Cocoapods對 Swift 的支持不是很好，每次 Xcode 或 Cocoapods 版本更新，總有一些意外發(fā)生，這里總結(jié)下這一年半以來遇到的各種錯誤及其解決辦法，省的下次遇到又要Google一遍。

安裝淘寶 Ruby源的問題 Error fetching http://ruby.taobao.org/

由于墻的原因，安裝 Cocoapods 時(shí)有可能執(zhí)行完install命令半天都沒反應(yīng)，這時(shí)就需要將 Ruby 的默認(rèn)源 https://rubygems.org/ 替換成淘寶的源，但會遇到以下錯誤：

$ gem sources -a http://ruby.taobao.org/
$ Error fetching http://ruby.taobao.org/:
  bad response Not Found 404 (http://ruby.taobao.org/specs.4.8.gz)

這是因?yàn)?，淘寶把源?http 換成 https 了，而網(wǎng)上大多數(shù)教程是舊的，沒有更新，正確的是：

$ gem sources -a https://ruby.taobao.org/

Pod Error in Xcode “Id: framework not found Pods”

執(zhí)行完 pod install 后，打開 workspace 文件，編譯，遇到以下錯誤：

Id: framework not found Pods clang: error: linker command failed with exit code 1 (use -v to see invocation)

stackoverflow解決方法的：http://stackoverflow.com/questions/31139534/pod-error-in-xcode-id-framework-not-found-pods

步驟如下：

• 打開 workspace
• 點(diǎn)擊 Xcode 左邊的藍(lán)色項(xiàng)目圖標(biāo)
• 在右邊選擇對應(yīng)的 Target
• 單擊 Genral 的 tab
• 找到 Linked Frameworks and Libraries 的分組
• 刪除 Pods frameworks（或 刪除Embedded Binaries下的Pod.framework）
• 關(guān)閉 Xcode，運(yùn)行 pod update，
• Clean，然后重新 Run/Build

提交App到Itunes Connect時(shí)報(bào)錯 ERROR ITMS-90635

提交 App 到 ITunes Connect 審核時(shí)報(bào)以下錯誤：

ERROR ITMS-90635: "Invalid Mach-O Format. The Mach-O in bundle "XXXX!.app/Frameworks/BRYXBanner.framework" isn’t consistent with the Mach-O in the main bundle. The main bundle Mach-O contains armv7(machine code) and arm64(machine code), while the nested bundle Mach-O contains armv7(bitcode) and arm64(bitcode). Verify that all of the targets for a platform have a consistent value for the ENABLE_BITCODE build setting." 
WARNING ITMS-90080: "The executable 'Payload/XXXX!.app/Frameworks/Bolts.framework' is not a Position Independent Executable. Please ensure that your build settings are configured to create PIE executables. For more information refer to Technical Q&A QA1788 - Building a Position Independent Executable in the iOS Developer Library."

stackoverflow 解決方法：http://stackoverflow.com/questions/37634627/upload-to-itunesconnect-failing

這是因?yàn)?Xcode 7 (或以上）默認(rèn)支持 bitcode，而你的項(xiàng)目關(guān)閉了bitcode（即在 【Build Settings】 中設(shè)置了 【Enable Bitcode】為 NO），需要在 Podfile中進(jìn)行額外配置：

post_install do |installer| 
  installer.pods_project.targets.each do |target| 
    target.build_configurations.each do |config| 
      config.build_settings['ENABLE_BITCODE'] = 'NO' 
    end 
  end 
end

升級Xcode8后報(bào)錯“target overrides the EMBEDDED_CONTENT_CONTAINS_SWIFTbuild setting”

升級 Xcode 8后，運(yùn)行 Pod install， 報(bào)以下錯誤：

[!] The X target overrides the `EMBEDDED_CONTENT_CONTAINS_SWIFT` build setting defined in `X’. This can lead to problems with the CocoaPods installation
- Use the `$(inherited)` flag, or
- Remove the build settings from the target.

[!] The `X` target overrides the `ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES` build setting defined in `X'. This can lead to problems with the CocoaPods installation
- Use the `$(inherited)` flag, or
- Remove the build settings from the target.

stackoverflow 解決方法：http://stackoverflow.com/questions/39569743/errors-after-updating-to-xcode-8-no-such-module-and-target-overrides-the-em

步驟如下：

• 找到 【Project/Targets】-->【Project Name】-->【Build Settings】
• 搜索 "ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES"
• 右鍵 "debug"，選擇 "other"，輸入 $(inherited)
• "release" 也做同樣的操作，然后重新 "pod install"

如下圖：

指定編譯版本

指定Target的 Swift 編譯版本為 3.0

post_install do |installer|
    installer.pods_project.targets.each do |target|
        target.build_configurations.each do |configuration|
            configuration.build_settings['SWIFT_VERSION'] = "3.0"
        end
    end
end

但如果是 Objective-C 跟 Swift 混編的項(xiàng)目, 想要引入 OC 的第三方庫的話, 還需要添加另一項(xiàng)參數(shù)

configuration.build_settings['ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES'] = 'NO'