用于 Adobe® Flash® Platform 的 ActionScript® 3.0 参考
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flash.filesystem 

StorageVolume  - AS3

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如何使用 ActionScript 示例
法律声明
flash.filesystem
public class StorageVolume
继承StorageVolume Inheritance Object

语言版本: ActionScript 3.0
运行时版本: AIR 2

StorageVolume 对象包括定义大容量存储卷的属性。此类有两种使用方式:
  • StorageVolumeChangeEvent 对象的 storageVolume 属性是 StorageVolume 对象。此对象表示已安装或已卸载的存储卷。
  • StorageVolumeInfo.storageVolumeInfo.getStorageVolumes() 方法返回 StorageVolume 对象的一个矢量。每个 StorageVolume 对象分别表示一个安装的存储卷。

查看示例

相关 API 元素



公共属性
 属性由以下参数定义
 Inheritedconstructor : Object
对类对象或给定对象实例的构造函数的引用。
Object
      drive : String
[只读] Windows 上的卷驱动器号。
StorageVolume
      fileSystemType : String
[只读] 存储卷上的文件系统类型(如“FAT”、“NTFS”、“HFS”或“UFS”)。
StorageVolume
      isRemovable : Boolean
[只读] 操作系统将存储卷视为可删除 (true) 还是不可删除 (false)。
StorageVolume
      isWritable : Boolean
[只读] 卷是可写 (true) 还是不可写 (false)。
StorageVolume
      name : String
[只读] 卷的名称。
StorageVolume
      rootDirectory : File
[只读] 与卷的根目录对应的 File 对象。
StorageVolume
公共方法
 方法由以下参数定义
  
    StorageVolume(rootDirPath:File, name:String, writable:Boolean, removable:Boolean, fileSysType:String, drive:String)
构造函数。
StorageVolume
 Inherited
表示对象是否已经定义了指定的属性。
Object
 Inherited
表示 Object 类的实例是否在指定为参数的对象的原型链中。
Object
 Inherited
表示指定的属性是否存在、是否可枚举。
Object
 Inherited
设置循环操作动态属性的可用性。
Object
 Inherited
返回此对象的字符串表示形式,其格式设置遵守区域设置特定的约定。
Object
 Inherited
返回指定对象的字符串表示形式。
Object
 Inherited
返回指定对象的原始值。
Object
属性详细信息
    

drive

属性
drive:String  [只读]

语言版本: ActionScript 3.0
运行时版本: AIR 2

Windows 上的卷驱动器号。在其他平台上,此属性设置为 null



实现
    public function get drive():String
    

fileSystemType

属性 
fileSystemType:String  [只读]

语言版本: ActionScript 3.0
运行时版本: AIR 2

存储卷上的文件系统类型(如“FAT”“NTFS”“HFS”“UFS”)。



实现
    public function get fileSystemType():String

示例  ( 如何使用本示例 )
以下代码列出根目录的本机路径和每个安装的存储卷的文件系统类型:
var volumes:Vector.<StorageVolume> = new Vector.<StorageVolume>;
volumes = StorageVolumeInfo.storageVolumeInfo.getStorageVolumes();
for (var i:int = 0; i < volumes.length; i++)
{
    trace(volumes[i].rootDirectory.nativePath, "(" + volumes[i].fileSystemType + ")");
}
    

isRemovable

属性 
isRemovable:Boolean  [只读]

语言版本: ActionScript 3.0
运行时版本: AIR 2

操作系统将存储卷视为可删除 (true) 还是不可删除 (false)。

下表列出了各种设备类型的 StorageVolume.isRemovable 属性的值:

设备类型Mac OSWindowsLinux
CD/DVD(固定)truetruetrue
USB 闪存驱动器truetruetrue
USB 硬盘驱动器falsefalsetrue
FireWire 硬盘驱动器falsefalsetrue
共享卷truefalse- 1
网络驱动器falsefalsefalse
存储卡读取器(空)- 2false- 2
存储卡读取器(带有 SD/CF 卡)truetruetrue

1 Linux 没有共享卷的概念。

2 在 Windows 上,空读卡器作为不可移除的设备列出。在 Mac OS 和 Linux 上,空读卡器不作为存储卷列出。



实现
    public function get isRemovable():Boolean

示例  ( 如何使用本示例 )
以下代码依次输出不可删除存储卷的列表和可删除存储卷的列表:
var volumes:Vector.<StorageVolume> = new Vector.<StorageVolume>;
volumes = StorageVolumeInfo.storageVolumeInfo.getStorageVolumes();

trace("Non-removeable volumes:");
for (var i:int = 0; i < volumes.length; i++)
{
    if (!volumes[i].isRemovable)
    {
        trace(volumes[i].rootDirectory.nativePath);
    }
}

trace("\nRemoveable volumes:");
for (i = 0; i < volumes.length; i++)
{
    if (volumes[i].isRemovable)
    {
        trace(volumes[i].rootDirectory.nativePath);
    }
}
    

isWritable

属性 
isWritable:Boolean  [只读]

