- (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":@"23",                           @"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:@"10101"];    // 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;}