NSString *home = NSHomeDirectory();
NSString *documents = [home stringByAppendingPathComponent:@"Documents"]; // 不建議采用,因為新版本的操作系統(tǒng)可能會修改目錄名

// NSUserDomainMask 代表從用戶文件夾下找
// YES 代表展開路徑中的波浪字符“~”
NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, NO); // 在iOS中,只有一個目錄跟傳入的參數(shù)匹配,所以這個集合里面只有一個元素

 

NSString *documents = [array objectAtIndex:0];

tmp:NSString *tmp = NSTemporaryDirectory();

#import "NJViewController.h"
#import "NJPerson.h"

 

@interface NJViewController ()
- (IBAction)saveDataBtnClick:(id)sender;
- (IBAction)readDataBtnClick:(id)sender;

@end

@implementation NJViewController
/**
 *   點擊保存按鈕
 */
- (IBAction)saveDataBtnClick:(id)sender {
    
    // youtube做法
//    NSString *path = @"/Users/apple/Library/Application Support/iPhone Simulator/7.1/Applications/A6D53E11-DDF0-4392-B2D4-FE77A96888A6/Documents/abc.plist";
    
    // 獲取應(yīng)用程序根目錄
    NSString *home = NSHomeDirectory();
    
    // 不建議寫/
    //NSString *path = [home stringByAppendingString:@"/Documents"];
    // 不建議Documents寫死
    //NSString *path = [home stringByAppendingPathComponent:@"Documents"];
    
    // NSUserDomainMask 在用戶目錄下查找
    // YES 代表用戶目錄的~
    // NSDocumentDirectory 查找Documents文件夾
    // 建議使用如下方法動態(tài)獲取
    NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    // 拼接文件路徑
    NSString *path = [doc stringByAppendingPathComponent:@"abc.plist"];
    NSLog(@"%@", path);
    
    
    //NSArray *arr = @[@"lnj", @"28"];
    //[arr writeToFile:path atomically:YES];
    
    // NSDictionary *dict = @{@"name": @"lnj", @"age":@"28"};
    // 調(diào)用writeToFile將數(shù)據(jù)寫入文件
    // [dict writeToFile:path atomically:YES];
    
    /*
     plist只能存儲系統(tǒng)自帶的一些常規(guī)的類, 也就是有writeToFile方法的對象才可以使用plist保存數(shù)據(jù)
     字符串/字典/數(shù)據(jù)/NSNumber/NSData ...
     */
    
    // 自定義的對象不能保存到plist中
    NJPerson *p = [[NJPerson alloc] init];
    p.name =@"lnj";
    
    NSDictionary *dict = @{@"person": @"abc"};
    [dict writeToFile:path atomically:YES];
}
/**
 *   點擊讀取按鈕
 */
- (IBAction)readDataBtnClick:(id)sender {
    NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    
    NSString *path = [doc stringByAppendingPathComponent:@"abc.plist"]
    ;
    // 讀取數(shù)據(jù)
    NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:path];
    NSLog(@"%@", dict);
}
@end

//
//  YYViewController.m
//  02-歸檔
//
//  Created by apple on 14-6-7.
//  Copyright (c) 2014年 itcase. All rights reserved.
//

 

#import "YYViewController.h"
#import "YYPerson.h"

@interface YYViewController ()
- (IBAction)saveBtnOnclick:(id)sender;
- (IBAction)readBtnOnclick:(id)sender;

@end

@implementation YYViewController

 

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (IBAction)saveBtnOnclick:(id)sender {
    //1.創(chuàng)建對象
    YYPerson *p=[[YYPerson alloc]init];
    p.name=@"文頂頂";
    p.age=23;
    p.height=1.7;
    
    //2.獲取文件路徑
    NSString *docPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
    NSString *path=[docPath stringByAppendingPathComponent:@"person.yangyang"];
    NSLog(@"path=%@",path);
    
    //3.將自定義的對象保存到文件中
    [NSKeyedArchiver archiveRootObject:p toFile:path];
    
}

- (IBAction)readBtnOnclick:(id)sender {
    //1.獲取文件路徑
    NSString *docPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
    NSString *path=[docPath stringByAppendingPathComponent:@"person.yangyang"];
    NSLog(@"path=%@",path);
    
    //2.從文件中讀取對象
    YYPerson *p=[NSKeyedUnarchiver unarchiveObjectWithFile:path];
    NSLog(@"%@,%d,%.1f",p.name,p.age,p.height);
}
@end

//
//  YYPerson.h
//  02-歸檔
//
//  Created by apple on 14-6-7.
//  Copyright (c) 2014年 itcase. All rights reserved.
//

 

#import <Foundation/Foundation.h>

// 如果想將一個自定義對象保存到文件中必須實現(xiàn)NSCoding協(xié)議
@interface YYPerson : NSObject<NSCoding>

//姓名
@property(nonatomic,copy)NSString *name;
//年齡
@property(nonatomic,assign)int age;
//身高
@property(nonatomic,assign)double height;
@end

//
//  YYPerson.m
//  02-歸檔
//
//  Created by apple on 14-6-7.
//  Copyright (c) 2014年 itcase. All rights reserved.
//

