- (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;
}
