归档解档

AppDelegate.m

//    NSUserDefaults * userDefault = [NSUserDefaults standardUserDefaults];
    //获取内容
//    BOOL result = [[userDefault objectForKey:@"isLogin"] boolValue];
//    if (result) {
//        NSLog(@"用户已经登录");
//    }
   
   MyTabBarController* myTabBarVC = [[MyTabBarControlleralloc]init];
    self.window.rootViewController= myTabBarVC;
    [myTabBarVC release];

MyTabBarController.m

- (id)initWithNibName:(NSString*)nibNameOrNil bundle:(NSBundle*)nibBundleOrNil
{
    self= [superinitWithNibName:nibNameOrNilbundle:nibBundleOrNil];
    if(self) {
        // Custom initialization
        [selfloadViewControllers];
    }
    returnself;
}

- (void)loadViewControllers
{
    SandBoxViewController* sandBoxVC = [[SandBoxViewControlleralloc]init];
    UINavigationController* nav1 = [[UINavigationControlleralloc]initWithRootViewController:sandBoxVC];
    sandBoxVC.title= @"SandBox";
    [sandBoxVC release];
   
    WriteReadViewController* writeReadVC = [[WriteReadViewControlleralloc]init];
    UINavigationController* nav2 = [[UINavigationControlleralloc]initWithRootViewController:writeReadVC];
    writeReadVC.title= @"W & R";
    [writeReadVC release];
   
    PlistViewController* plistVC = [[PlistViewControlleralloc]init];
    UINavigationController* nav3 = [[UINavigationControlleralloc]initWithRootViewController:plistVC];
    plistVC.title= @"Plist";
    [plistVC release];
   
    AchiverViewController* achiverVC = [[AchiverViewControlleralloc]init];
    UINavigationController* nav4 = [[UINavigationControlleralloc]initWithRootViewController:achiverVC];
    achiverVC.title= @"Achiver";
    [achiverVC release];
   
    UnachiverViewController* unachiverVC = [[UnachiverViewControlleralloc]init];
    UINavigationController* nav5 = [[UINavigationControlleralloc]initWithRootViewController:unachiverVC];
    unachiverVC.title= @"UnAchiver";
    [unachiverVC release];
   
   
    self.viewControllers= @[nav1, nav2, nav3, nav4, nav5];
    [nav1 release];
    [nav2 release];
    [nav3 release];
    [nav4 release];
    [nav5 release];
}

- (void)viewDidLoad
{
    [superviewDidLoad];
    // Do any additional setup after loading the view.
    self.tabBar.translucent= NO;
   
}

SandBoxViewController.m

- (void)viewDidLoad
{
    [superviewDidLoad];
    // Do any additional setup after loading the view.
   
    //获得沙盒路径
    NSString* sandBoxPath = NSHomeDirectory();
    NSLog(@"%@", sandBoxPath);
   
    //获得temp文件夹路径
    NSString* tempPath = NSTemporaryDirectory();
    NSLog(@"tempPath-----%@", tempPath);
   
    //重要___
    //获得Documents文件夹路径
    //要用NSDocumentDirectory
    NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    NSLog(@"documentsPath-----%@", documentsPath);
   
    //重要___
    NSString* cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    NSLog(@"cachesPath-----%@", cachesPath);
   
    //获得Library文件夹路径,使用NSLibraryDirectory
    NSString* libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    NSLog(@"libraryPath------%@", libraryPath);

    //获取应用程序中的文件路径
    //应用程序包里面的文件是只读的,不能写入
    NSString* resourcePath = [[NSBundlemainBundle]pathForResource:@"33"ofType:@"jpg"];
    NSLog(@"resourcePath-----%@", resourcePath);
   
    //原始路径
    NSString* originPath = [documentsPathstringByAppendingPathComponent:@"test.txt"];
    //目的路径
    NSString* toPath = [tempPath stringByAppendingPathComponent:@"test.txt"];
    NSFileManager* fileManager = [NSFileManagerdefaultManager];
//    NSError * error = nil;
    //从一个位置移动到另一个位置
//    [fileManager moveItemAtPath:originPath toPath:toPath error:&error];
 //   NSLog(@"error = %@", error);
   
