Application Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app‘s Info.plist file.
貌似Xcode7禁用了明码的HTTP请求，应该在info.plist里添加什么字段，解决办法
编辑 info.plist，加入如下设置：
<plist>
<dict>
....
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>
</dict>
</plist>
找不到可以看图：红色标注，在info.plist文件添加
