iphone开发之获取系统磁盘大小和可用磁盘大小

NSFileManager包含非常丰富的信息，通过下面的方法可很容易的获取系统磁盘的大小和可用磁盘的大小

- (NSNumber *) totalDiskSpace

{

NSDictionary *fattributes = [[NSFileManager defaultManager] fileSystemAttributesAtPath:NSHomeDirectory()];

return [fattributes objectForKey:NSFileSystemSize];

}

- (NSNumber *) freeDiskSpace

{

NSDictionary *fattributes = [[NSFileManager defaultManager] fileSystemAttributesAtPath:NSHomeDirectory()];

return [fattributes objectForKey:NSFileSystemFreeSize];

}



参见NSFileManager的头文件尾部定义的字段，不难发现还有许多可以获取的信息的。

具体的都可以根据需求来获取。

FOUNDATION_EXPORT NSString * const NSFileType;

FOUNDATION_EXPORT NSString * const NSFileTypeDirectory;

FOUNDATION_EXPORT NSString * const NSFileTypeRegular;

FOUNDATION_EXPORT NSString * const NSFileTypeSymbolicLink;

FOUNDATION_EXPORT NSString * const NSFileTypeSocket;

FOUNDATION_EXPORT NSString * const NSFileTypeCharacterSpecial;

FOUNDATION_EXPORT NSString * const NSFileTypeBlockSpecial;

FOUNDATION_EXPORT NSString * const NSFileTypeUnknown;

FOUNDATION_EXPORT NSString * const NSFileSize;

FOUNDATION_EXPORT NSString * const NSFileModificationDate;

FOUNDATION_EXPORT NSString * const NSFileReferenceCount;

FOUNDATION_EXPORT NSString * const NSFileDeviceIdentifier;

FOUNDATION_EXPORT NSString * const NSFileOwnerAccountName;

FOUNDATION_EXPORT NSString * const NSFileGroupOwnerAccountName;

FOUNDATION_EXPORT NSString * const NSFilePosixPermissions;

FOUNDATION_EXPORT NSString * const NSFileSystemNumber;

FOUNDATION_EXPORT NSString * const NSFileSystemFileNumber;

FOUNDATION_EXPORT NSString * const NSFileExtensionHidden;

FOUNDATION_EXPORT NSString * const NSFileHFSCreatorCode;

FOUNDATION_EXPORT NSString * const NSFileHFSTypeCode;

#if MAC_OS_X_VERSION_10_2 <= MAC_OS_X_VERSION_MAX_ALLOWED || __IPHONE_2_0 <= __IPHONE_OS_VERSION_MAX_ALLOWED

FOUNDATION_EXPORT NSString * const NSFileImmutable;

FOUNDATION_EXPORT NSString * const NSFileAppendOnly;

FOUNDATION_EXPORT NSString * const NSFileCreationDate;

FOUNDATION_EXPORT NSString * const NSFileOwnerAccountID;

FOUNDATION_EXPORT NSString * const NSFileGroupOwnerAccountID;

#endif

#if MAC_OS_X_VERSION_10_4 <= MAC_OS_X_VERSION_MAX_ALLOWED || __IPHONE_2_0 <= __IPHONE_OS_VERSION_MAX_ALLOWED

FOUNDATION_EXPORT NSString * const NSFileBusy;

#endif

#if __IPHONE_4_0 <= __IPHONE_OS_VERSION_MAX_ALLOWED

FOUNDATION_EXPORT NSString * const NSFileProtectionKey NS_***AILABLE(NA, 4_0);

FOUNDATION_EXPORT NSString * const NSFileProtectionNone NS_***AILABLE(NA, 4_0);

FOUNDATION_EXPORT NSString * const NSFileProtectionComplete NS_***AILABLE(NA, 4_0);

#endif

FOUNDATION_EXPORT NSString * const NSFileSystemSize;

FOUNDATION_EXPORT NSString * const NSFileSystemFreeSize;

FOUNDATION_EXPORT NSString * const NSFileSystemNodes;

FOUNDATION_EXPORT NSString * const NSFileSystemFreeNodes;

@interface NSDictionary (NSFileAttributes)

- (unsigned long long)fileSize;

- (NSDate *)fileModificationDate;

- (NSString *)fileType;

- (NSUInteger)filePosixPermissions;

- (NSString *)fileOwnerAccountName;

- (NSString *)fileGroupOwnerAccountName;

- (NSInteger)fileSystemNumber;

- (NSUInteger)fileSystemFileNumber;

- (BOOL)fileExtensionHidden;

- (OSType)fileHFSCreatorCode;

- (OSType)fileHFSTypeCode;

#if MAC_OS_X_VERSION_10_2 <= MAC_OS_X_VERSION_MAX_ALLOWED || __IPHONE_2_0 <= __IPHONE_OS_VERSION_MAX_ALLOWED

- (BOOL)fileIsImmutable;

- (BOOL)fileIsAppendOnly;

- (NSDate *)fileCreationDate;

- (NSNumber *)fileOwnerAccountID;

- (NSNumber *)fileGroupOwnerAccountID;

#endif

@end