Objective-C NSFileManager的使用 各种文件操作

所有方法

都很简单，大概记录一下，写文件并没有是追加的方式而是简单的覆盖

//创建文件夹- (BOOL)creatDir:(NSString*)newDirName at:(NSString*)dirName ;//创建文件- (BOOL)creatFile:(NSString*)fileName at:(NSString*)dirName ;//写文件-字符串- (BOOL)writeString:(NSString*)string inFilePath:(NSString*)filePath;//写文件-字典- (BOOL)writeDict:(NSDictionary*)dict inFilePath:(NSString*)filePath ;//写文件-数组- (BOOL)writeArray:(NSArray*)array inFilePath:(NSString*)filePath ;//读文件 - (NSString*)readFileAt:(NSString*)filePath;//获取某个目录下所有文件- (NSArray*)getAllFileAtDir:(NSString*)dirPath ;//判断文件是否存在- (BOOL)fileIsExistAtPath:(NSString*)filePath ;//计算某个文件大小- (unsigned long long)computerFileSizeAtPath:(NSString*)filePath;//计算整个文件夹中所有文件大小- (unsigned long long)computerDirSizeAtPath:(NSString*)dirPath;//删除文件- (BOOL)removeFileAtPath:(NSString*)filePath;//移动文件- (BOOL)moveFile:(NSString*)fileName fromPath:(NSString*)fromPath toPath:(NSString*)toPath;

具体实现

初始化一下NSFileManager 并获取根路径
主要是加了一些判断，代码不是很精简 不要笑我。

- (instancetype)init {    self = [super init];    if (self) {        self.homePath = NSHomeDirectory();        self.manager = [NSFileManager defaultManager];        NSLog(@"根路径地址：%@",self.homePath);    }    return self;}

//创建文件夹- (BOOL)creatDir:(NSString*)newDirName at:(NSString*)dirName {    NSString *path = [self.homePath stringByAppendingString:dirName];    NSString *filePath = [path stringByAppendingPathComponent:newDirName];    if ([self.manager fileExistsAtPath:filePath]) {        NSLog( @"创建失败，目录已存在");    }else {        BOOL isCreate = [self.manager createDirectoryAtPath:filePath withIntermediateDirectories:NO attributes:nil error:nil];        if (isCreate) {            NSLog( @"创建成功");            return YES;        } else {            NSLog( @"创建失败，请检查路径");            return NO;        }    }    return NO;}

//创建文件- (BOOL)creatFile:(NSString*)fileName at:(NSString*)dirName {    //目录位置    NSString *dirPath = [self.homePath stringByAppendingString:dirName];    //文件位置    NSString *filePath = [dirPath stringByAppendingPathComponent:fileName];    BOOL isDir = NO;    BOOL isFileExist = [self.manager fileExistsAtPath:dirPath isDirectory:&isDir];    //目录是否存在    if (!(isFileExist && isDir)) {        NSLog(@"目录不存在,请先创建目录");        return NO;    }    //文件是否存在    if (![self.manager fileExistsAtPath:filePath]) {        BOOL isCreate = [self.manager createFileAtPath:filePath contents:nil attributes:nil];        if (isCreate) {            NSLog(@"创建成功");            return YES;        } else {            NSLog(@"创建失败");            return NO;        }    }    else {        NSLog(@"创建失败，文件已存在");        return NO;    }    return NO;}

//写文件-字符串- (BOOL)writeString:(NSString*)string inFilePath:(NSString*)filePath{    NSString *path = [self.homePath stringByAppendingString:filePath];    BOOL isFileExist = [self.manager fileExistsAtPath:path];    if (isFileExist) {        BOOL isWrite = [string writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:nil];        if (isWrite) {            NSLog(@"写入成功");            return YES;        } else {            NSLog( @"写入失败");            return NO;        }    }else{        NSLog(@"文件不存在,请先创建文件");        return NO;    }    return NO;}

//写文件-字典- (BOOL)writeDict:(NSDictionary*)dict inFilePath:(NSString*)filePath {    NSString *path = [self.homePath stringByAppendingString:filePath];    BOOL isFileExist = [self.manager fileExistsAtPath:path];    if (isFileExist) {        BOOL isWrite = [dict writeToFile:path atomically:YES];        if (isWrite) {            NSLog(@"写入成功");            return YES;        } else {            NSLog(@"写入失败");            return NO;        }    }else{        NSLog(@"文件不存在,请先创建文件");        return NO;    }    return NO;}

