/** NSUserDefaults */
    //  NSData届案、NSString、NSNumber罢艾、NSDate楣颠、NSArray、NSDictionar
    
    static NSString* const key = @"key";
    
    [[NSUserDefaults standardUserDefaults] setValue:@"key123" forKey:key];
    [[NSUserDefaults standardUserDefaults] setValue:@"" forKey:@"key2"];
    [[NSUserDefaults standardUserDefaults] setValue:@2 forKey:@"key3"];
    [[NSUserDefaults standardUserDefaults] setObject:@"" forKey:@"key4"];
    [[NSUserDefaults standardUserDefaults] setObject:nil forKey:@"key5"];
    [[NSUserDefaults standardUserDefaults] synchronize];
    
    NSString *string = [[NSUserDefaults standardUserDefaults] valueForKey:key];
    NSString *string2 = [[NSUserDefaults standardUserDefaults] valueForKey:@"key2"];
    NSNumber *number3 = [[NSUserDefaults standardUserDefaults] valueForKey:@"key3"];
    NSString *string4 = [[NSUserDefaults standardUserDefaults] objectForKey:@"key4"];
    NSString *string5 = [[NSUserDefaults standardUserDefaults] objectForKey:@"key5"];

/** 屬性列表plist */
 //序列化對象（serialized object）：指可以被轉(zhuǎn)換為字節(jié)流以便于存儲(chǔ)到文件中或通過網(wǎng)絡(luò)進(jìn)行傳輸?shù)膶ο?    /*
     可以被序列化的類型只有如下幾種：
     NSArray
     NSMutableArray
     NSDictionary
     NSMutableDictionary
     NSData
     NSMutableData
     NSString
     NSMutableString
     NSNumber
     NSDate
     */
    // 路徑
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentDirectory = paths.firstObject;
    NSString *path = [documentDirectory stringByAppendingPathComponent:@"data.plist"];
    
    // 桌面路徑
    NSString *desktopPath = @"/Users/xp/Desktop";
    desktopPath = [desktopPath stringByAppendingPathComponent:@"data1.plist"];
    
    // 存儲(chǔ)
    NSArray *array = @[@1,@2,@3,@4];
    [array writeToFile:desktopPath atomically:YES];
    
    // 讀取
    if ([[NSFileManager defaultManager]fileExistsAtPath:desktopPath]) {
        // 確認(rèn)路徑存在
        NSArray* arr = [[NSArray alloc]initWithContentsOfFile:desktopPath];
        NSLog(@"arr: %@",arr);
    }

/** NSKeyedArchiver 對象歸檔 */
    // 在Cocoa中咐蚯，Archiver是另一種形式的序列化童漩，是任何對象都可實(shí)現(xiàn)的更常規(guī)的類型
    // 只有遵守了NSCoding或 NSSecureCoding（更為安全的歸檔協(xié)議）協(xié)議,并且實(shí)現(xiàn)了協(xié)議里歸檔與解歸檔的方法的的類創(chuàng)建的對象才能夠進(jìn)行歸檔
    // 最好也實(shí)現(xiàn)以下NSCopying，NSCopying與NSCoding一起實(shí)現(xiàn)好處在于允許復(fù)制對象春锋，使用數(shù)據(jù)模型對象時(shí)有較大的靈活性
    // 桌面路徑
    NSString *desktopPath = @"/Users/xp/Desktop";
    desktopPath = [desktopPath stringByAppendingPathComponent:@"data1.plist"];
    
    // 存儲(chǔ)
    FourLines *lines = [[FourLines alloc] init];
    lines.lines = @[@1,@3,@5,@10];
    NSMutableData *data = [[NSMutableData alloc] init];
    NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
    [archiver encodeObject:lines forKey:@"kRootKey"];
    [archiver finishEncoding];
    
    [data writeToFile:desktopPath atomically:YES];
    
    // 讀取
    if ([[NSFileManager defaultManager]fileExistsAtPath:desktopPath]) {
        NSData *data = [[NSMutableData alloc]initWithContentsOfFile:desktopPath];
        NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc]initForReadingWithData:data];
        FourLines *four = [unarchiver decodeObjectForKey:@"kRootKey"];
        [unarchiver finishDecoding];
        for (int i = 0; i < 4; i++) {
            //to do
        }
    }

// 協(xié)議實(shí)現(xiàn)
#pragma mark - NSCoding
- (void)encodeWithCoder:(NSCoder *)aCoder {
    [aCoder encodeObject:self.lines forKey:klinesKey];
}

- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super init];
    if (self) {
        _lines = [aDecoder decodeObjectForKey:klinesKey];
    }
    return self;
}

#pragma mark - NSCopying
- (id)copyWithZone:(NSZone *)zone {
    FourLines *copy = [[[self class] allocWithZone:zone] init];
    NSMutableArray *linsCopy = [NSMutableArray array];
    for (id line in self.lines) {
        [linsCopy addObject:[line copyWithZone:zone]];
    }
    copy.lines = linsCopy;
    return copy;
}