xcode提示App Transport Security ha

Xcode7发送HTTP请求失败提示下面的信息：

App 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.

原因是因为安全问题，ATS禁止了HTTP的明文传输。可以修改Info.plist文件，让它临时允许明文传输。

可以Source Code方式打开info.plist加上下面一段配置

<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>

也可以在属性列表界面添加配置