OC-NSFileManger常见处理方式

最新推荐文章于 2019-04-21 14:30:56 发布

原创最新推荐文章于 2019-04-21 14:30:56 发布 · 658 阅读

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本文详细介绍了使用Objective-C创建、删除、移动、复制、读取文件的基本操作，包括文件属性判断、目录创建与文件信息获取等核心内容。

    //创建文件对象
    NSFileManager *manager = [NSFileManager defaultManager];
    
    NSString *content = @"张三";
    
    
    NSError *createError;
    
    NSString* native =  [NSHomeDirectory() stringByAppendingString:@"/Documents/Test"];
    NSString* target =  [NSHomeDirectory() stringByAppendingString:@"/Documents/Test/5.txt"];
    
    
    
    
    //创建文件
    [manager createDirectoryAtPath:native withIntermediateDirectories:true attributes:nil error:&createError];
    
    //创建文件
    [manager createFileAtPath:[native stringByAppendingString:@"/text.txt"] contents:[content dataUsingEncoding:NSUTF8StringEncoding] attributes:nil];
    
    //文件信息
    NSLog(@"文件错误信息%@",[createError localizedDescription]);
    
    
    
    
    
    
    NSError *errorMessage;
    
    //文件重名 只能对当前目录进行重名
    if ([manager moveItemAtPath:[native stringByAppendingString:@"/4.txt"] toPath:target error:&errorMessage] != YES) {
        NSLog(@"Unable to move file %@",[errorMessage localizedDescription]);
    }
    
    //显示当前文件下内容
    NSLog(@"Directroy content %@",[manager contentsOfDirectoryAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"] error:&errorMessage]);
    
    
    
    
    //移除文件
    [manager removeItemAtPath:target error:nil];
    
    //拷贝文件
    [manager copyItemAtPath:native toPath:target error:nil];

    //读取文件数据
    NSLog(@"%@",[[NSString alloc] initWithData:[manager contentsAtPath:target] encoding:NSUTF8StringEncoding]);

    
    
    NSString* Home = [NSHomeDirectory() stringByAppendingString:@"/Documents"];
    
    BOOL isExists;
    
    //判断是不是目录
    [manager fileExistsAtPath:Home isDirectory:&isExists];
    //判断是不是文件
    [manager fileExistsAtPath:Home];
    //判断文件是不是可读
    [manager isReadableFileAtPath:Home];
    //判断文件是不是可写
    [manager isWritableFileAtPath:Home];
    //判断文件是不是可执行
    [manager isExecutableFileAtPath:Home];
    //判断文件是否可删除
    [manager isDeletableFileAtPath:Home];
    //返回C的字符串
    [manager fileSystemRepresentationWithPath:Home];
    //返回当前编辑器路径
    [manager currentDirectoryPath];
    
    
    
    //获取所有文件属性
    NSLog(@"%@",[manager attributesOfItemAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"] error:nil]);
    
    //获取系统相关属性
    NSLog(@"%@",[manager attributesOfFileSystemForPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"] error:nil]);
    //获取最后的名称
    NSLog(@"%@",[manager displayNameAtPath:[NSHomeDirectory() stringByAppendingString:@"/Documents"]]);
    
    //不知道
    NSLog(@"%@",[manager componentsToDisplayForPath:[NSHomeDirectory() stringByAppendingString:@"/Documents/Test"]]);
    
    NSError *attrError;
    
    //设置文件属性
    [manager setAttributes:[NSDictionary dictionaryWithObject:NSFileTypeDirectory forKey:NSFileType] ofItemAtPath:target error:&attrError];

    /*具备有写入文件的对象有NSArray,NSString,NSData,NSDictionary*/
    
    //具备有写入文件权限
    NSString* Home = [NSHomeDirectory() stringByAppendingString:@"/Documents/temp.plist"];
    
    NSError *error;
    //atomically true 如果文件复写失败 不会覆盖原来文件
    [@"哈哈" writeToFile:Home atomically:true encoding:NSUTF8StringEncoding error:&error];
    
    //将数组写入文件 数组只能写如下对象[NSString,NSArray,NSData,NSDate,NSArray,NSDictionary];
    NSArray *temp = [NSArray arrayWithObjects:@"张三",@"李四",@"往往", nil];
    [temp writeToFile:Home atomically:true];
    
    //NSData写入文件
    NSData *data = [NSData dataWithData:[@"张三数据" dataUsingEncoding:NSUTF8StringEncoding]];
    //[data writeToFile:Home atomically:true];
    
    
    //通过对象读取数据
    NSArray *array1 = [[NSArray alloc] initWithContentsOfFile:Home];
    //通过类方法读取数据
    NSArray *array2 = [NSArray arrayWithContentsOfFile:Home];