resolve the installation issue
Using flutter doctor to check:
~ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.12.13+hotfix.9, on Mac OS X 10.15.4 19E287, locale zh-Hans-CN)
[!] Android toolchain - develop for Android devices
✗ Unable to locate Android SDK.
Install Android Studio from: https://developer.android.com/studio/index.html
On first launch it will assist you in installing the Android SDK components.
(or visit https://flutter.dev/setup/#android-setup for detailed instructions).
If the Android SDK has been installed to a custom location, set ANDROID_HOME to that location.
You may also want to add it to your PATH environment variable.
✗ No valid Android SDK platforms found in /usr/local/Caskroom/android-platform-tools/29.0.2/platforms. Directory was empty.
[!] Xcode - develop for iOS and macOS (Xcode 11.4.1)
✗ CocoaPods not installed.
CocoaPods is used to retrieve the iOS and macOS platform side's plugin code that responds to your plugin usage on the Dart side.
Without CocoaPods, plugins will not work on iOS or macOS.
For more info, see https://flutter.dev/platform-plugins
To install:
sudo gem install cocoapods
[!] Android Studio (not installed)
[!] Connected device
! No devices available
! Doctor found issues in 4 categories.
It looks we have to install CocoaPods:
~ sudo gem install cocoapods
Password:
ERROR: Loading command: install (LoadError)
dlopen(/usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/x86_64-darwin17/openssl.bundle, 9): Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib
Referenced from: /usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/x86_64-darwin17/openssl.bundle
Reason: image not found - /usr/local/Cellar/ruby/2.5.1/lib/ruby/2.5.0/x86_64-darwin17/openssl.bundle
ERROR: While executing gem ... (NoMethodError)
undefined method `invoke_with_build_args' for nil:NilClass
``
The reason is that the openssl version is already 1.1, while `gem install`
needs the openssl version 1.0:
~ brew info openssl openssl@1.1: stable 1.1.1f (bottled) [keg-only] Cryptography and SSL/TLS Toolkit https://openssl.org/ /usr/local/Cellar/openssl@1.1/1.1.1d (7,983 files, 17.9MB) Poured from bottle on 2020-03-15 at 18:48:17 From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/openssl@1.1.rb ==> Caveats A CA file has been bootstrapped using certificates from the system keychain. To add additional certificates, place .pem files in /usr/local/etc/openssl@1.1/certs
and run /usr/local/opt/openssl@1.1/bin/c_rehash
openssl@1.1 is keg-only, which means it was not symlinked into /usr/local, because macOS provides LibreSSL.
==> Analytics install: 793,390 (30 days), 1,631,668 (90 days), 4,466,643 (365 days) install-on-request: 122,631 (30 days), 230,827 (90 days), 625,229 (365 days) build-error: 0 (30 days)
Check the available version installed by brew:
~ ls -al /usr/local/Cellar/openssl* /usr/local/Cellar/openssl: total 0 drwxr-xr-x 7 pandysong staff 224 9 14 2018 . drwxrwxr-x 182 pandysong admin 5824 4 20 23:32 .. drwxr-xr-x 13 pandysong admin 416 9 17 2017 1.0.2l drwxr-xr-x 13 pandysong admin 416 1 6 2018 1.0.2n drwxr-xr-x 13 pandysong admin 416 6 10 2018 1.0.2o_1 drwxr-xr-x 13 pandysong staff 416 8 10 2018 1.0.2o_2 drwxr-xr-x 13 pandysong staff 416 9 14 2018 1.0.2p
/usr/local/Cellar/openssl@1.1: total 0 drwxr-xr-x 3 pandysong staff 96 3 15 19:03 . drwxrwxr-x 182 pandysong admin 5824 4 20 23:32 .. drwxr-xr-x 14 pandysong staff 448 3 15 18:48 1.1.1d
Swich to version 1.0:
~ brew switch openssl 1.0.2p Cleaning /usr/local/Cellar/openssl/1.0.2o_1 Cleaning /usr/local/Cellar/openssl/1.0.2n Cleaning /usr/local/Cellar/openssl/1.0.2p Cleaning /usr/local/Cellar/openssl/1.0.2l Cleaning /usr/local/Cellar/openssl/1.0.2o_2 Opt link created for /usr/local/Cellar/openssl/1.0.2p
Now we could use gem to install CocoaPods:
~ sudo gem install cocoapods Fetching: thread_safe-0.3.6.gem (100%) Successfully installed thread_safe-0.3.6 Fetching: tzinfo-1.2.7.gem (100%) Successfully installed tzinfo-1.2.7 Fetching: activesupport-4.2.11.1.gem (100%) Successfully installed activesupport-4.2.11.1 Fetching: nap-1.1.0.gem (100%) Successfully installed nap-1.1.0 Fetching: fuzzy_match-2.0.4.gem (100%) Successfully installed fuzzy_match-2.0.4 Fetching: httpclient-2.8.3.gem (100%) Successfully installed httpclient-2.8.3 Fetching: algoliasearch-1.27.1.gem (100%) Successfully installed algoliasearch-1.27.1 Fetching: ethon-0.12.0.gem (100%) Successfully installed ethon-0.12.0 Fetching: typhoeus-1.3.1.gem (100%) Successfully installed typhoeus-1.3.1 Fetching: netrc-0.11.0.gem (100%) Successfully installed netrc-0.11.0 Fetching: cocoapods-core-1.9.1.gem (100%) Successfully installed cocoapods-core-1.9.1 Fetching: claide-1.0.3.gem (100%) Successfully installed claide-1.0.3 Fetching: