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.
在iOS9 beta1中,苹果将原http协议改成了https协议,使用 TLS1.2 SSL加密请求数据。
解决办法:在info.plist中添加
NSAppTransportSecurity
NSAllowsArbitraryLoads