使用Cocoa获取可卸载驱动器的列表

Question

我想获得在OS X下使用Cocoa / Objective-C不可卸载/弹出的驱动器列表。

我希望NSWorkspace getFileSystemInfoForPath :::::可以帮助我：

NSArray* listOfMedia = [[NSWorkspace sharedWorkspace] mountedLocalVolumePaths];
NSLog(@"%@", listOfMedia);

for (NSString* volumePath in listOfMedia)
{
    BOOL isRemovable = NO;
    BOOL isWritable  = NO;
    BOOL isUnmountable = NO;
    NSString* description = [NSString string];
    NSString* type = [NSString string];

    BOOL result = [[NSWorkspace sharedWorkspace] getFileSystemInfoForPath:volumePath 
                                                             isRemovable:&isRemovable 
                                                              isWritable:&isWritable 
                                                              isUnmountable:&isUnmountable 
                                                                description:&description
                                                                       type:&type];
    NSLog(@"Result:%i Volume: %@, Removable:%i, W:%i, Unmountable:%i, Desc:%@, type:%@", result, volumePath, isRemovable, isWritable, isUnmountable, description, type);
}

输出：

...
Result:1 Volume: /Volumes/LR Photos, Removable:0, W:1, Unmountable:0, Desc:hfs, type:hfs
...

“ LR照片”是一个外部驱动器（通过Thunderbolt连接），应该可移动和/或不可安装（或者至少应该是可拆卸的）。:)

我应该以不同的方式去做吗？

提前致谢！

Answer 1

您可以使用diskArbitration framework。

#import <DiskArbitration/DiskArbitration.h>
   +(NSMutableArray *)getListOfEjectableMedia
{
    NSArray *mountedRemovableMedia = [[NSFileManager defaultManager] mountedVolumeURLsIncludingResourceValuesForKeys:nil options:NSVolumeEnumerationSkipHiddenVolumes];
    NSMutableArray *result = [NSMutableArray array];
    for(NSURL *volURL in mountedRemovableMedia)
    {
        int                 err = 0;
        DADiskRef           disk;
        DASessionRef        session;
        CFDictionaryRef     descDict;
        session = DASessionCreate(NULL);
        if (session == NULL) {
            err = EINVAL;
        }
        if (err == 0) {
            disk = DADiskCreateFromVolumePath(NULL,session,(CFURLRef)volURL);
            if (session == NULL) {
                err = EINVAL;
            }
        }
        if (err == 0) {
            descDict = DADiskCopyDescription(disk);
            if (descDict == NULL) {
                err = EINVAL;
            }
        }
        if (err == 0) {
            CFTypeRef mediaEjectableKey = CFDictionaryGetValue(descDict,kDADiskDescriptionMediaEjectableKey);
            CFTypeRef deviceProtocolName = CFDictionaryGetValue(descDict,kDADiskDescriptionDeviceProtocolKey);
            if (mediaEjectableKey != NULL)
            {
                BOOL op = CFEqual(mediaEjectableKey, CFSTR("0")) || CFEqual(deviceProtocolName, CFSTR("USB"));
                if (op) {
                    [result addObject:volURL];
                }
            }
        }
        if (descDict != NULL) {
            CFRelease(descDict);
        }
        if (disk != NULL) {
            CFRelease(disk);
        }
        if (session != NULL) {
            CFRelease(session);
        }
    }
    return result;
}