【IPHONE开发-OBJECTC入门学习】对象的归档和解归档

我会带着你远行 2022-01-28 02:34 228阅读 0赞

main.m

#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;
    }

Person.h

#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

Person.m

#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