iphone-common-codes-ccteam源代码 CCFileUtil.m

//
//  CCFileUtil.m
//  CCFC
//
//  Created by xichen on 11-12-16.
//  Copyright 2011 ccteam. All rights reserved.
//

#import "CCFileUtil.h"
#import "CCRandom.h"

@implementation CCFileUtil

//获取应用程序的文档目录
+ (NSString *)getDocFolder
{
NSArray *userPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
return [userPaths objectAtIndex:0];
}

// 获取应用程序文档目录中某个指定文件全路径
+ (NSString *)getFileFullPathInDocument:(NSString *)fileName
{
NSString *docPath = [self getDocFolder];
return [docPath stringByAppendingPathComponent:fileName];
}

// 获取应用程序Library目录路径
+ (NSString *)getLibFolder
{
NSArray *libPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
return [libPaths objectAtIndex:0];
}

//获取应用程序Library目录中某个指定文件全路径
+ (NSString *)getFileFullPathInLibFolder:(NSString *)fileName
{
NSString *libPath = [self getLibFolder];
return [libPath stringByAppendingPathComponent:fileName];
}

// 获取应用程序bundle路径
+ (NSString *)getBundleFolder
{
return APP_DIR;
}

// 获取文件在bundle路径的全路径名
+ (NSString *)getFileFullPathInBundlePath:(NSString *)fileName
{
NSString *bundlePath = [self getBundleFolder];
return [bundlePath stringByAppendingPathComponent:fileName];
}

// 获取文件路径的父目录名称
+ (NSString *)getParentFolder:(NSString *)filePath
{
int i;
for (i = filePath.length - 2; i >= 0; i--)
{
if([filePath characterAtIndex:i] == '/')
{
break;
}
}

if(i == filePath.length - 2 || i == 0)
{
return nil;
}

return [filePath substringToIndex:i];
}

// 如果文件在Document目录中不存在，那么拷贝一份; 如果已存在，不拷贝
+ (BOOL)copyFileToDocumentFolderIfNotExist:(NSString *)fileName
{
NSString *destFileFullPath = [self getFileFullPathInDocument:fileName];
NSFileManager *fileManager = [NSFileManager defaultManager];

if(![fileManager fileExistsAtPath:destFileFullPath])
{
NSString *bundleFileFullPath = [RES_DIR stringByAppendingPathComponent:fileName];

BOOL ret = [fileManager copyItemAtPath:bundleFileFullPath toPath:destFileFullPath error:nil];

return ret;
}

return TRUE;
}

// 将文件拷贝到Document目录中，如果已存在，覆盖
+ (BOOL)copyFileToDocumentFolder:(NSString *)fileName
{
NSString *destFileFullPath = [self getFileFullPathInDocument:fileName];
NSFileManager *fileManager = [NSFileManager defaultManager];

if([fileManager fileExistsAtPath:destFileFullPath])
{
if(![fileManager removeItemAtPath:destFileFullPath error:nil])
{
return FALSE;
}
}
NSString *bundleFileFullPath = [RES_DIR stringByAppendingPathComponent:fileName];
return [fileManager copyItemAtPath:bundleFileFullPath toPath:destFileFullPath error:nil];
}

// 删除指定文件夹下指定文件名的文件
+ (BOOL)deleteFileInFolder:(NSString *)folder withFileName:(NSString *)fileName
{
NSString *destFileFullPath = [folder stringByAppendingPathComponent:fileName];
NSFileManager *fileManager = [NSFileManager defaultManager];
if(![fileManager fileExistsAtPath:destFileFullPath])
{
return FALSE;
}

return [fileManager removeItemAtPath:destFileFullPath error:nil];
}

// 删除应用程序Document目录中的指定文件
+ (BOOL)deleteFileInDocFolder:(NSString *)fileName
{
return [self deleteFileInFolder:[self getDocFolder] withFileName:fileName];
}

// delete a folder
+ (BOOL)deleteFolder:(NSString *)folderPath
{
return [self deleteFileInFolder:folderPath withFileName:@""];
}

