Ruby-on-rails 使用 Paperclip 调整图像大小
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Resize an image with Paperclip
提问by Yuval Karmi
The Paperclip plugin for Rails has a resize option that keeps the image in proportion. According to Ryan Bates' Paperclip Railscast, to make sure that option is on, you have to add a greater-than sign in the end of the size for the style you're looking to resize, as such:
Rails 的 Paperclip 插件有一个调整大小的选项，可以保持图像的比例。根据 Ryan Bates 的Paperclip Railscast，要确保该选项处于启用状态，您必须在要调整大小的样式的大小末尾添加一个大于号，如下所示：
:styles => { :small => "160x160>" }
I'm looking for Paperclip to resize my image to an exact size, even if that means it being out of proportion, so I figured that removing the greater-than sign would do the trick, as such:
我正在寻找 Paperclip 将我的图像调整为精确大小，即使这意味着它不成比例，所以我认为删除大于号可以解决问题，因此：
:styles => { :small => "160x160" }
Well, turns out nothing happens. So the greater-than sign is redundant in the first place. I'm still left with the following question, though:
好吧，事实证明什么也没发生。所以大于号首先是多余的。不过，我仍然有以下问题：
How would I force the image into a set size, ignoring proportions?
我如何将图像强制为设定大小，而忽略比例？
Thanks!
谢谢！
回答by Austin Fitzpatrick
You can use "160x160#" which will scale and crop to exactly that size, which is unique to paperclip. Otherwise you can use any of the ImageMagick geometry strings, detailed here:
您可以使用“160x160#”，它将缩放和裁剪到恰好那个大小，这是回形针独有的。否则，您可以使用任何 ImageMagick 几何字符串，详情如下：
But I'll quote the one you're interested in:
但我会引用你感兴趣的一个：
"160x160!"
Width and height emphatically given, original aspect ratio ignored.
着重给出宽度和高度，忽略原始纵横比。
