访问使用PhantomJS评估错误

Question

我有这样漂亮的代码多个URL，所有我想要做访问之间有些停顿，所以我添加了一个“的setInterval”，但这不工作：

var page = require('webpage').create(); 

// the urls to navigate to 
var urls = [ 
    'http://blogger.com/', 
    'https://github.com/', 
    'http://reddit.com/' 
       ]; 
    var i = 0; 

// the recursion function 
var genericCallback = setInterval(function() { 
    return function (status) { 
     console.log("URL: " + urls[i]); 
     console.log("Status: " + status); 
     // exit if there was a problem with the navigation 
     if (!status || status === 'fail') phantom.exit(); 

     i++; 

     if (status === "success") { 

      //-- YOUR STUFF HERE ---------------------- 
      // do your stuff here... I'm taking a picture of the page 
      page.render('example' + i + '.png'); 
      //----------------------------------------- 

      if (i < urls.length) { 

       // navigate to the next url and the callback is this function (recursion) 
       page.open(urls[i], genericCallback()); 

      } else { 
       // try navigate to the next url (it is undefined because it is the last element) so the callback is exit 
       page.open(urls[i], function() { 
        phantom.exit(); 
       }); 
      } 
     } 
    }; 
},2000); 

// start from the first url 
page.open(urls[i], genericCallback()); 

与截图错误我得到： 也许有人可以帮助我，并医治此代码？因为我对JS和PhantomJS都很陌生，所以任何帮助都会令人满意。 我从另一个计算器的答案在这里的代码 - Using Multiple page.open in Single Script 但

Answer 1

它应该是这样的，我不能给笔者发表评论，因为我没有50美誉：

var page = require('webpage').create(); 

var urls = ['http://blogger.com/','https://github.com/','http://reddit.com/']; 
var i = 0; 

function OpenPage(){ 
    setTimeout(function(){ 
     page.open(urls[i], function(status) { 
      if (status == 'success') { 
        page.render('example' + i + '.png'); 
      } 
      i++; 
      if(i <= urls.length - 1){ 
       OpenPage(); 
      }else{ 
       phantom.exit(); 
      } 
     }); 
    },2000); 
} 

OpenPage();