页面名为nil 导致iOS极光统计(只做了页面统计)报错

-(void)viewDidAppear:(BOOL)animated
{
      [super viewDidAppear:animated];
      //开始统计
      [JANALYTICSService startLogPageView:self.pageTitle];
}

-(void)viewDidDisappear:(BOOL)animated {
      [super viewDidDisappear:animated];
      //结束统计
      [JANALYTICSService stopLogPageView:self.pageTitle];
}

整个项目统计就用了这两句代码，唯一想到的错误就是这个页面名字了，但是这个页面名我做了为空的判断。真的不知道哪里有问题了

定位到[JANALYTICSPage getJsonObject]
[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[0]