//写文件-数组- (BOOL)writeArray:(NSArray*)array inFilePath:(NSString*)filePath {    NSString *path = [self.homePath stringByAppendingString:filePath];    BOOL isFileExist = [self.manager fileExistsAtPath:path];    if (isFileExist) {        BOOL isWrite = [array writeToFile:path atomically:YES];        if (isWrite) {            NSLog(@"写入成功");            return YES;        } else {            NSLog(@"写入失败");            return NO;        }    }else{        NSLog(@"文件不存在,请先创建文件");        return NO;    }    return NO;}

//读文件- (NSString*)readFileAt:(NSString*)filePath{    NSString *path = [self.homePath stringByAppendingString:filePath];    NSData *data = [self.manager contentsAtPath:path];    NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];    return result;}

//获取某个目录下所有文件- (NSArray*)getAllFileAtDir:(NSString*)dirPath {    NSString *path = [self.homePath stringByAppendingString:dirPath];    NSArray *dirArray = [self.manager contentsOfDirectoryAtPath:path error:nil];    return dirArray;}

//判断文件是否存在- (BOOL)fileIsExistAtPath:(NSString*)filePath {    NSString *path = [self.homePath stringByAppendingString:filePath];    BOOL isFileExist = [self.manager fileExistsAtPath:path];    if (isFileExist) {        NSLog(@"文件存在");        return YES;    }  else {        NSLog(@"文件不存在");        return NO;    }    return NO;}

//计算某个文件大小 单位是字节- (unsigned long long)computerFileSizeAtPath:(NSString*)filePath {    NSString *path = [self.homePath stringByAppendingString:filePath];    BOOL isDir;    BOOL isFile = [self.manager fileExistsAtPath:path isDirectory:&isDir];    if (!isDir) {        if (!isFile) {            NSLog(@"文件不存在");            return 0;        }else {            unsigned long long fileSize = [self.manager attributesOfItemAtPath:path error:nil].fileSize;            return fileSize;        }    }  else {        NSLog( @"该文件是一个目录");        return 0;    }    return 0;}

//计算整个文件夹中所有文件大小- (unsigned long long)computerDirSizeAtPath:(NSString*)dirPath {    NSString *path = [self.homePath stringByAppendingString:dirPath];    BOOL isExist = [self.manager fileExistsAtPath:path];    if (isExist) {        NSEnumerator *childFilesEnumerator = [[self.manager subpathsAtPath:path] objectEnumerator];        NSString* fileName;        long long folderSize = 0;        while ((fileName = [childFilesEnumerator nextObject]) != nil){            NSString* fileAbsolutePath = [path stringByAppendingPathComponent:fileName];            folderSize += [self.manager attributesOfItemAtPath:fileAbsolutePath error:nil].fileSize;        }        return folderSize;    } else {        NSLog(@"目录不存在");        return 0;    }    return 0;}

//删除文件- (BOOL)removeFileAtPath:(NSString*)filePath {    NSString *path = [self.homePath stringByAppendingString:filePath];    if ([self.manager fileExistsAtPath:path]) {        BOOL isRemove = [self.manager removeItemAtPath:path error:nil];        if (!isRemove) {            NSLog(@"移除失败");            return NO;        } else {            NSLog(@"移除成功");            return YES;        }    } else {        NSLog(@"文件不存在");        return NO;    }      return NO;}

//移动文件- (BOOL)moveFile:(NSString*)fileName fromPath:(NSString*)fromPath toPath:(NSString*)toPath {    NSString *fPath = [self.homePath stringByAppendingString:fromPath];    NSString *src = [fPath stringByAppendingPathComponent:fileName];    NSString *tPath = [self.homePath stringByAppendingString:toPath];    NSString *des = [tPath stringByAppendingPathComponent:fileName];    if (![self.manager fileExistsAtPath:src]) {        NSLog(@"文件不存在");        return NO;    }else {        if (![self.manager fileExistsAtPath:tPath]) {            NSLog(@"目标路径不存在");            return NO;        } else {            BOOL move = [self.manager moveItemAtPath:src toPath:des error:nil];            if (move) {                NSLog( @"移动成功");                return YES;            } else {                NSLog(@"移动失败");                return NO;            }        }    }    return NO;}