iOS文件和文件夹的创建,删除,移动, 拷贝,是否存在及简单数据类型的读写

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    // 沙盒(SandBox)
    // Documents(文件文档, 用户主动数据存储)
    // Libray(资源, 一般用来存放, 程序员要存储的一些数据)
    //     ⬇️
    //   Cache (缓存文件)
    //   Perferences (用户信息和一些用户设置, NSUserDefaults)
    // tmp(临时目录, 下载的临时文件一般放这里)

    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"isLogin"];
    [[NSUserDefaults standardUserDefaults] synchronize];

    // 2. 获取沙盒路径
    // 下面是两个快捷获取到目录的 C 语言的函数
    // 根目录 家目录
    NSHomeDirectory();
    NSLog(@"Home------%@", NSHomeDirectory());
    // 临时目录 tmp 目录
    NSTemporaryDirectory();
    NSLog(@"Temporary-----%@", NSTemporaryDirectory());

    //  C 函数
    //  参数1: 搜索文件夹路径 NSSearchPathDirectory
    //  常用: NSDocumentDirectory NSLibraryDirectory NSCachesDirectory
    //  参数2: 在用户作用域下搜索
    //  参数3: YES or NO YES代表绝对路径(基本上用绝对路径), NO代表相对路径(~)
    NSArray *pathArray =  NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSLog(@"%@", pathArray);
    [pathArray firstObject];

    // NSBundle  .app文件包
    NSLog(@"%@", [NSBundle mainBundle]);

    // 1> 简单的文件读写 Input Output
    NSString *hello = @"Hello, I/O";
    // 一般拼接路径时, 使用 stringByAppendingPathComponent 会自动加斜杠
    NSString *writePath = [[pathArray firstObject] stringByAppendingPathComponent:@"hello.txt"];
    NSError *error = nil;
    [hello writeToFile:writePath atomically:YES encoding:NSUTF8StringEncoding error:&error];
    if (error) {
        NSLog(@"存储失败");
    } else {
        NSLog(@"存储成功");
    }

    // 2> 读取路径对应的文字
    NSError *readError = nil;
    NSString *readString = [NSString stringWithContentsOfFile:writePath encoding:NSUTF8StringEncoding error:&readError];
    NSLog(@"%@", readString);

    // 3> 将 数组 写入本地文件
    NSArray *array = @[@"黄航", @"韩旭", @"爆花", @"宝宝"];
    NSString *arrayPath = [[pathArray firstObject] stringByAppendingPathComponent:@"name.plist"];
    BOOL isArrayWriteSuccess = [array writeToFile:arrayPath atomically:YES];
    if (isArrayWriteSuccess) {
        NSLog(@"写入成功");
    } else {
        NSLog(@"写入失败");
    }

    // 4> 将 数组 读取
    NSArray *nameArray = [NSArray arrayWithContentsOfFile:arrayPath];
    NSLog(@"%@", nameArray);

    // 5> 将 字典 写入本地
    NSDictionary *dict = @{@"name":@"mafeng",
                           @"age":@"",
                           @"sex":@"man"};
    NSString *dictPath = [[pathArray firstObject] stringByAppendingPathComponent:@"mafeng.plist"];
    BOOL isDictWriteSuccess = [dict writeToFile:dictPath atomically:YES];
    if (isDictWriteSuccess) {
        NSLog(@"写入成功");
    } else {
        NSLog(@"写入失败");
    }

    // 6> 将字典读取出来
    NSDictionary *dic = [NSDictionary dictionaryWithContentsOfFile:dictPath];
    NSLog(@"%@", dic);

    // 7> 将Data类型写入本地
    UIImage *image = [UIImage imageNamed:@"user"];

    NSString *dataPath = [[pathArray firstObject] stringByAppendingPathComponent:@"imageData"];
    NSData *imageData = UIImageJPEGRepresentation(image, 0.1);

    BOOL isDataWriteSuccess = [imageData writeToFile:dataPath atomically:YES];
    NSLog(@"%@", imageData);
    if (isDataWriteSuccess) {
        NSLog(@"写入成功");
    } else {
        NSLog(@"写入失败");
    }

    NSData *imageNewData = [NSData dataWithContentsOfFile:dataPath];
    UIImage *fileImage = [UIImage imageWithData:imageNewData];

    // 2. 复杂对象文件读写, 自定义类型
    // 归档/反归档, 序列化/反序列化

    // 1> 归档, 将 对象 存储到本地
    Book *book = [Book new];
    book.bookName = @"放弃iOS从我做起";
    book.bookType = @"教育";
    book.bookPrice = @"988.5";
    book.bookAuthor = @"晃晃";
    book.bookAddress = @"演变大学";

    NSString *bookPath = [[pathArray firstObject] stringByAppendingPathComponent:@"book.plist"];
    BOOL isSuccess = [NSKeyedArchiver archiveRootObject:book toFile:bookPath];
    if (isSuccess) {
        NSLog(@"写入成功");
    }

    // 2> 反归档
    Book *huangBook = [NSKeyedUnarchiver unarchiveObjectWithFile:bookPath];
    NSLog(@"%@", huangBook.bookName);

    // 如果对象想要实现归档和反归档
    // 1. 对象对应的类需要签订  Coding
    // 2. 实现写一方法
    //     1> initWithCoder  反归档用
    //     2> encodeWithCoder 归档用
    // 3. 归档时使用 KeyedArchiver
    // 4. 反归档时, 使用 KeyedUnarchiver

    // 创建一个文件管理器
    NSFileManager *manager = [NSFileManager defaultManager];
    NSString *filePath = [[pathArray firstObject] stringByAppendingPathComponent:@""];
    // 创建文件夹
    [manager createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:nil];
    // 文件是否存在
    BOOL isExists = [manager fileExistsAtPath:filePath];
    // 删除文件
    BOOL isDele = [manager removeItemAtPath:bookPath error:nil];
    if (isDele) {
        NSLog(@"删除成功");
    } else {
        NSLog(@"删除失败");
    }

    if (isExists) {
        NSLog(@"文件夹存在");
        // 拷贝文件
        NSString *copyPath = [filePath stringByAppendingPathComponent:@"dict.plist"];;
        BOOL isCopy = [manager copyItemAtPath:dictPath toPath:copyPath error:nil];
        if (isCopy) {
            NSLog(@"拷贝成功");
        } else {
            NSLog(@"拷贝失败");
        }
        // 移动文件
        NSString *movePath = [filePath stringByAppendingPathComponent:@"mov.plist"];;
        BOOL isMove = [manager moveItemAtPath:dictPath toPath:movePath error:nil];
        if (isMove) {
            NSLog(@"移动成功");
        } else {
            NSLog(@"移动失败");
        }

    } else {
        NSLog(@"文件夹不存在");
    }

    return YES;
}