关于ios的http连接问题

访问http连接出错：
domain: @"NSURLErrorDomain" - code: 18446744073709550594

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

<key>NSAppTransportSecurity</key>

<true/>

<key>NSAllowsArbitraryLoads</key>

<true/>

</dict>

</plist>