NSFileManager的使用

- (void)viewDidLoad {
    [super viewDidLoad];


    NSFileManager *fileManager = [NSFileManager defaultManager];
#pragma mark - 目录的操作
//    目录
   NSArray *fileArr = [fileManager contentsOfDirectoryAtPath:@"/Users/jessy/Desktop/tab" error:nil];
    NSLog(@"%@",fileArr);
    for (NSString *detail in fileArr) {
        NSLog(@"detail---%@",detail);
    }

//    详细到每个子目录，，
   NSArray *subArr = [fileManager subpathsOfDirectoryAtPath:@"/Users/jessy/Desktop/tab" error:nil];
    NSLog(@"%@",subArr);
    for (NSString *subDetail in subArr) {
        NSLog(@"subDetail---%@",subDetail);
    }

//    创建目录
    BOOL createDir = [fileManager createDirectoryAtPath:@"/Users/jessy/Desktop/tab/23/12" withIntermediateDirectories:YES attributes:nil error:nil];
    [self judgeName:createDir];

#pragma mark - 文件的操作

//   文件的创建与写入
    NSString *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
    NSString *filePath = [path stringByAppendingPathComponent:@"fileTest.txt"];
    NSString *message = @"ceshia";
    if (![fileManager fileExistsAtPath:filePath]) {
        BOOL createFile = [fileManager createFileAtPath:filePath contents:[message dataUsingEncoding:NSUTF8StringEncoding ] attributes:nil];
        [self judgeName:createFile];
    }


//    读取文件的内容
    NSData *fileData = [fileManager contentsAtPath:filePath];
    NSString *fileStr = [[NSString alloc]initWithData:fileData encoding:NSUTF8StringEncoding];
    NSLog(@"%@",fileStr);

//    移动文件
    NSString *cachePath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES).firstObject;
    NSString *newPath = [cachePath stringByAppendingPathComponent:@"fileTest.txt"];
    if (![fileManager fileExistsAtPath:newPath]) {
        BOOL movePath = [fileManager moveItemAtPath:filePath toPath:newPath error:nil];
        [self judgeName:movePath];
    }


//    复制文件
    if (![fileManager fileExistsAtPath:filePath]) {
        BOOL copyFile = [fileManager copyItemAtPath:newPath toPath:filePath error:nil];
        [self judgeName:copyFile];
    }

//    比较两个文件的内容
   BOOL result = [fileManager contentsEqualAtPath:newPath andPath:filePath];
    if (result) {
        NSLog(@"一样");
    }else
    {
        NSLog(@"NO");
    }

//    删除文件
   BOOL removeFile = [fileManager removeItemAtPath:filePath error:nil];
    [self judgeName:removeFile];


}


- (void)judgeName:(BOOL)name{
    if (name) {
        NSLog(@"成功");
    }else{
        NSLog(@"失败");
    }
}