【IPHONE开发-OBJECTC入门学习】对象的归档和解归档

#import <Foundation/Foundation.h>
#import "Person.h"

int main(int argc, const char * argv[])
{

@autoreleasepool {

//-----------第1种归档方式---------

//1.使用NSKeyedArchiver 归档对象到文件(对象序列化,持久化)
NSArray* arrays = [[NSArray alloc]initWithObjects:@"111",@"222", nil];

NSString* userPath = NSHomeDirectoryForUser(@"3g2win");

NSLog(@"userPath=%@",userPath);

NSString* bakFilePath = [userPath stringByAppendingFormat:@"/test.txt"];

NSLog(@"bakFilePath=%@",bakFilePath);

NSLog(@"归档前的数组:\n\n%@",arrays);

//归档

if ([NSKeyedArchiver archiveRootObject:arrays toFile:bakFilePath]){
NSLog(@"归档成功...\n\n");
}else {
NSLog(@"归档失败...\n\n");
}

//2.使用NSKeyedUnarchiver 解归档文件到对象(反序列化)
//解归档
NSArray* srcArr =  [NSKeyedUnarchiver unarchiveObjectWithFile:bakFilePath];

NSLog(@"解归档后的数组:\n\n%@",srcArr);

//------------第2种归档方式---------

//归档
NSMutableData* data = [NSMutableData alloc];
NSKeyedArchiver* archiver = [NSKeyedArchiver alloc];
[archiver initForWritingWithMutableData:data];
[archiver encodeObject:@"张三" forKey:@"name"];
[archiver encodeInt:25 forKey:@"age"];
[archiver encodeFloat:5200.5F forKey:@"money"];
[archiver finishEncoding];
[data writeToFile:@"/Users/3g2win/11111111111.txt" atomically:YES];

//解归档
NSMutableData* data2 = [NSMutableData dataWithContentsOfFile:@"/Users/3g2win/11111111111.txt"];
NSKeyedUnarchiver* unArchiver = [NSKeyedUnarchiver alloc];
[unArchiver initForReadingWithData:data2];

NSLog(@"name=%@",[unArchiver decodeObjectForKey:@"name"]);

NSLog(@"age=%d",[unArchiver decodeIntForKey:@"age"]);

NSLog(@"money=%f",[unArchiver decodeFloatForKey:@"money"]);

//-------------自定义对象的归档和解归档------------
Person* zhao6 = [[Person alloc] initWithName:@"赵六" withAge:18];

[zhao6 display];

//归档
[NSKeyedArchiver archiveRootObject:zhao6 toFile:@"/Users/3g2win/zhao6.txt"];

//解档

Person* newZhao6 = [NSKeyedUnarchiver unarchiveObjectWithFile:@"/Users/3g2win/zhao6.txt"];

[newZhao6 display];

}
return 0;
}

#import <Foundation/Foundation.h>

//必须实现NSCoding协议才能够归档解归档自定义类

@interface Person : NSObject <NSCoding>

{
NSString* name;
int age;
}

@property (nonatomic,assign) NSString* name;
@property (nonatomic,assign) int age;

- (id) initWithName:(NSString*) _name withAge:(int) _age;

- (void) display;

@end

#import "Person.h"

#define NAME @"NAME"
#define AGE @"AGE"

@implementation Person

@synthesize name;
@synthesize age;

- (id) initWithName:(NSString*) _name withAge:(int) _age {
if (self = [super init]) {
self.name = _name;
self.age = _age;
}
return self;
}

- (void) display {
NSLog(@"Person Name : %@\t Age :%d",name,age);
}

//归档编码
- (void)encodeWithCoder:(NSCoder *)aCoder {
[aCoder encodeObject:name forKey:NAME];
[aCoder encodeInt:age forKey:AGE];
}

//解归档解码
- (id)initWithCoder:(NSCoder *)aDecoder {
if (self = [super init]) {
self.name = [aDecoder decodeObjectForKey:NAME];
self.age = [aDecoder decodeIntForKey:AGE];
}
return self;
}

@end