Xcode-找不到“Firebase”的规范`

当我试图在Xcode 7.3.1项目中用我的

pod文件安装
pod
时。
I获取错误消息（终端）

我的pod文件是：

# Uncomment this line to define a global platform for your project
# platform :ios, '9.0'
use_frameworks!

target 'UserLogin' do

    pod ‘Firebase’
    pod ‘Firebase/Auth’

end

当我尝试安装pod时——冗长

Inspecting targets to integrate
  Using `ARCHS` setting to build architectures of target `Pods-UserLogin`: (``)

Resolving dependencies of `Podfile`
[!] Unable to find a specification for `Firebase`

/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:442:in `handle_resolver_error'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:65:in `rescue in resolve'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:57:in `resolve'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:563:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/user_interface.rb:63:in `section'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:561:in `resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:76:in `analyze'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:227:in `analyze'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:151:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/user_interface.rb:63:in `section'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:150:in `resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:114:in `install!'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/command/install.rb:37:in `run'
/Library/Ruby/Gems/2.0.0/gems/claide-1.0.0/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/command.rb:50:in `run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'

检查要集成的目标
使用'ARCHS'设置构建目标'Pods UserLogin'的体系结构：（``）
解析“Podfile”的依赖项`
[！]找不到“Firebase”的规范`
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:442:in'handle\u resolver\u error'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:65:in“rescue in resolve”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:57:in'resolve'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:563:in'block in resolve_dependencies'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/user_interface.rb:63:in“section”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:561:in'resolve_dependencies'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:76:in'analyze'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:227:in'analyze'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:151:在“解析依赖项中的块”中
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/user_interface.rb:63:in“section”
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:150:在“解析依赖项”中
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:114:in'install！'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/command/install.rb:37:in'run'
/Library/Ruby/Gems/2.0.0/Gems/claide-1.0.0/lib/claide/command.rb:334:in'run'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/lib/cocoapods/command.rb:50:in'run'
/Library/Ruby/Gems/2.0.0/Gems/cocoapods-1.0.1/bin/pod:55:in`'
/usr/local/bin/pod:23:in“装载”
/usr/local/bin/pod:23:in`'

我尝试了很多方法，但“pod安装”仍然不起作用。我没有两个文件
Podfile.lock
和
.xcworkspace

有人有类似的问题吗？
试着用
“
替换引号
”
“

”。尝试运行

pod repo update

同样在我的案例中，问题在于pod repo。我通过这样做修正了：

Inspecting targets to integrate
  Using `ARCHS` setting to build architectures of target `Pods-UserLogin`: (``)

Resolving dependencies of `Podfile`
[!] Unable to find a specification for `Firebase`

/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:442:in `handle_resolver_error'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:65:in `rescue in resolve'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/resolver.rb:57:in `resolve'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:563:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/user_interface.rb:63:in `section'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:561:in `resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer/analyzer.rb:76:in `analyze'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:227:in `analyze'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:151:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/user_interface.rb:63:in `section'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:150:in `resolve_dependencies'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/installer.rb:114:in `install!'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/command/install.rb:37:in `run'
/Library/Ruby/Gems/2.0.0/gems/claide-1.0.0/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/lib/cocoapods/command.rb:50:in `run'
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.0.1/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'