目錄

• 出現(xiàn)場景
• 解決辦法

出現(xiàn)場景

朋友的一個老項目，創(chuàng)建的時候用的是flutter 1.0版本。
現(xiàn)在讓我?guī)兔Ω膫€東西，我的Flutter是2.0，導(dǎo)入項目后，在ios上編譯時出現(xiàn)以下錯誤

Upgrading contents.xcworkspacedata Running pod install... CocoaPods' output: ?[!] Invalid `Podfile` file: no implicit conversion of nil into String.# from /Users/ado/my/work/flutter/testdemo4/ios/Podfile:58# -------------------------------------------# unless File.exist?(copied_framework_path)> FileUtils.cp_r(File.join(cached_framework_dir, 'Flutter.framework'), copied_flutter_dir)# end# -------------------------------------------/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.1/lib/cocoapods-core/podfile.rb:318:in `rescue in block in from_ruby'/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.1/lib/cocoapods-core/podfile.rb:312:in `block in from_ruby'/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.1/lib/cocoapods-core/podfile.rb:50:in `instance_eval'/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.1/lib/cocoapods-core/podfile.rb:50:in `initialize'/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.1/lib/cocoapods-core/podfile.rb:310:in `new'/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.1/lib/cocoapods-core/podfile.rb:310:in `from_ruby'/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.1/lib/cocoapods-core/podfile.rb:276:in `from_file'/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.1/lib/cocoapods/config.rb:205:in `podfile'/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.1/lib/cocoapods/command.rb:160:in `verify_podfile_exists!'/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.1/lib/cocoapods/command/install.rb:46:in `run'/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.1/lib/cocoapods/command.rb:52:in `run'/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.1/bin/pod:55:in `<top (required)>'/usr/local/bin/pod:23:in `load'/usr/local/bin/pod:23:in `<main>'Error running pod install Error launching application on iPhone 12 Pro Max.

解決辦法

根據(jù)錯誤提示，提示Podfile是無效文件，是Podfile中的內(nèi)容造成的錯誤。
因為Podfile是在flutter 1.0的環(huán)境下運行生成的，估計是flutter1.0和2.0有一些配置上的不一樣，所以我們先刪除ios目錄中的Podfile和Podfile.lock，然后再重新運行

flutter run

或者運行

flutter run ios

這樣將會生成flutter 2.0的Podfile，編譯ios就不會報錯了。

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