网站的建设的含义,自己建网站能赚钱吗,app网页设计,一流高职院校建设工作网站#xff08;配图的小故事还记得嘛#xff09; NSFileManager是一个单列类#xff0c;也是一个文件管理器。可以通过NSFileManager创建文件夹、创建文件、写文件、读文件内容等等基本功能。 下面将介绍NSFileManager文件操作的十个小功能。我们在Documents里面进行举例#… 配图的小故事还记得嘛 NSFileManager是一个单列类也是一个文件管理器。可以通过NSFileManager创建文件夹、创建文件、写文件、读文件内容等等基本功能。 下面将介绍NSFileManager文件操作的十个小功能。我们在Documents里面进行举例首先是获取Documents的路径。这个在iOS开发之沙盒机制SandBox)已经详细讲解过了。获取Documents路径方法如下 - (NSString *)getDocumentsPath
{//获取Documents路径NSArray *paths NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);NSString *path [paths objectAtIndex:0];NSLog(path:%, path);return path;
} 创建文件夹 -(void)createDirectory{NSString *documentsPath [self getDocumentsPath];NSFileManager *fileManager [NSFileManager defaultManager];NSString *iOSDirectory [documentsPath stringByAppendingPathComponent:iOS];BOOL isSuccess [fileManager createDirectoryAtPath:iOSDirectory withIntermediateDirectories:YES attributes:nil error:nil];if (isSuccess) {NSLog(success);} else {NSLog(fail);}
} 创建文件 -(void)createFile{NSString *documentsPath [self getDocumentsPath];NSFileManager *fileManager [NSFileManager defaultManager];NSString *iOSPath [documentsPath stringByAppendingPathComponent:iOS.txt];BOOL isSuccess [fileManager createFileAtPath:iOSPath contents:nil attributes:nil];if (isSuccess) {NSLog(success);} else {NSLog(fail);}
} 写文件 -(void)writeFile{NSString *documentsPath [self getDocumentsPath];NSString *iOSPath [documentsPath stringByAppendingPathComponent:iOS.txt];NSString *content 我要写数据啦;BOOL isSuccess [content writeToFile:iOSPath atomically:YES encoding:NSUTF8StringEncoding error:nil];if (isSuccess) {NSLog(write success);} else {NSLog(write fail);}
} 读取文件内容 -(void)readFileContent{NSString *documentsPath [self getDocumentsPath];NSString *iOSPath [documentsPath stringByAppendingPathComponent:iOS.txt];NSString *content [NSString stringWithContentsOfFile:iOSPath encoding:NSUTF8StringEncoding error:nil];NSLog(read success: %,content);
} 判断文件是否存在 - (BOOL)isSxistAtPath:(NSString *)filePath{NSFileManager *fileManager [NSFileManager defaultManager];BOOL isExist [fileManager fileExistsAtPath:filePath];return isExist;
} 计算文件大小 - (unsigned long long)fileSizeAtPath:(NSString *)filePath{NSFileManager *fileManager [NSFileManager defaultManager];BOOL isExist [fileManager fileExistsAtPath:filePath];if (isExist){unsigned long long fileSize [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];return fileSize;} else {NSLog(file is not exist);return 0;}
} 计算整个文件夹中所有文件大小 - (unsigned long long)folderSizeAtPath:(NSString*)folderPath{NSFileManager *fileManager [NSFileManager defaultManager];BOOL isExist [fileManager fileExistsAtPath:folderPath];if (isExist){NSEnumerator *childFileEnumerator [[fileManager subpathsAtPath:folderPath] objectEnumerator];unsigned long long folderSize 0;NSString *fileName ;while ((fileName [childFileEnumerator nextObject]) ! nil){NSString* fileAbsolutePath [folderPath stringByAppendingPathComponent:fileName];folderSize [self fileSizeAtPath:fileAbsolutePath];}return folderSize / (1024.0 * 1024.0);} else {NSLog(file is not exist);return 0;}
} 删除文件 -(void)deleteFile{NSString *documentsPath [self getDocumentsPath];NSFileManager *fileManager [NSFileManager defaultManager];NSString *iOSPath [documentsPath stringByAppendingPathComponent:iOS.txt];BOOL isSuccess [fileManager removeItemAtPath:iOSPath error:nil];if (isSuccess) {NSLog(delete success);}else{NSLog(delete fail);}
} 移动文件 - (void)moveFileName
{NSString *documentsPath [self getDocumentsPath];NSFileManager *fileManager [NSFileManager defaultManager];NSString *filePath [documentsPath stringByAppendingPathComponent:iOS.txt];NSString *moveToPath [documentsPath stringByAppendingPathComponent:iOS.txt];BOOL isSuccess [fileManager moveItemAtPath:filePath toPath:moveToPath error:nil];if (isSuccess) {NSLog(rename success);}else{NSLog(rename fail);}
} 重命名 - (void)renameFileName
{//通过移动该文件对文件重命名NSString *documentsPath [self getDocumentsPath];NSFileManager *fileManager [NSFileManager defaultManager];NSString *filePath [documentsPath stringByAppendingPathComponent:iOS.txt];NSString *moveToPath [documentsPath stringByAppendingPathComponent:rename.txt];BOOL isSuccess [fileManager moveItemAtPath:filePath toPath:moveToPath error:nil];if (isSuccess) {NSLog(rename success);}else{NSLog(rename fail);}
} 以上文件操作代码都在iOSStrongDemo可以直接通过git拉下来进行测试。关于NSFileManager的用法还有很多一起接续探索吧转载于:https://www.cnblogs.com/xvewuzhijing/p/5003862.html
