(MACOSX)-了解是否已从DMG安装了已安装的设备 [英] (MACOSX) - Knowing whether a mounted device was mounted from a DMG

问题描述

使用DiskArbitration或FSGetVolumeInfo/GetVolumeParms找不到该信息...

Couldn't find that info using DiskArbitration or FSGetVolumeInfo/GetVolumeParms...

我知道hdiutil使用一个称为DiskImages框架的私有框架，但是我不想每次想要此信息时都运行一个外部实用程序……该API的位置在哪里?

I know that hdiutil uses a private framework called DiskImages framework, but I wouldn't want to run an external utility each time I want this info... wheres the API for this ?

推荐答案

2015年7月更新

此更新是由Stan James的您可以使用获取此信息. DiskArbitration 框架.要使用下面的示例，您必须链接并#import它.

You can obtain this information using the DiskArbitration framework. To use the example below, you must link against and #import it.

#import <DiskArbitration/DiskArbitration.h>

...

- (BOOL)isDMGVolumeAtURL:(NSURL *)url
{

  BOOL isDMG = NO;

  if (url.isFileURL) {

    DASessionRef session = DASessionCreate(kCFAllocatorDefault);
    if (session != nil) {

      DADiskRef disk = DADiskCreateFromVolumePath(kCFAllocatorDefault, session, (__bridge CFURLRef)url);
      if (disk != nil) {

        NSDictionary * desc = CFBridgingRelease(DADiskCopyDescription(disk));
        NSString * model = desc[(NSString *)kDADiskDescriptionDeviceModelKey];
        isDMG = ([model isEqualToString:@"Disk Image"]);

        CFRelease(disk);

      }

      CFRelease(session);

    }

  }

  return isDMG;

}

用法:

BOOL isDMG = [someObject isDMGVolumeAtURL:[NSURL fileURLWithPath:@"/Volumes/Some Volume"]];

我希望这会有所帮助.

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