Mac 上使用QT 出错:Project ERROR: Xcode not set up properly.

创建项目编译的时候，会报错
Qt Creator - Project ERROR: Xcode not set up properly. You may need to confirm the license agreement by running /usr/bin/xcodebuild

首先确认安装了CommandLineTools，
在shell中输入
xcode-select --install
确认安装了CommandLineTools

然后
sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer
但是在我电脑上并没有什么用，还是错误

打开文件：
Qt_install_folder/5.7/clang_64/mkspecs/features/mac/default_pre.prf
找到这行:
isEmpty($$list($$system("/usr/bin/xcrun -find xcrun 2>/dev/null")))
替换为:
isEmpty($$list($$system("/usr/bin/xcrun -find xcodebuild 2>/dev/null")))

Before Xcode 8, this problem occurs when command line tools are installed after Xcode is installed. What happens is the Xcode-select developer directory gets pointed to /Library/Developer/CommandLineTools.

Point Xcode-select to the correct Xcode Developer directory with the command:

sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer
Confirm the license agreement with the command:

xcodebuild -license
This will prompt you to read through the license agreement.

Enter agree to accept the terms.