iOS：序列化与反序列化

一般情况把一个模型存在本地，一般情况使用序列化与反序列化的基本代码去实现比较麻烦，使用runtime（so easy)，具体代码实现如下

1.创建一个student类 .h文件

@interface Student : NSObject

@property (nonatomic, copy) NSString *name;

@property (nonatomic, copy) NSString *age;

2.student.m 主要实现方法

#import "Student.h"

#import <objc/runtime.h>

@implementation Student

//对象编码和解码

-(void)encodeWithCoder:(NSCoder *)aCoder{

unsigned int count = 0;

//获得指向该类所有属性的指针

objc_property_t *propert = class_copyPropertyList([Student class], &count);

for (int i = 0 ; i < count; i++) {

//根据objc_property_t获得其属性的名称--->C语言的字符串

objc_property_t pro = propert[i];

const char *name = property_getName(pro);

NSString  *key = [NSString stringWithUTF8String:name];

//编码每个属性,利用KVC取出每个属性对应的数值

[aCoder encodeObject:[self valueForKey:key] forKey:key];

NSString *vc = [self valueForKey:key];

NSLog(@"123=======%@",vc);

}

}

-(instancetype)initWithCoder:(NSCoder *)aDecoder{

if (self = [super init]) {

unsigned int count = 0;

objc_property_t *property = class_copyPropertyList([Student class], &count);

for (int i = 0; i < count; i++) {

objc_property_t proc = property[i];

const char *name =  property_getName(proc);

NSString *key = [NSString stringWithUTF8String:name];

NSString *vc = [self valueForKey:key];

vc = [aDecoder decodeObjectForKey:key];

}

}

return self;

}

@end

3.ViewController的具体实现方法

存模型的方法

Student *student = [Student new];

student.name = @"测试";

student.age = @"20";

NSData *data = [NSKeyedArchiver archivedDataWithRootObject:student];

[[NSUserDefaults standardUserDefaults]setObject:data forKey:@"student"];

[[NSUserDefaults standardUserDefaults]synchronize];

取模型的方法

NSData *data = [[NSUserDefaults standardUserDefaults]objectForKey:@"student"];

Student *student = [NSKeyedUnarchiver unarchiveObjectWithData:data];