objc对象归档 序列化
NSString、NSArray、NSData、NSDictionary都实现了NSCoding协议，可直接通过调用writeToFile归档，那么OBJC自定义对象类型呢？首先实现NSCoding协议，重写encodeWithCode方法和initWithCode方法，然后通过NSKeyedArchiver转换为NSData，然后通过NSData的writeToFile方法写入到文件，或者将转换后的NSData放入到NSArray或NSDictionary中调用writeToFile写入到文件便可实现包装了自定义类型的数据和字典的归档；通过NSKeyedUnarchiver读取归档文件到对象，或者通过NSArray的arrrayWithContentsOfFile或NSDictionary的dictionaryWithContentsOfFile到数组对象或字典，然后取出序列化过的自定义对象（即自定义对象的NSData形式），然后通过NSKeyedUnarchiver反归档到对象。
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------------------------------------------------测试代码------------------------------------------------
NSString *str = @"hello";
[str writeToFile:@"/Users/lili/Desktop/str.txt" atomically:YES encoding:NSUTF8StringEncoding error:nil];
NSArray *arr = [[NSArray alloc]initWithObjects:@"lili",@"tata", nil];
[arr writeToFile:@"/Users/lili/Desktop/arr.txt" atomically:YES];
NSDictionary *dict = [NSDictionary dictionaryWithObjects:@[@"lili",@"男"] forKeys:@[@"name",@"易做图"]];
[dict writeToFile:@"/Users/lili/Desktop/dict.txt" atomically:YES];
Person *parent = [[Person alloc]init];
parent.age = 40;
parent.name = @"lili";
Person *child = [[Person alloc]init];
child.age = 22;
child.name = @"linian";
parent.child = child;
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:parent];
[data writeToFile:@"/Users/lili/Desktop/data.txt" atomically:YES];
Person *people = [NSKeyedUnarchiver unarchiveObjectWithFile:@"/Users/lili/Desktop/data.txt"];
NSLog(@"%@",people);
NSDictionary *dictPerson = [NSDictionary dictionaryWithObjects:@[[NSKeyedArchiver archivedDataWithRootObject:parent],[NSKeyedArchiver archivedDataWithRootObject:child]] forKeys:@[@"parent",@"child"]];
[dictPerson writeToFile:@"/Users/lili/Desktop/dictPerson.txt" atomically:YES];
NSDictionary *pdict = [NSDictionary dictionaryWithContentsOfFile:@"/Users/lili/Desktop/dictPerson.txt"];
Person *tPerson = [NSKeyedUnarchiver unarchiveObjectWithData:[pdict objectForKey:@"parent"]];
NSLog(@"%@",tPerson);
NSArray *arrPerson = [[NSArray alloc]initWithObjects:[NSKeyedArchiver archivedDataWithRootObject:parent],[NSKeyedArchiver archivedDataWithRootObject:parent], nil];
[arrPerson writeToFile:@"/Users/lili/Desktop/arrPerson.txt" atomically:YES];
NSArray *pArr = [NSArray arrayWithContentsOfFile:@"/Users/lili/Desktop/arrPerson.txt"];
Person *aPerson = [NSKeyedUnarchiver unarchiveObjectWithData:[pArr objectAtIndex:0]];
NSLog(@"%@",aPerson);
------------------------------------------------Person类------------------------------------------------
#import <Foundation/Foundation.h>
@inte易做图ce Person : NSObject<NSCoding>
@property(strong,nonatomic)Person *child;
@property(assign,nonatomic)int age;
@property(copy,nonatomic)NSString *name;
@end
#import "Person.h"
@implementation Person
-(NSString *)description
{
return [NSString stringWithFormat:@"{age:%d,name:%@,child:%@}",self.age,self.name,self.child];
}
-(void)encodeWithCoder:(NSCoder *)aCoder
{
[aCoder encodeInt:self.age forKey:@"age"];
[aCoder encodeObject:self.name forKey:@"name"];
[aCoder encodeObject:self.child forKey:@"child"];
}
-(id)initWithCoder:(NSCoder *)aDecoder
{
if(self = [super init]){
self.age = [aDecoder decodeIntForKey:@"age"];
self.name = [aDecoder decodeObjectForKey:@"name"];
self.child = [aDecoder decodeObjectForKey:@"child"];
}
return self;
}
@end
------------------------------------------------测试代码------------------------------------------------
NSString *str = @"hello";
[str writeToFile:@"/Users/lili/Desktop/str.txt" atomically:YES encoding:NSUTF8StringEncoding error:nil];
NSArray *arr = [[NSArray alloc]initWithObjects:@"lili",@"tata", nil];
[arr writeToFile:@"/Users/lili/Desktop/arr.txt" atomically:YES];
NSDictionary *dict = [NSDictionary dictionaryWithObjects:@[@"lili",@"男"] forKeys:@[@"name",@"易做图"]];
[dict writeToFile:@"/Users/lili/Desktop/dict.txt" atomically:YES];
Person *parent = [[Person alloc]init];
parent.age = 40;
parent.name = @"lili";
Person *child = [[Person alloc]init];
child.age = 22;
child.name = @"linian";
parent.child = child;
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:parent];
[data writeToFile:@"/Users/lili/Desktop/data.txt" atomically:YES];
Person *people = [NSKeyedUnarchiver unarchiveObjec
补充：移动开发 , IOS ,
