使用 CFBundleDocumentTypes 过滤拖放 NSView

Question

我有一个拖放 NSView ，它应该接受与我在 plist 的 CFBundleDocumentTypes 键下列出的相同的文件类型和扩展名。该应用程序接受 public.movi​​e 类型无法获取的任何类型的视频文件、文件夹和多个文件扩展名。

CFBundleDocumentTypes 的（相当长的）列表是：

    <key>CFBundleDocumentTypes</key>
<array>
    <dict>
        <key>CFBundleTypeName</key>
        <string>Folder</string>
        <key>CFBundleTypeOSTypes</key>
        <array>
            <string>fold</string>
        </array>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeName</key>
        <string>Movies</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
        <key>LSItemContentTypes</key>
        <array>
            <string>public.movie</string>
        </array>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>flv</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>Flash Video File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>ram</string>
            <string>rm</string>
            <string>rmvb</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>RealPlayer Media Files</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>vob</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>VOB File (DVD Video)</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>ogm</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>Ogg MPEG-4 Video File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>ogv</string>
        </array>
        <key>CFBundleTypeMIMETypes</key>
        <array>
            <string>video/ogg</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>Ogg Video File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>axv</string>
        </array>
        <key>CFBundleTypeMIMETypes</key>
        <array>
            <string>video/annodex</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>Annodex Video File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>avi</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>AVI container</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>mov</string>
            <string>moov</string>
            <string>qt</string>
        </array>
        <key>CFBundleTypeMIMETypes</key>
        <array>
            <string>video/quicktime</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>Apple QuickTime container</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>divx</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>DivX file</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>dv</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>DV file</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>wmv</string>
            <string>wm</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>Windows Media Video</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>mpg</string>
            <string>mpeg</string>
            <string>mpeg1</string>
            <string>mpeg2</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>multiplexed MPEG-1/2</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>m1v</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>MPEG-1 Video File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>ts</string>
            <string>m2ts</string>
            <string>mts</string>
            <string>mt2s</string>
        </array>
        <key>CFBundleTypeMIMETypes</key>
        <array>
            <string>video/mp2t</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>MPEG-2 Transport Stream</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>m2v</string>
            <string>mpv</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>MPEG-2 Video File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>mp4</string>
            <string>mpeg4</string>
            <string>m4v</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>MPEG-4 File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>3gp</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>3GPP File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>mkv</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>Matroska Video File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>webm</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>WebM Video File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
    </dict>
    <dict>
        <key>CFBundleTypeExtensions</key>
        <array>
            <string>nuv</string>
        </array>
        <key>CFBundleTypeName</key>
        <string>NuppleVideo File</string>
        <key>CFBundleTypeRole</key>
        <string>Viewer</string>
        <key>LSTypeIsPackage</key>
        <false/>
        <key>NSPersistentStoreTypeKey</key>
        <string>Binary</string>
    </dict>
</array>

我已经能够在 NSView 的 draggingEntered 方法中验证放置接受情况，但我希望能够运行 CFBundleDocumentTypes 的 >Info.plist 条目，而不是复制此方法中的所有条目。如何执行此操作，以便我的视图接受与 CFBundleDocumentTypes 条目中列出的完全相同的文件？

Answer 1

只需向您的包询问信息即可：

NSArray* documentTypes = [[[NSBundle mainBundle] infoDictionary]
                                    objectForKey:@"CFBundleDocumentTypes"];

这将返回一个字典数组，每个字典对应一种文件类型，您可以轻松地从中提取其他信息：

for(NSDictionary* docInfo in documentTypes)
{
    NSArray* fileExtensions = [docInfo objectForKey:@"CFBundleTypeExtensions"];
    //do something with this info
}

您可以将其与 -documentClassForType:NSDocumentController 的 code> 方法。这将 CFBundleTypeName Info.plist 键中的值作为类型。