cocoapods-deintegrate-1.0.4.gem (100%) Successfully installed cocoapods-deintegrate-1.0.4 Fetching: cocoapods-downloader-1.3.0.gem (100%) Successfully installed cocoapods-downloader-1.3.0 Fetching: cocoapods-plugins-1.0.0.gem (100%) Successfully installed cocoapods-plugins-1.0.0 Fetching: cocoapods-search-1.0.0.gem (100%) Successfully installed cocoapods-search-1.0.0 Fetching: cocoapods-stats-1.1.0.gem (100%) Successfully installed cocoapods-stats-1.1.0 Fetching: cocoapods-trunk-1.4.1.gem (100%) Successfully installed cocoapods-trunk-1.4.1 Fetching: cocoapods-try-1.2.0.gem (100%) Successfully installed cocoapods-try-1.2.0 Fetching: molinillo-0.6.6.gem (100%) Successfully installed molinillo-0.6.6 Fetching: atomos-0.1.3.gem (100%) Successfully installed atomos-0.1.3 Fetching: CFPropertyList-3.0.2.gem (100%) Successfully installed CFPropertyList-3.0.2 Fetching: colored2-3.1.2.gem (100%) Successfully installed colored2-3.1.2 Fetching: nanaimo-0.2.6.gem (100%) Successfully installed nanaimo-0.2.6 Fetching: xcodeproj-1.16.0.gem (100%) Successfully installed xcodeproj-1.16.0 Fetching: escape-0.0.4.gem (100%) Successfully installed escape-0.0.4 Fetching: fourflusher-2.3.1.gem (100%) Successfully installed fourflusher-2.3.1 Fetching: gh_inspector-1.1.3.gem (100%) Successfully installed gh_inspector-1.1.3 Fetching: ruby-macho-1.4.0.gem (100%) Successfully installed ruby-macho-1.4.0 Fetching: cocoapods-1.9.1.gem (100%) Successfully installed cocoapods-1.9.1 Parsing documentation for thread_safe-0.3.6 Installing ri documentation for thread_safe-0.3.6 Parsing documentation for tzinfo-1.2.7 Installing ri documentation for tzinfo-1.2.7 Parsing documentation for activesupport-4.2.11.1 Installing ri documentation for activesupport-4.2.11.1 Parsing documentation for nap-1.1.0 Installing ri documentation for nap-1.1.0 Parsing documentation for fuzzy_match-2.0.4 Installing ri documentation for fuzzy_match-2.0.4 Parsing documentation for httpclient-2.8.3 Installing ri documentation for httpclient-2.8.3 Parsing documentation for algoliasearch-1.27.1 Installing ri documentation for algoliasearch-1.27.1 Parsing documentation for ethon-0.12.0 Installing ri documentation for ethon-0.12.0 Parsing documentation for typhoeus-1.3.1 Installing ri documentation for typhoeus-1.3.1 Parsing documentation for netrc-0.11.0 Installing ri documentation for netrc-0.11.0 Parsing documentation for cocoapods-core-1.9.1 Installing ri documentation for cocoapods-core-1.9.1 Parsing documentation for claide-1.0.3 Installing ri documentation for claide-1.0.3 Parsing documentation for cocoapods-deintegrate-1.0.4 Installing ri documentation for cocoapods-deintegrate-1.0.4 Parsing documentation for cocoapods-downloader-1.3.0 Installing ri documentation for cocoapods-downloader-1.3.0 Parsing documentation for cocoapods-plugins-1.0.0 Installing ri documentation for cocoapods-plugins-1.0.0 Parsing documentation for cocoapods-search-1.0.0 Installing ri documentation for cocoapods-search-1.0.0 Parsing documentation for cocoapods-stats-1.1.0 Installing ri documentation for cocoapods-stats-1.1.0 Parsing documentation for cocoapods-trunk-1.4.1 Installing ri documentation for cocoapods-trunk-1.4.1 Parsing documentation for cocoapods-try-1.2.0 Installing ri documentation for cocoapods-try-1.2.0 Parsing documentation for molinillo-0.6.6 Installing ri documentation for molinillo-0.6.6 Parsing documentation for atomos-0.1.3 Installing ri documentation for atomos-0.1.3 Parsing documentation for CFPropertyList-3.0.2 Installing ri documentation for CFPropertyList-3.0.2 Parsing documentation for colored2-3.1.2 Installing ri documentation for colored2-3.1.2 Parsing documentation for nanaimo-0.2.6 Installing ri documentation for nanaimo-0.2.6 Parsing documentation for xcodeproj-1.16.0 Installing ri documentation for xcodeproj-1.16.0 Parsing documentation for escape-0.0.4 Installing ri documentation for escape-0.0.4 Parsing documentation for fourflusher-2.3.1 Installing ri documentation for fourflusher-2.3.1 Parsing documentation for gh_inspector-1.1.3 Installing ri documentation for gh_inspector-1.1.3 Parsing documentation for ruby-macho-1.4.0 Installing ri documentation for ruby-macho-1.4.0 Parsing documentation for cocoapods-1.9.1 Installing ri documentation for cocoapods-1.9.1 Done installing documentation for thread_safe, tzinfo, activesupport, nap, fuzzy_match, httpclient, algoliasearch, ethon, typhoeus, netrc, cocoapods-core, claide, cocoapods-deintegrate, cocoapods-downloader, cocoapods-plugins, cocoapods-search, cocoapods-stats, cocoapods-trunk, cocoapods-try, molinillo, atomos, CFPropertyList, colored2, nanaimo, xcodeproj, escape, fourflusher, gh_inspector, ruby-macho, cocoapods after 32 seconds 30 gems installed