1.0.19 feat：UI 改进 & 修复线上 crash 问题

YuMi/Modules/YMMessage/View/Session/Content/SesssionModel/MessageHeadlinesTextModel.m

@@ -10,6 +10,10 @@
 
 @implementation MessageHeadlinesTextModel
 - (instancetype)initWithMessage:(NIMMessage *)message {
+    if (![message isKindOfClass:[NIMMessage class]] || ![message respondsToSelector:@selector(remoteExt)]) {
+        return nil;
+    }
+
     if (self = [super initWithMessage:message]) {
         self.messageType = SessionMessageType_Text;
         NSDictionary *dic = message.remoteExt[message.from];