<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[ning_213的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/ning_213</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; ning_213]]></copyright><item><title><![CDATA[swiper自动播放bug]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/82263447</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/82263447</guid><author>ning_213</author><pubDate>Fri, 31 Aug 2018 23:47:20 +0800</pubDate><description><![CDATA[在引入js的时候，zepto.min.js要在swiper.jquery.min.js前面，不然会出现自动播放不了bug]]></description><category></category></item><item><title><![CDATA[zepto的swipe失效问题]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/82263207</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/82263207</guid><author>ning_213</author><pubDate>Fri, 31 Aug 2018 23:09:09 +0800</pubDate><description><![CDATA[在移动事件的元素上面加入css 属性 touch-action: none; 禁止所有的默认事件，就好使了。

从 chrome56 开始，在 window、document 和 body 上注册的 touchstart 和 touchmove 事件处理函数，会默认为是 passive: true。浏览器忽略 preventDefault() 就可以第一时间滚动了。如果在以上这 3 个元素的 to...]]></description><category></category></item><item><title><![CDATA[js获取select选中的值]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/81779609</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/81779609</guid><author>ning_213</author><pubDate>Fri, 17 Aug 2018 16:26:57 +0800</pubDate><description><![CDATA[var obj = document.getElementByIdx_x(”testSelect”); //定位id

var index = obj.selectedIndex; // 选中索引

var text = obj.options[index].text; // 选中文本

var value = obj.options[index].value; // 选中值

 

jQuery...]]></description><category></category></item><item><title><![CDATA[中间件的使用]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/81369478</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/81369478</guid><author>ning_213</author><pubDate>Thu, 02 Aug 2018 23:31:20 +0800</pubDate><description><![CDATA[1创建一个爬虫项目，然后设置items信息


import scrapy


class DoubanItem(scrapy.Item):
    # define the fields for your item here like:
    # 标题
    title = scrapy.Field()
    # 信息
    bd = scrapy.Field()
    # 评分
  ...]]></description><category></category></item><item><title><![CDATA[正统模拟登录方法]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/81354820</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/81354820</guid><author>ning_213</author><pubDate>Thu, 02 Aug 2018 10:54:50 +0800</pubDate><description><![CDATA[
 # coding:utf-8
  2 
  3 import scrapy
  4 
  5 # 正统模拟登录方法，首先用get请求获取到页面里登录必须的参数，例如知乎的_zsrf
  6 # 然后和账号密码一起post到服务器，登录成功
  7 class RenrenSpider(scrapy.Spider):
  8     name = &quot;ren&quot;
  9     allowed_do...]]></description><category></category></item><item><title><![CDATA[只需要提供post数据的模拟登录方法]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/81354169</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/81354169</guid><author>ning_213</author><pubDate>Thu, 02 Aug 2018 10:32:36 +0800</pubDate><description><![CDATA[
# -*- coding: utf-8 -*-
import scrapy

# 只要是需要提供post数据的，就可以用这种方法，
# 下面示例：post数据是账户密码
class Renren1Spider(scrapy.Spider):
    name = &quot;renren1&quot;
    allowed_domains = [&quot;renren.com&quot;]

    def start_reque...]]></description><category></category></item><item><title><![CDATA[用crawlspider方法爬取东莞阳光网]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/81322267</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/81322267</guid><author>ning_213</author><pubDate>Tue, 31 Jul 2018 22:53:43 +0800</pubDate><description><![CDATA[1.创建一个爬虫项目



2.创建一个爬虫文件



3.打开items，保存需要的信息



4.编写爬虫文件



5.编写管道文件



6.打开settings,设置头部信息



设置管道信息



当某些网址代理进不去需要设置



7.scrapy crawl dongguan...]]></description><category></category></item><item><title><![CDATA[用CrawlSpider方法爬腾讯招聘信息]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/81292986</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/81292986</guid><author>ning_213</author><pubDate>Mon, 30 Jul 2018 22:00:27 +0800</pubDate><description><![CDATA[1.创建一个项目



2.创建一个crawlspider方法的爬虫文件



3.编写items文件，保存需要的数据



4.编写爬虫文件



5.编写管道文件



6.打开settings文件，编写管道信息已经日志





7.scrapy crawl tencent...]]></description><category></category></item><item><title><![CDATA[用scrapy爬斗鱼颜值版块的图片]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/81266297</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/81266297</guid><author>ning_213</author><pubDate>Sat, 28 Jul 2018 22:59:50 +0800</pubDate><description><![CDATA[1.创建一个项目



2.创建一个爬虫



3.打开items.py编写需要保存的参数



4.进入spider文件夹，编写爬虫文件

 

5.打开settings文件，设置headers、pipeline、下载间隔以及图片保存路径









6.设置管道文件



7.scrapy crawl douyu

 ...]]></description><category></category></item><item><title><![CDATA[利用xpath爬取贴吧时返回的列表为空的问题解决方法]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/81104674</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/81104674</guid><author>ning_213</author><pubDate>Wed, 18 Jul 2018 20:27:04 +0800</pubDate><description><![CDATA[不同的浏览器,web服务器发送的页面也会不同,ie浏览器是标准的，所以不管任何服务器发送给ie的页面都是标准的，所以我们在用xpath解释页面的时候用的请求头要用IE的User-Agent...]]></description><category></category></item><item><title><![CDATA[mongodb常发生的几个错误]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/80955442</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/80955442</guid><author>ning_213</author><pubDate>Sat, 07 Jul 2018 22:37:08 +0800</pubDate><description><![CDATA[问题1：exception in initandlisten 29 data directory /data/db not found解决思路：cd到/usr/local/mongodb/ 然后用root权限创建db文件。sudo mkdir -p /data/db问题2：shutting down with code:100解决思路：用sudo mongod 启动mongod...]]></description><category></category></item><item><title><![CDATA[python2.X 打印输出时如何不换行]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/80946462</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/80946462</guid><author>ning_213</author><pubDate>Fri, 06 Jul 2018 21:28:11 +0800</pubDate><description><![CDATA[在打印的数据后面加,  例如 print i ,]]></description><category></category></item><item><title><![CDATA[引号引起的语法错误问题]]></title><link>https://blog.youkuaiyun.com/ning_213/article/details/80943822</link><guid>https://blog.youkuaiyun.com/ning_213/article/details/80943822</guid><author>ning_213</author><pubDate>Fri, 06 Jul 2018 17:19:07 +0800</pubDate><description><![CDATA[当一个字符串出现两对引号的时候，要分单双引号以示区分， https://www.cnblogs.com/to-creat/p/5968877.html]]></description><category></category></item></channel></rss>