3月一次偶然也是必然的機會，促使自己有想法學習flutter，下面就遇到的一些問題進行記錄。

一、安裝flutter遇到的問題：

1、Mac終端輸入命令總是出現command not found！

解決：https://blog.csdn.net/fuyundage/article/details/79516286

2、Mac安裝Python3報錯：
Permission denied @ dir_s_mkdir - /usr/local/Frameworks

Warning: python 3.7.2_1 is already installed, it's just not linked.
You can use brew link python to link this version.

解決：http://www.lxweimin.com/p/965fd0be3f0c

二、運行flutter項目報錯：

Launching lib/main.dart on Android SDK built for x86 in debug mode...
Initializing gradle...
Resolving dependencies...

• Error running Gradle:
  ProcessException: Process "/Users/rabbit/develop/android/flutter_app/android/gradlew" exited abnormally:
  Project evaluation failed including an error in afterEvaluate {}. Run with --stacktrace for details of the afterEvaluate {} error.

FAILURE: Build failed with an exception.

• Where:
  Build file '/Users/rabbit/develop/android/flutter_app/android/app/build.gradle' line: 25

• What went wrong:
  A problem occurred evaluating project ':app'.

Could not resolve all files for configuration 'classpath'.
Could not find lint-gradle-api.jar (com.android.tools.lint:lint-gradle-api:26.1.2).
Searched in the following locations:
https://jcenter.bintray.com/com/android/tools/lint/lint-gradle-api/26.1.2/lint-gradle-api-26.1.2.jar

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 0s
Command: /Users/rabbit/develop/android/flutter_app/android/gradlew app:properties

Finished with error: Please review your Gradle project setup in the android/ folder.

參考解決方案：

1. 修改源
2. 翻墻--下載了PeerVPN
3. 修改項目的/android/app/build.gradle文件中的sdk版本號為28 (運行成功后，我改回27正常運行，估計更多的是墻原因吧，版本號不礙事)

三、Android Studio找不到iPhone真機

iPhone模擬器：
終端輸入：flutter doctor命令
可以發現，設備選擇中能找到iPhone模擬器
真機：發現沒有可選的真機可用
參考解決：http://www.lxweimin.com/p/69e1efc2fc55