 

#import "YYPerson.h"

@implementation YYPerson

// 當將一個自定義對象保存到文件的時候就會調(diào)用該方法
// 在該方法中說明如何存儲自定義對象的屬性
// 也就說在該方法中說清楚存儲自定義對象的哪些屬性
-(void)encodeWithCoder:(NSCoder *)aCoder
{
    NSLog(@"調(diào)用了encodeWithCoder:方法");
    [aCoder encodeObject:self.name forKey:@"name"];
    [aCoder encodeInteger:self.age forKey:@"age"];
    [aCoder encodeDouble:self.height forKey:@"height"];
}

// 當從文件中讀取一個對象的時候就會調(diào)用該方法
// 在該方法中說明如何讀取保存在文件中的對象
// 也就是說在該方法中說清楚怎么讀取文件中的對象
-(id)initWithCoder:(NSCoder *)aDecoder
{
    NSLog(@"調(diào)用了initWithCoder:方法");
    //注意：在構(gòu)造方法中需要先初始化父類的方法
    if (self=[super init]) {
        self.name=[aDecoder decodeObjectForKey:@"name"];
        self.age=[aDecoder decodeIntegerForKey:@"age"];
        self.height=[aDecoder decodeDoubleForKey:@"height"];
    }
    return self;
}
@end

//
//  YYstudent.h
//  02-歸檔
//
//  Created by apple on 14-6-7.
//  Copyright (c) 2014年 itcase. All rights reserved.
//

 

#import "YYPerson.h"

@interface YYstudent : YYPerson
//增加一個體重屬性
@property(nonatomic,assign) double weight;
@end

//
//  YYstudent.m
//  02-歸檔
//
//  Created by apple on 14-6-7.
//  Copyright (c) 2014年 itcase. All rights reserved.
//

 

#import "YYstudent.h"

@implementation YYstudent

//在子類中重寫這兩個方法
- (void)encodeWithCoder:(NSCoder *)aCoder
{
    [super encodeWithCoder:aCoder];
    NSLog(@"調(diào)用了YYStudent encodeWithCoder");
    [aCoder encodeFloat:self.weight forKey:@"weight"];
}

- (id)initWithCoder:(NSCoder *)aDecoder
{
    if (self = [super initWithCoder:aDecoder]) {
        NSLog(@"調(diào)用了YYstudent initWithCoder");
        self.weight = [aDecoder decodeFloatForKey:@"weight"];
    }
    return self;
}
@end

//
//  YYViewController.m
//  02-歸檔
//
//  Created by apple on 14-6-7.
//  Copyright (c) 2014年 itcase. All rights reserved.
//

 

#import "YYViewController.h"
#import "YYPerson.h"
#import "YYstudent.h"

@interface YYViewController ()
- (IBAction)saveBtnOnclick:(id)sender;
- (IBAction)readBtnOnclick:(id)sender;

@end

@implementation YYViewController

 

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (IBAction)saveBtnOnclick:(id)sender {
    //1.創(chuàng)建對象
//    YYPerson *p=[[YYPerson alloc]init];
//    p.name=@"文頂頂";
//    p.age=23;
//    p.height=1.7;
    
    YYstudent *s=[[YYstudent alloc]init];
    s.name=@"wendingding";
    s.age=23;
    s.height=1.7;
    s.weight=62;
    //2.獲取文件路徑
    NSString *docPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
    NSString *path=[docPath stringByAppendingPathComponent:@"person.yangyang"];
    NSLog(@"path=%@",path);
    
    //3.將自定義的對象保存到文件中
//    [NSKeyedArchiver archiveRootObject:p toFile:path];
     [NSKeyedArchiver archiveRootObject:s toFile:path];
    
}

- (IBAction)readBtnOnclick:(id)sender {
    //1.獲取文件路徑
    NSString *docPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
    NSString *path=[docPath stringByAppendingPathComponent:@"person.yangyang"];
    NSLog(@"path=%@",path);
    
    //2.從文件中讀取對象
//    YYPerson *p=[NSKeyedUnarchiver unarchiveObjectWithFile:path];
//    NSLog(@"%@,%d,%.1f",p.name,p.age,p.height);
    YYstudent *s=[NSKeyedUnarchiver unarchiveObjectWithFile:path];
    NSLog(@"%@,%d,%.1f,%f",s.name,s.age,s.height,s.weight);
}
@end

//1.創(chuàng)建對象
    YYstudent *s=[[YYstudent alloc]init];
    s.name=@"wendingding";
    s.age=23;
    s.height=1.7;
    s.weight=62;
    
    //2.獲取文件路徑
    NSString *docPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
    NSString *path=[docPath stringByAppendingPathComponent:@"person.yangyang"];
    NSLog(@"path=%@",path);
    
    //3.將自定義的對象保存到文件中
     [NSKeyedArchiver archiveRootObject:s toFile:path];

//1.獲取文件路徑
    NSString *docPath=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];
    NSString *path=[docPath stringByAppendingPathComponent:@"person.yangyang"];
    //2.從文件中讀取對象
    YYstudent *s=[NSKeyedUnarchiver unarchiveObjectWithFile:path];