Xcode开发技巧与苹果文档

0.官方开发文档
https://developer.apple.com/library/archive/navigation/

1.移动一个工程后，打开工程文件夹里的文件是乱序的。
选中要整理的文件夹右键，点一下“Sort by Name”或者“Sort by Type”即可排序
2.Undefined symbols for architecture armv7:
从product 选择 该目录：~/Library/Developer/Xcode/DerivedData 关掉xcode，删掉DerivedData这个文件夹里的全部东西 然后重新打开项目clean>build
3.查看目前各个系统设备分配比例
https://developer.apple.com/support/app-store/

4.下载其他版本的Xcode
https://developer.apple.com/download/more/

5.Appstore上传卡住 没有动静
查看 开发者后台和上传后台有没有协议要打钩
就是苹果网络的问题。

6.安装多个xcode导致pod异常

[!] Unable to add a source with url `https://github.com/CocoaPods/Specs.git` named `master-1`.
You can try adding it manually in `~/.cocoapods/repos` or via `pod repo add`.

sudo xcode-select --switch /Applications/Xcode.app

https://developer.apple.com/documentation/uikit/uitextview/1618619-textcontainerinset