在运行 flutter doctor 查应用环境时报错；
✗ libimobiledevice and ideviceinstaller are not installed. To install with Brew, run:
brew update
brew install --HEAD usbmuxd
brew link usbmuxd
brew install --HEAD libimobiledevice
brew install ideviceinstaller
尝试 brew update，但是 即使安装了这几个库依然报这个错误，经过一番尝试，解决问题：
要先把这几个库卸载掉然后重新安装一下；
brew update brew uninstall --ignore-dependencies libimobiledevice brew uninstall --ignore-dependencies usbmuxd brew install --HEAD usbmuxd brew install --HEAD libimobiledevice
modify
modify1