导出的 UTI 未被 macOS 接收

Question

我正在尝试在我的应用程序中导出 UTI，但 macOS (10.3.2) 没有提取它。我在一个较小的项目中复制了我的问题。这是 info.plist 的相关部分：

<key>UTExportedTypeDeclarations</key>
<array>
    <dict>
        <key>UTTypeConformsTo</key>
        <array>
            <string>public.plain-text</string>
        </array>
        <key>UTTypeDescription</key>
        <string>Demo of custom file support</string>
        <key>UTTypeIconFile</key>
        <string>File-512</string>
        <key>UTTypeIdentifier</key>
        <string>am.customfiledemo.demotxt</string>
        <key>UTTypeTagSpecification</key>
        <dict>
            <key>public.filename-extension</key>
            <array>
                <string>demotxt</string>
            </array>
            <array/>
        </dict>
    </dict>
</array>

我试过重新启动，甚至重建启动服务数据库，但都没有效果：

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain ststem -domain user -v

当我使用

检查文件的 UTI 时

mdls -name kMDItemContentType -name kMDItemContentTypeTree file.demotxt

我得到了动态 (dyn.*) UTI，而不是 am.customfiledemo.demotxt

kMDItemContentType                 = "dyn.ah62d4rv4ge80k3prr74hu7a"
kMDItemContentTypeTree             = (
    "dyn.ah62d4rv4ge80k3prr74hu7a",
    "public.data",
    "public.item"
)

Answer 1

使UTI符合public.data或com.apple.package:

Although a custom UTI can conform to any UTI, public.data or com.apple.package must be at the root of the conformance hierarchy for all custom UTIs that are file formats (such as documents); otherwise, the system can’t tell if an item on disk has that UTI.

- Uniform Type Identifiers Overview, Declaring New Uniform Type Identifiers, Recommendations for Declaring new Uniform Type Identifiers

导出的 UTI 未被 macOS 接收

Exported UTI not being picked up by macOS

macos

cocoa

nsdocument

uti