Xcode7 使用NSURLSession发送HTTP请求出错

控制台打印：

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.

在iOS9 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。

解决方法：

在info.plist中添加 NSAppTransportSecurityNSAllowsArbitraryLoads

官方文档：

https://developer.apple.com/library/prerelease/ios/releasenotes/General/WhatsNewIniOS/Articles/iOS9.html#//apple_ref/doc/uid/TP40016198-DontLinkElementID_13