IOS开发系列（6）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.

在学习网络处理的过程，发现代码都没错，运行时却发生以下警告:

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.

问题分析：

应用程序采取了明文HTTP协议（http：/ /）。而在iOS9 中，苹果引入了一项隐私保护功能ATS（App Transport Security），屏蔽http明文传输协议资源加载，因为http明文传输协议不安全，连接必须改成更安全的https协议。目前修改info.plist文件配置，让应用程序暂时关闭ATS，可以继续使用HTTP明文传输。

从苹果的官方消息，苹果有意App Store中的所有应用都必须启用 App Transport Security安全功能。

解决办法：

直接打开info.plist文件，添加key元素

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

具体位置如下

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        ...
    <key>NSAppTransportSecurity</key>
    <dict>
        <key>NSAllowsArbitraryLoads</key>
        <true/>
    </dict>
        ...
</dict>
</plist>

或者在xcode中打开info.plist，添加"NSAppTransportSecurity",类型为“Dictionary” 。再“NSAppTransportSecurity”下添加"NSAllowsArbitraryLoads", 类型为"Boolean"，“Value”为“YES”即可。

IOS开发系列（6）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.