {
+        self.titleLabel.text = @""; // 或者空字符串 @""
+    }
+    
+    if (![data.desc isKindOfClass:[NSNull class]] && data.desc != nil) {
         self.descLabel.text = data.desc;
+    } else {
+        self.descLabel.text = @""; // 或者空字符串 @""
+    }
+    if (![data.price isKindOfClass:[NSNull class]] && data.price != nil) {
         self.priceLabel.text = data.price;
-    if (data.imageUrl == nil) {
+    } else {
+        self.priceLabel.text = @""; // 或者空字符串 @""
+    }
+    if (data.imageUrl == nil || [data.imageUrl isKindOfClass:[NSNull class]]) {
         [self.iconView setImage:TUIChatBundleThemeImage(@"chat_custom_order_message_img", @"message_custom_order")];
     } else {
         [self.iconView sd_setImageWithURL:[NSURL URLWithString:data.imageUrl]];