目前iOS已经不支持http协议了，不过可以通过info.plist设置允许
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.
iOS App 不支持http协议 App Transport Security has blocked a cleartext HTTP (http://)
原文：http://www.cnblogs.com/springday/p/5597517.html