报错：
=== BUILD TARGET url_launcher OF PROJECT Pods WITH CONFIGURATION Debug ===
/Users/liyan/software/flutter/.pub-cache/hosted/pub.flutter-io.cn/simple_permissions-0.1.9/ios/Classes/SimplePermissionsPlugin.m:2:9: fatal error: 'simple_permissions/simple_permissions-Swift.h' file not found
#import <simple_permissions/simple_permissions-Swift.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
解决方法：
进入flutter_project/ios/,编辑Podfile，将
# platform :ios, '9.0'
替换为：
platform :ios, '10.0'
use_frameworks!
关键是use_frameworks!