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Command /usr/bin/codesign failed with exit code 1
unable to build chain to self-signed root for signer "iPhone De
https://www.digicert.com/ssl-support/pem-ssl-creation.htm


Creating a .pem with the Private Key and Entire Trust Chain

Log into your DigiCert Management Console and download your Intermediate (DigiCertCA.crt) and Primary Certificates (your_domain_name.crt).
Open a text editor (such as wordpad) and paste the entire body of each certificate into one text file in the following order:

The Private Key - your_domain_name.key
The Primary Certificate - your_domain_name.crt
The Intermediate Certificate - DigiCertCA.crt
The Root Certificate - TrustedRoot.crt
Make sure to include the beginning and end tags on each certificate. The result should look like this:

-----BEGIN RSA PRIVATE KEY-----
(Your Private Key: your_domain_name.key)
-----END RSA PRIVATE KEY-----
-----BEGIN CERTIFICATE-----
(Your Primary SSL certificate: your_domain_name.crt)
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
(Your Intermediate certificate: DigiCertCA.crt)
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
(Your Root certificate: TrustedRoot.crt)
-----END CERTIFICATE-----

Save the combined file as your_domain_name.pem. The .pem file is now ready to use.



How to Install a Digital Certificate on an iPhone or iPad
https://www.geekgyaan.com/how-to-install-a-digital-certificate-on-an-iphone-or-ipad/

https://blog.csdn.net/g510941365/article/details/56682720
ios 配置HTTPS （单向验证，工程不需要加证书）

https://blog.csdn.net/super_haifeng/article/details/53464802
iOS开发 支持https请求以及ssl证书配置


https://developer.apple.com/swift/resources/
https://developer.apple.com/documentation
https://developer.apple.com/documentation/uikit

https://developer.apple.com/library/content/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40007072
https://developer.apple.com/documentation/uikit/uitabbarcontroller

https://developer.apple.com/library/content/referencelibrary/GettingStarted/DevelopiOSAppsSwift/Resources.html
https://developer.apple.com/library/content/documentation/WindowsViews/Conceptual/ViewControllerCatalog/Chapters/TabBarControllers.html
https://www.weheartswift.com/learn-swift/
http://www.cocoachina.com/special/fornew.html

https://www.bmob.cn/weixin   10分钟即刻打造企业微信小程序

http://study.163.com/category/ios#/?pt=0
http://www.jikexueyuan.com/course/ios/
http://www.maiziedu.com
https://github.com/manofit/swift_project  Swift 4完整demo来袭  
入门demo，简单易懂，功能完善，是小白入门的好样例。封装了网络请求库，自定义了控件。
http://www.cocoachina.com/bbs/read.php?tid-1735418.html

http://www.swiftv.cn/course/j2vo9o40
微信头条App全栈实,后续课程，请到xiaoboswift.com观看

http://www.cnblogs.com/wuxian/p/4394094.html