info.plistに下記を記載
<key>NSAppTransportSecurity</key> <dict> <key>NSExceptionDomains</key> <dict> <key>example.com</key> <dict> <!--Include to allow subdomains--> <key>NSIncludesSubdomains</key> <true/> <!--Include to allow HTTP requests--> <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key> <true/> <!--Include to specify minimum TLS version--> <key>NSTemporaryExceptionMinimumTLSVersion</key> <string>TLSv1.1</string> </dict> </dict> </dict>
lazy option(笑)
<key>NSAppTransportSecurity</key> <dict> <!--Include to allow all connections (DANGER)--> <key>NSAllowsArbitraryLoads</key> <true/> </dict>
参考
Transport security has blocked a cleartext HTTP