不记录屏幕显示时间为空情况

GMPhobos/Classes/Phobos.m

@@ -321,6 +321,7 @@ static NSString *sdkVersion = @"110";
         [dict setObject:@(0) forKey:@"fake"];
         [dict setObject:page.referrerId ? : @"" forKey:@"referrer_id"];
         [dict setObject:page.extraParam ? : @"" forKey:@"extra_param"];
+        NSAssert(page.inTime.length > 0, @"页面显示时间不能为空!");
         [Phobos track:@"page_view" attributes:dict];
     }
     @catch (NSException *exception) {