objective-c之偏好设置，数组，字典，对象的存储(归档反归档)

一、用户偏好设置的存取：

1、写：

//偏好设置存储

NSUserDefaults * userDefauls = [NSUserDefaults standardUserDefaults];

//设置数据

[userDefauls setObject:@"Jack" forKey:@"name"];

[userDefauls setObject:@"11111111111" forKey:@"phone"];

[userDefauls setBool:YES forKey:@"isAutoLogin"];

//立即存储

[userDefauls synchronize];

2、读：

//读取偏好设置

NSUserDefaults * userDefaults = [NSUserDefaults standardUserDefaults];

//读取数据

NSString * name = [userDefaults objectForKey:@"name"];

NSString * phone = [userDefaults objectForKey:@"phone"];

BOOL isAuto = [userDefaults boolForKey:@"isAutoLogin"];

NSLog(@"%@---%@ --- %d",name,phone,isAuto);

二、数组的存储（NSDictionary 的存储类似）

1、写

//1.构建数据

NSArray * names = @[@"小明",@"AngleBaby",@"bob",@"Jack"];

//2.获取documents路径，存到主目录中

NSString * docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES) lastObject];

//3.拼接文件名

NSString * fileName = [docDir stringByAppendingPathComponent:@"names.txt"];

//4.存储

//参数2:是否原子型写入

[names writeToFile:fileName atomically:YES];

2、读

//获取documents路径

NSString * docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES) lastObject];

//拼接文件名

NSString * fileName = [docDir stringByAppendingPathComponent:@"names.txt"];

NSArray * names = [NSArray arrayWithContentsOfFile:fileName];

NSLog(@"%@",names);

三、字典的存储

1、写

//1.构建数据

    NSDictionary *person = @{

                        @"name":@"jack",

                        @"sex":@"male",

                        @"student":@[@"lemon",@"mega"]

                        };

    

    //2.获取documents路径

    NSString * docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

    

    //3.拼接文件名

    NSString * fileName = [docDir stringByAppendingPathComponent:@"teacher.plist"];

    

    //4.存储

    

    //参数2:是否原子型写入

    [person writeToFile:fileName atomically:YES];

    

    

    NSLog(@"%@",fileName);

2、读

//获取documents路径

    NSString * docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

    

    //拼接文件名

    NSString * fileName = [docDir stringByAppendingPathComponent:@"teacher.plist"];

    

    NSDictionary * teacher = [NSDictionary dictionaryWithContentsOfFile:fileName];

    

    NSLog(@"%@",teacher);

四、自定义对象的存储

1、写

//创建模型类的对象

HMContact * contact = [[HMContact alloc] init];

contact.name = @"JackMeng";

contact.phone = @"18610988888";

//获取documents文件夹

NSString * docuDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES) lastObject];

//拼接文件名

NSString * fileName= [docuDir stringByAppendingPathComponent:@"contact"];

//归档

[NSKeyedArchiver archiveRootObject:contact toFile:fileName];

2、读

//获取documents文件夹

NSString * docuDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES) lastObject];

//拼接文件名

NSString * fileName= [docuDir stringByAppendingPathComponent:@"contact"];

//反归档

HMContact * contact = [NSKeyedUnarchiver unarchiveObjectWithFile:fileName];

NSLog(@"%@ --- %@",contact.name,contact.phone);