MAC下基于Object-C的常用文件操作

1.获取沙盒路径

  调用方式  [self  getHomePath];

-(NSString *)getHomePath//自定义函数名，返回字符串
{
    NSString *homePath =NSHomeDirectory();//系统函数
    NSLog(@"homePath = %@",homePath);
    return homePath;
}

2.获取documents路径

//获取documents路径
-(NSString *)getDocumentPath
{
    //第一个参数指定了搜索的路径名称
    //第二个参数限定了在沙盒内部
    
    NSArray *docPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [docPaths lastObject];
    NSLog(@"documentsPath = %@",documentsPath);
    return documentsPath;
}

 3.获取library路径

//获取Library路径
-(NSString *)getLibraryPath
{
    //第一个参数指定了搜索的路径名称
    //第二个参数限定了在沙盒内部
    
    NSArray *libPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
    NSString *libraryPath = [libPaths lastObject];
    NSLog(@"libraryPath = %@",libraryPath);
    return libraryPath;
}

3.获取Tmp路径

//获取tmp文件夹路径
-(NSString *)getTmpPath
{
    NSString *tmpPath = NSTemporaryDirectory();
    NSLog(@"tmpPath = %@",tmpPath);
    return tmpPath;
}

4.获取路径的各个组成部分

//获取路径的各个组成部分
-(void)parsePath
{
    NSString *path = @"/Users/zero.jin/Library/";//待分割目标路径
    NSArray *pathArray = [path pathComponents];
    NSLog(@"pathComponents = %@",pathArray);

    //提取路径的最后一个组成成分即文件名
    NSString *name = [path lastPathComponent];
    //提取文件的路径
    NSString *filePath = [path stringByDeletingLastPathComponent];
    //追加文件名
    NSString *addStr = [path stringByAppendingPathComponent:@"haha.txt"]
}

5.各种数据之间的转换

//数据之间的转换，NSData表示二进制数据，示例在于形，不纠结于具体的参数
-（void）dataChange:(NSData *)data
{
    //NSData -> NSString
    NSString *aString = [[NSString alloc] initWithData:data encoding:(NSUTF8StringEncoding)];
    //NSString ->NSData
    NSData *aData = [aString dataUsingEncoding:NSUTF8StringEncoding];
    //NSData ->UIImage
    UIImage *image = [UIImage imageWithData:aData];
    //UIImage ->NSData
    NSData *imageData = UIImagePNGRepresentation(image);
}

6.创建文件夹

//创建文件夹
-(void)createFolder
{
    NSString *docPath = [self getDocumentPath];
    NSString *testPath = [docPath stringByAppendingPathComponent:@"myFolder"];
    NSFileManager *manager = [NSFileManager defaultManager];
    //withIntermediateDirectories  YES代表覆盖原文件，NO表示不覆盖
    BOOL ret = [manager createDirectoryAtPath:testPath withIntermediateDirectories:(YES) attributes:nil
                                        error:nil];
    
}