当我尝试安装菜单包以生成Laravel 4的导航栏时，我收到此错误。我按照其GitHub页面上给出的安装说明进行操作。根据说明，我将"vespakoen/menu"："dev-master"行添加到我的composer.json文件中，并在Windows PowerShell上给出了一个composer update
PS d:xxxyyy> composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Conclusion: remove laravel/framework 4.0.x-dev
- Conclusion: don't install laravel/framework 4.0.x-dev
- Conclusion: don't install laravel/framework v4.0.10
- Conclusion: don't install laravel/framework v4.0.9
- Conclusion: don't install laravel/framework v4.0.8
- Conclusion: don't install laravel/framework v4.0.7
- Conclusion: don't install laravel/framework v4.0.6
- Conclusion: don't install laravel/framework v4.0.5
- Conclusion: don't install laravel/framework v4.0.4
- Conclusion: don't install laravel/framework v4.0.3
- Conclusion: don't install laravel/framework v4.0.2
- Conclusion: don't install laravel/framework v4.0.1
- Conclusion: don't install laravel/framework v4.0.0
- Installation request for vespakoen/menu dev-master -> satisfiable by vespakoen/menu[dev-master].
- Conclusion: don't install laravel/framework v4.0.0-BETA4
- Conclusion: don't install laravel/framework v4.0.0-BETA3
- vespakoen/menu dev-master requires orchestra/testbench 2.1.* -> satisfiable by orchestra/testbench[2.1.x-dev, v2.1
.0].
- orchestra/testbench 2.1.x-dev requires laravel/framework 4.1.* -> satisfiable by laravel/framework[4.1.x-dev, v4.1
.0, v4.1.1, v4.1.10, v4.1.11, v4.1.2, v4.1.3, v4.1.4, v4.1.5, v4.1.6, v4.1.7, v4.1.8, v4.1.9].
- orchestra/testbench v2.1.0 requires laravel/framework 4.1.* -> satisfiable by laravel/framework[4.1.x-dev, v4.1.0,
v4.1.1, v4.1.10, v4.1.11, v4.1.2, v4.1.3, v4.1.4, v4.1.5, v4.1.6, v4.1.7, v4.1.8, v4.1.9].
- Can only install one of: laravel/framework[v4.0.0-BETA2, 4.1.x-dev].
- Can only install one of: laravel/framework[v4.1.0, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.1, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.10, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.11, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.2, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.3, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.4, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.5, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.6, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.7, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.8, v4.0.0-BETA2].
- Can only install one of: laravel/framework[v4.1.9, v4.0.0-BETA2].
- Installation request for laravel/framework 4.0.* -> satisfiable by laravel/framework[4.0.x-dev, v4.0.0, v4.0.0-BET
A2, v4.0.0-BETA3, v4.0.0-BETA4, v4.0.1, v4.0.10, v4.0.2, v4.0.3, v4.0.4, v4.0.5, v4.0.6, v4.0.7, v4.0.8, v4.0.9].
我的Laravel框架安装是"laravel/framework"："4.0.*"
我相信它需要 laravel 4.1 才能工作，请检查您的 composer.json 您需要指定"laravel/framework"："4.*"这将允许将您的 laravel 安装更新到 4.x 版本。请注意，这不是生产现场的首选（如果您将其应用于生产现场）。