    NSString* testArrayFilePath = [documentsPathstringByAppendingPathComponent:@"test.txt"];
//    if ([fileManager fileExistsAtPath:testArrayFilePath]) {
//        NSLog(@"存在");
//        //删除文件
//        [fileManager removeItemAtPath:testArrayFilePath error:nil];
//    }
   
    //拷贝文件
    if([fileManager fileExistsAtPath:testArrayFilePath]) {
        [fileManager copyItemAtPath:originPathtoPath:toPatherror:nil];

    }
   
   
    NSString* filesPath = [documentsPathstringByAppendingPathComponent:@"Files"];
    //创建文件夹Files
    [fileManager createDirectoryAtPath:filesPathwithIntermediateDirectories:YESattributes:nilerror:nil];
   
}

WriteReadViewController.m

- (void)viewDidLoad
{
    [superviewDidLoad];
    // Do any additional setup after loading the view.
   
    UITextField* textField = [[UITextFieldalloc]initWithFrame:CGRectMake(20, 80, 280, 30)];
    textField.borderStyle= UITextBorderStyleRoundedRect;
    textField.backgroundColor= [UIColoryellowColor];
    textField.tag= 100;
    [self.viewaddSubview:textField];
    [textField release];
   
    UIButton* writeButton = [UIButtonbuttonWithType:UIButtonTypeSystem];
    writeButton.frame= CGRectMake(20, 150, 100, 30);
    [writeButton addTarget:selfaction:@selector(dowrite:)forControlEvents:UIControlEventTouchUpInside];
    [writeButton setTitle:@"写入"forState:UIControlStateNormal];
    writeButton.backgroundColor= [UIColorcyanColor];
    [self.viewaddSubview:writeButton];
   
    UIButton* readButton = [UIButtonbuttonWithType:UIButtonTypeSystem];
    readButton.frame= CGRectMake(180, 150, 100, 30);
    [readButton addTarget:selfaction:@selector(doread:)forControlEvents:UIControlEventTouchUpInside];
    [readButton setTitle:@"读取"forState:UIControlStateNormal];
    readButton.backgroundColor= [UIColorcyanColor];
    [self.viewaddSubview:readButton];
   
   
   
}
//IOS中基本的文件读写
//IOS中支持NSString,NSArray,NSDictionary,NSData 4种数据类型,可以直接写入到磁盘,对于数组和字典,要想写入磁盘,里面存储的数据也只能是这4种数据类型
//写入
- (void)dowrite:(UIButton*)btn
{
    //取出textfield中输入的信息
    UITextField* tf = (UITextField*)[self.viewviewWithTag:100];
   
    //字符串写入磁盘,第一个参数是文件路径,第二个参数YES是保证多线程写入下安全,第三个参数是编码格式,通常UTF8编码,第四个参数是如果写入失败,捕获信息
    [tf.textwriteToFile:[selffilePath]atomically:YESencoding:NSUTF8StringEncodingerror:nil];
   
    //存储数组
//    NSString * documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
//    NSString * filePath = [documentsPath stringByAppendingPathComponent:@"testarray"];
//    NSArray * array = [NSArray arrayWithObjects:@"111", @"222", nil];
//    [array writeToFile:filePath atomically:YES];
   
}

//读取
- (void)doread:(UIButton*)btn
{
    UITextField* tf = (UITextField*)[self.viewviewWithTag:100];
   
//    NSString * string = [NSString stringWithContentsOfFile:[self filePath] encoding:NSUTF8StringEncoding error:nil];
//    tf.text = string;
    NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    NSString* filePath = [documentsPathstringByAppendingPathComponent:@"testarray"];
    NSArray* array = [NSArrayarrayWithContentsOfFile:filePath];
    tf.text= [array firstObject];
   
   
   
}

- (NSString*)filePath
{
    NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    NSString* filePath = [documentsPathstringByAppendingPathComponent:@"test.txt"];
    returnfilePath;

}

PlistViewController.m

- (void)viewDidLoad
{
    [superviewDidLoad];
    // Do any additional setup after loading the view.
   