// 文件是否存在
+ (BOOL)isFileExist:(NSString *)filePath
{
NSFileManager *fileManager = [NSFileManager defaultManager];
return ([fileManager fileExistsAtPath:filePath]);
}

// 重命名指定路径下某个文件为另一个文件名
+ (BOOL)rename:(NSString *)srcFileFolder srcFileName:(NSString *)srcName
toFileName:(NSString *)destName
{
return [self rename:srcFileFolder srcFileName:srcName
destFolder:srcFileFolder destFileName:destName];
}

// 重命名指定路径下某个文件为指定目录下的另一个文件名
+ (BOOL)rename:(NSString *)srcFileFolder srcFileName:(NSString *)srcName
destFolder:(NSString *)destFolder destFileName:(NSString *)destName
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *srcFullPath = [NSString stringWithFormat:@"%@/%@", srcFileFolder, srcName];
if([fileManager fileExistsAtPath:srcFullPath])
return FALSE;

NSString *destFullPath = [NSString stringWithFormat:@"%@/%@", destFolder, destName];
BOOL ret = [fileManager copyItemAtPath:srcFullPath toPath:destFullPath error:nil];
if(!ret)
return FALSE;

ret = [fileManager removeItemAtPath:srcFullPath error:nil];
return ret;
}

// 判断是否是目录
+ (BOOL)isFolder:(NSString *)filePath
{
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL ret;
BOOL isExist = [fileManager fileExistsAtPath:filePath isDirectory:&ret];
return (isExist && ret);
}

// 获取目录下第一级的所有文件
+ (NSArray *)getAllFilesAtFolder:(NSString *)path
{
NSFileManager *fileManager = [NSFileManager defaultManager];
return [fileManager contentsOfDirectoryAtPath:path error:nil];
}

+ (NSString *)systemLibraryPath:(NSString *)name
{
return [name systemLibraryPath];
}

// returns whether the path is an absolute path
+ (BOOL)isAbsolutePath:(NSString *)path
{
return [path isAbsolutePath];
}

// generate a new file in folder, not create
+ (NSString *)generateNewFile:(NSString *)folder
{
NSString *tempFileName;
int len = 4;
BOOL generateNewFileOK = FALSE;

while (!generateNewFileOK)
{
tempFileName = [CCRandom generateRandomStringByLen:len];
generateNewFileOK = ![CCFileUtil isFileExist:
[folder stringByAppendingFormat:@"/%@", tempFileName]];
if(!generateNewFileOK)
++len;
if(len == INT_MAX)
return nil;
}
return tempFileName;
}

// create a new file(not a folder) in the indicated folder
+ (NSString *)createNewFileInFolder:(NSString *)folder
{
NSFileManager *fileManager = [NSFileManager defaultManager];

NSString *tempFileName = [self generateNewFile:folder];
if(tempFileName == nil)
return nil;

NSString *fileFullPath = [NSString stringWithFormat:@"%@/%@", folder, tempFileName];
if([fileManager createFileAtPath:fileFullPath contents:nil attributes:nil])
return tempFileName;
return nil;
}

// get the current directory
+ (NSString *)getCurrentDirectory
{
NSFileManager *fileManager = [NSFileManager defaultManager];
return [fileManager currentDirectoryPath];
}

// change the current directory to the indicated directory
+ (BOOL)changeCurrentDirectoryToDirectory:(NSString *)newDir
{
NSFileManager *fileManager = [NSFileManager defaultManager];
return [fileManager changeCurrentDirectoryPath:newDir];
}

// enumerator all files in folder
+ (NSArray *)enumAllFilesInFolder:(NSString *)folder
{
NSMutableArray *arr = [NSMutableArray array];
NSString *file;
NSDirectoryEnumerator *enumerator =
[[NSFileManager defaultManager] enumeratorAtPath:folder];
while(file = [enumerator nextObject])
{
[arr addObject:file];
}
return arr;
}

// get the home directory
+ (NSString *)getHomeDir
{
return NSHomeDirectory();
}

@end