string(244) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E6%B8%85%E7%90%86%E8%8B%B9%E6%9E%9Cipad%E5%86%85%E5%AD%98 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
怎么清理苹果ipad内存