    NSString* filePath = [[NSBundlemainBundle]pathForResource:@"Data"ofType:@"plist"];
    NSDictionary* dic = [NSDictionarydictionaryWithContentsOfFile:filePath];
    NSLog(@"+++++++%@", dic);
   
    //把内存中的字典或数组写入磁盘,保存成plist文件
    //plist能够存储的数据类型有7种
    //NSString NSArray NSDictionary NSDate NSData NSNumber BOOL
    NSDictionary* dic1 = @{@"name":@"zhanger",@"age": @18,@"isstudent": @YES};
    //保存成plist文件
 //   NSString * writePath = [[self documentsPath] stringByAppendingString:@"/TestDic.plist"];
    NSString* writePath = [[selfdocumentsPath]stringByAppendingPathComponent:@"TestDic.plist"];
    [dic1 writeToFile:writePathatomically:YES];
  
    //NSUserDefaults系统提供了一个快速持久化的类,用于保存一些用户的偏好设置信息
    NSUserDefaults* userDefaults = [NSUserDefaultsstandardUserDefaults];
   
    [userDefaults  setObject:[NSNumbernumberWithBool:YES]forKey:@"isLogin"];
    //保存到磁盘,如果没有这行代码,数据只会在退入后台或彻底关闭时才写入磁盘
    [userDefaults synchronize];
}

- (NSString*)documentsPath
{
     NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    returndocumentsPath;
}

AchiverViewController.m

- (void)viewDidLoad
{
    [superviewDidLoad];
    // Do any additional setup after loading the view.
   
    UITextField* nameTextField = [[UITextFieldalloc]initWithFrame:CGRectMake(20, 80, 280, 30)];
    nameTextField.borderStyle= UITextBorderStyleRoundedRect;
    nameTextField.placeholder= @"name";
    nameTextField.tag= 100;
    [self.viewaddSubview:nameTextField];
    [nameTextField release];
   
    UITextField* sexTextField = [[UITextFieldalloc]initWithFrame:CGRectMake(20, 130, 280, 30)];
    sexTextField.borderStyle= UITextBorderStyleRoundedRect;
    sexTextField.placeholder= @"sex";
    sexTextField.tag= 101;
    [self.viewaddSubview:sexTextField];
    [sexTextField release];
   
    UITextField* ageTextField = [[UITextFieldalloc]initWithFrame:CGRectMake(20, 180, 280, 30)];
    ageTextField.borderStyle= UITextBorderStyleRoundedRect;
    ageTextField.placeholder= @"age";
    ageTextField.tag= 102;
    [self.viewaddSubview:ageTextField];
    [ageTextField release];
   
    UIButton* achiverButton = [UIButtonbuttonWithType:UIButtonTypeSystem];
    achiverButton.frame= CGRectMake(20, 230, 280, 30);
    [achiverButton addTarget:selfaction:@selector(doAchiver:)forControlEvents:UIControlEventTouchUpInside];
    [achiverButton setTitle:@"归档"forState:UIControlStateNormal];
    achiverButton.backgroundColor= [UIColorcyanColor];
    [self.viewaddSubview:achiverButton];
   
}

- (void)doAchiver:(UIButton*)btn
{
    UITextField* nameTf = (UITextField*)[self.viewviewWithTag:100];
     UITextField* sexTf = (UITextField*)[self.viewviewWithTag:101];
     UITextField* ageTf = (UITextField*)[self.viewviewWithTag:102];
   
    Person* person = [[Personalloc]init];
    person.name= nameTf.text;
    person.sex= sexTf.text;
    person.age= [ageTf.textintegerValue];
   
