小编ski*_*p87的帖子

我在使用git命令时遇到麻烦。我正在-bash: git: command not found。当我运行时$ gem list，它被报告为已安装，并且您已经在.profile下面看到了它的路径。我只是不明白为什么它不起作用。谢谢您的帮助

# MacPorts Installer addition on 2012-10-11_at_19:01:44: adding an appropriate PATH variable for use with MacPorts.
export PATH=/opt/local/bin:/opt/local/sbin:$PATH
# Finished adapting your PATH environment variable for use with MacPorts.
export PATH=${PATH}:/usr/local/mysql/bin

[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"

# git path

export PATH=$PATH:/usr/local/git/bin

您好，就像我在标题中所说的那样，我正在尝试在与 UIImage 的最大尺寸相匹配的正方形内绘制完整的 UIImage。我的问题是如何使我的代码工作。我的代码正在裁剪为正方形大小。我是 IO 新手，谁能帮忙。

PS 我需要调用 CGcontext 的哪些方法。

谢谢。

- (UIImage*)imageWithBorderFromImage:(UIImage*)source;
{
    CGSize size = [source size];
    CGFloat width = size.width;
    CGFloat height = size.height;
    CGSize resizedImageSize;
    if (width < height) {
        resizedImageSize = CGSizeMake(height, height);
    }else {
        resizedImageSize = CGSizeMake(width, width);
    }
    UIGraphicsBeginImageContext(resizedImageSize);
    CGRect rect = CGRectMake(0, 0, resizedImageSize.width, resizedImageSize.height);
    [source drawInRect:rect blendMode:kCGBlendModeNormal alpha:1.0];

    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetRGBStrokeColor(context, 1.0, 0.5, 1.0, 1.0);
    CGContextStrokeRect(context, rect);
    UIImage *testImg =  UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return testImg;
}

我正在寻找的结果类型。

我想知道是否有替代应用"stroke-dasharray"路径.我要做的是在路径中的某个范围添加一条虚线.事情是这条线不直.我想避免使用不同范围内的相同数据创建两行.有没有人有想法？

我大约3个月前开始在铁轨上学习红宝石.我已经关注了关于twitter克隆的几个教程,我正在完成micheal hartl的Ruby on rails教程,我想知道如何确保推动下一个级别.我的目标是能够制作出能够达到实际网络标准的优秀应用.有很多内容可以为初学者学习rails,但我想获得博客,教程,书籍或任何其他链接,以便那些想要推动框架前进的知识.谢谢 .

我认为每个人的答案都对这个问题很重要,所以我不会验证任何答案.尊重每个人.但非常感谢并继续添加答案和反馈.

你可以帮我解决以下问题吗？我知道这是基本的,但我似乎缺少一些非常基本的东西.当我问SectionEdit.new时,事情似乎出错,虽然我指的是正确的类名.谢谢你的帮助.

这是我得到的错误.

$ edit = SectionEdit.new
NameError: undefined local variable or method `class_name' for #<Class:0x103675008>
    from /Library/Ruby/Gems/1.8/gems/activerecord-3.2.8/lib/active_record/dynamic_matchers.rb:50:in `method_missing'
    from /Users/seydoukonate/Sites/simple_cms/app/models/section_edit.rb:3
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:469:in `load'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:469:in `load_file'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:639:in `new_constants_in'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:468:in `load_file'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:353:in `require_or_load'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:502:in `load_missing_constant'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:192:in `const_missing'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:190:in `each'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:190:in `const_missing'
    from (irb):14

我已经将模型"页面"定义如下

class SectionEdit < ActiveRecord::Base
  attr_accessible :admin_user_id, :section_id, :summary
  belongs_to :editor, class_name => "AdminUser", :foreign_key => 'admin_user_id'
  belongs_to :section
end

管理员用户

class AdminUser < ActiveRecord::Base
   attr_accessible :first_name, :last_name, :email, :username

  has_and_belongs_to_many …