【iOS】Signing for requires a development team. Select a development team in the project editor. Code
报错信息：Signing for "demo1_greating" requires a development team. Select a development team in the project editor.
Code signing is required for product type 'Application' in SDK 'iOS 10.0'
解决方法：单击工程名 -》Signing -》 Team -》 选择对应的Account（如果没有Account，需要主动创建一个）
主动添加Account的方法请参考http://www.liuchuo.net/archives/284