    //创建一个容器data
    NSMutableData* data = [NSMutableDatadata];
    //创建一个归档器
    NSKeyedArchiver* achiver = [[NSKeyedArchiveralloc]initForWritingWithMutableData:data];
    [achiver encodeObject:personforKey:@"Person"];
    [achiver finishEncoding];
   
    NSString* personFilePath = [[selfdocumentsPath]stringByAppendingPathComponent:@"PersonDataFile"];
    //把data写入磁盘
    [data writeToFile:personFilePathatomically:YES];
   
}

- (NSString*)documentsPath
{
    NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    returndocumentsPath;
}

UnachiverViewController.m

- (void)viewDidLoad
{
    [superviewDidLoad];
    // Do any additional setup after loading the view.
   
    UILabel* aLabel = [[UILabelalloc]initWithFrame:CGRectMake(20, 80, 280, 100)];
    aLabel.backgroundColor= [UIColorcyanColor];
    aLabel.numberOfLines= 0;
    aLabel.tag= 100;
    [self.viewaddSubview:aLabel];
    [aLabel release];
       
    UIButton* unAchiverButton = [UIButtonbuttonWithType:UIButtonTypeSystem];
    unAchiverButton.frame= CGRectMake(20, 230, 280, 30);
    [unAchiverButton addTarget:selfaction:@selector(doUnAchiver:)forControlEvents:UIControlEventTouchUpInside];
    [unAchiverButton setTitle:@"解档"forState:UIControlStateNormal];
    unAchiverButton.backgroundColor= [UIColorredColor];
    [self.viewaddSubview:unAchiverButton];

   
}

- (void)doUnAchiver:(UIButton*)btn
{
    NSString* personFilePath = [[selfdocumentsPath]stringByAppendingPathComponent:@"PersonDataFile"];
   
    //从文件中读出personData
    NSData* personData = [NSDatadataWithContentsOfFile:personFilePath];
   
    //创建一个解档器
    NSKeyedUnarchiver* unarchiver = [[NSKeyedUnarchiveralloc]initForReadingWithData:personData];
    //从data中解码出一个person对象
    Person* p = [unarchiver decodeObjectForKey:@"Person"];
    UILabel* label = (UILabel*)[self.viewviewWithTag:100];
    label.text= [NSStringstringWithFormat:@"name = %@, sex = %@, age = %ld", p.name, p.sex, (long)p.age];
   

}

- (NSString*)documentsPath
{
    NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0];
    returndocumentsPath;
}

Person.h

#import<Foundation/Foundation.h>

//1.要归档的类必须要接受NSCoding协议
//2.类中的实例变量的类型也必须是接受NSCoding协议

@interfacePerson : NSObject<NSCoding]] >

@property(nonatomic,retain)NSString* name;

@property(nonatomic,retain)NSString* sex;

@property(nonatomic,assign)NSIntegerage;

@end

Person.m

#import"Person.h"
#define NAME_KEY @"name"
#define SEX_KEY @"sex"
#define AGE_KEY @"age"

@implementationPerson

//编码的过程其实就是对所有的实例变量转成二进制数据
- (void)encodeWithCoder:(NSCoder*)aCoder
{
    [aCoder encodeObject:self.nameforKey:NAME_KEY];
    [aCoder encodeObject:self.sexforKey:SEX_KEY];
    [aCoder encodeInteger:self.ageforKey:AGE_KEY];
}

//解码的过程就是把data中的二进制信息转成想要的数据,并赋值给实例变量
- (id)initWithCoder:(NSCoder*)aDecoder
{
    self= [superinit];
    if(self) {
       
        self.name= [aDecoder decodeObjectForKey:NAME_KEY];
        self.sex= [aDecoder decodeObjectForKey:SEX_KEY];
        self.age= [aDecoder decodeIntegerForKey:AGE_KEY];
       
    }
    returnself;
}


- (void)dealloc
{
    self.name= nil;
    self.sex= nil;
    [superdealloc];
}