Xcode内置片段编辑 [英] Xcode built-in snippets edit

问题描述

是否可以编辑Xcode的内置代码段？有一个编辑按钮，但是按一下它似乎不允许更改摘录的文本。

Is there a way to edit Xcode's built-in snippets? There is an edit button, but pressing it doesn't seem to allow changing the snippet's text.

任何见解都会受到赞赏。

Any insight is appreciated.

推荐答案

您仍然无法编辑内置系统代码段。但是，您可以编辑用户代码段。

You still can't edit the built-in system snippets. You can, however, edit "user" snippets.

在我看来，最简单的解决方案是创建所有默认代码段的副本，但对其进行修改，使其成为用户代码段并覆盖默认版本。我写了一些Python脚本来完成这项工作。这非常简单，运行完所有Xcode的代码段后，即可通过Xcode GUI进行神奇的编辑。无需手动在plist中进行修改：

The simplest solution in my mind was to create copies of all the default snippets, but modify them so that they are "user" snippets and override the default versions. I wrote a little Python script to do the job. It's very simple, and after running it all of Xcode's snippets will be magically editable via the Xcode GUI. No need to go mucking around in the plist by hand:

import plistlib
import os.path

# Create user snippet directory if needed.
user_snippet_path = os.path.expanduser("~/Library/Developer/Xcode/UserData/CodeSnippets")
try: 
    os.makedirs(user_snippet_path)
except OSError, err:
    if err.errno != errno.EEXIST or not os.path.isdir(user_snippet_path): 
        raise

# Important, you'll need to quit and restart Xcode to notice the effects.
# Important, change this if you're on a Developer Preview of Xcode.
system_snippet_path = "/Applications/Xcode.app/Contents/PlugIns/IDECodeSnippetLibrary.ideplugin/Contents/Resources/SystemCodeSnippets.codesnippets"

print("Reading snippets from " + system_snippet_path)
plist = plistlib.readPlist(system_snippet_path)
for entry in plist:

    # Create a new user snippet file with modified
    # contents of the original snippet. Ignore paths that
    # already contain a user snippet to prevent overwriting
    # previously generated snippets.
    snippet_id = entry["IDECodeSnippetIdentifier"]
    snippet_path = user_snippet_path + "/" + snippet_id + ".codesnippet"
    if os.path.exists(snippet_path):
        print(snippet_path + " already exitsts: Skipping.")
        continue

    print("Writing " + snippet_path)

    # Marks the snippet as a user snippet. Xcode will
    # crash if a user snippet and a system snippet share
    # the same identifier.
    entry["IDECodeSnippetUserSnippet"] = True

    # Given two snippets with the same identifier,
    # Xcode will only show the snippet with the higher
    # "version number". This effectively hides the
    # default version of the snippet.
    entry["IDECodeSnippetVersion"] += 1

    plistlib.writePlist(entry, snippet_path)

print("Done writing snippets.")

您会注意到它实际上并没有更改Xcode的任何内部文件。它只是添加文件，而Xcode足够聪明，可以使用添加的文件而不是原始代码段。您可以随时删除该片段的用户版本，随时回滚到原始文档。您还可以根据需要多次运行脚本，而不必担心会覆盖脚本先前运行所生成的任何用户摘要。

You'll notice that it doesn't actually change any of Xcode's internal files. It just adds files, and Xcode is smart enough to use the added files instead of the original snippets. You can roll back to the originals at any time by simply deleting the user version of the snippet. You can also run the script as many times as you want without worrying about overwriting any user snippets generated by previous runs of the script.

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