语言版本: ActionScript 3.0
运行时版本: AIR 2

卷是可写 (true) 还是不可写 (false)。

注意:可通过调用 StorageVolume 对象的 rootDirectory.spaceAvailble 属性确定卷上的可用空间量。



实现
    public function get isWritable():Boolean

相关 API 元素

flash.fileSystem.File.spaceAvailable

示例  ( 如何使用本示例 )
以下代码输出可写存储卷列表及每个卷上的可用空间:
var volumes:Vector.<StorageVolume> = new Vector.<StorageVolume>;
volumes = StorageVolumeInfo.storageVolumeInfo.getStorageVolumes();

for (var i:int = 0; i < volumes.length; i++)
{
    if(volumes[i].isWritable)
    {         
        trace(volumes[i].rootDirectory.nativePath, volumes[i].rootDirectory.spaceAvailable);
    }
}
    

name

属性 
name:String  [只读]

语言版本: ActionScript 3.0
运行时版本: AIR 2

卷的名称。如果没有名称,此属性设置为 null



实现
    public function get name():String

示例  ( 如何使用本示例 )
以下代码列出根目录的本机路径及每个安装的存储卷的文件系统名称(如果有):
var volumes:Vector.<StorageVolume> = new Vector.<StorageVolume>;
volumes = StorageVolumeInfo.storageVolumeInfo.getStorageVolumes();
for (var i:int = 0; i < volumes.length; i++)
{
    var name:String = new String();
    if (volumes[i].name)
    {
        name = "(" + volumes[i].name + ")";
    }
    trace(volumes[i].rootDirectory.nativePath, name);
}
    

rootDirectory

属性 
rootDirectory:File  [只读]

语言版本: ActionScript 3.0
运行时版本: AIR 2

与卷的根目录对应的 File 对象。



实现
    public function get rootDirectory():File

示例  ( 如何使用本示例 )
下列代码列出了每个装载的存储卷的根目录的本机路径:
var volumes:Vector.<StorageVolume> = new Vector.<StorageVolume>;
volumes = StorageVolumeInfo.storageVolumeInfo.getStorageVolumes();
for (var i:int = 0; i < volumes.length; i++)
{
    trace(volumes[i].rootDirectory.nativePath);
}
构造函数详细信息
    

StorageVolume

()构造函数
public function StorageVolume(rootDirPath:File, name:String, writable:Boolean, removable:Boolean, fileSysType:String, drive:String)

语言版本: ActionScript 3.0
运行时版本: AIR 2

构造函数。通常,您不直接调用此构造函数(以创建新的 StorageVolume 对象),而是通过访问 StorageVolumeChangeEvent 对象的 storageVolume 属性或调用 StorageVolumeInfo.storageVolumeInfo.getStorageVolumes() 来引用 StorageVolume 对象。

参数
rootDirPath:File
 
name:String
 
writable:Boolean
 
removable:Boolean
 
fileSysType:String
 
drive:String
StorageVolumeExample.as

以下代码列出每个安装的存储卷的属性:
package
{
    import flash.display.Sprite;
    import flash.filesystem.StorageVolume;
    import flash.filesystem.StorageVolumeInfo;

    public class StorageVolumeExample extends Sprite
    {
        public function StorageVolumeExample()
        {
            var volumes:Vector.<StorageVolume> = StorageVolumeInfo.storageVolumeInfo.getStorageVolumes();
            for (var i:int = 0; i < volumes.length; i++)
            {
                var volume:StorageVolume = volumes[i];
                trace("nativePath:", volume.rootDirectory.nativePath);
                trace("fileSystemType:", volume.fileSystemType);
                trace("isRemovable:", volume.isRemovable);
                trace("isWritable:", volume.isWritable);
                trace("drive:", volume.drive);
                trace("name:", volume.name);
                trace("________________________________________________________");
            }
        }
    }
}
StorageVolumeChangeEventExample.as

以下代码列出每个已安装或已卸载的存储卷的属性。请注意,仅为 storageVolumeMount 事件设置 StorageVolumeChangeEvent 的 storageVolume 属性;对于 storageVolumeUnmount 事件,该属性为 null
package
{
    import flash.display.Sprite;
    import flash.events.StorageVolumeChangeEvent;
    import flash.filesystem.StorageVolume;
    import flash.filesystem.StorageVolumeInfo;

    public class StorageVolumeChangeEventExample extends Sprite
    {
        public function StorageVolumeChangeEventExample()
        {
            StorageVolumeInfo.storageVolumeInfo.addEventListener(StorageVolumeChangeEvent.STORAGE_VOLUME_MOUNT, mountEventHandler);
            StorageVolumeInfo.storageVolumeInfo.addEventListener(StorageVolumeChangeEvent.STORAGE_VOLUME_UNMOUNT, unmountEventHandler);
        }
        public function mountEventHandler(event:StorageVolumeChangeEvent):void
        {            
            var volume:StorageVolume = event.storageVolume;
            trace("VOLUME MOUNTED:");
            trace("nativePath:", event.rootDirectory.nativePath);
            trace("fileSystemType:", volume.fileSystemType);
            trace("isRemovable:", volume.isRemovable);
            trace("isWritable:", volume.isWritable);
            trace("drive:", volume.drive);
            trace("name:", volume.name);
            trace();
        }
        public function unmountEventHandler(event:StorageVolumeChangeEvent):void
        {            
            trace("VOLUME UNMOUNTED:");
            trace("nativePath:", event.rootDirectory.nativePath);
            trace();
        }        
    }
}




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《ActionScript 3.0 参考》中的内容以英语显示

《ActionScript 3.0 参考》中的部分内容未翻译成所有语言。当某个语言元素未翻译时,将显示为英语。例如,ga.controls.HelpBox 类未翻译成任何语言。因此在简体中文版的参考中,ga.controls.HelpBox 类显示为英语。