IOS 利用运行时机制来进行归档解档

前言：我们需要对一个类的属性进行归档解档的时候属性特别的多，这时候，我们就会写很多对应的代码，但是如果使用了runtime就可以动态设置，就会变的很轻松！

首先需要导入<objc/runtime.h>

其次归档解档需要遵循NSCoding协议

核心代码

- (void)encodeWithCoder:(NSCoder *)encoder{    unsigned int count = 0;    //1.获取该类所有的成员变量    Ivar *ivars = class_copyIvarList([IWMerchantBasicInfo class], &count);    for (int i = 0; i < count; i ++) {        Ivar ivar = ivars[i];        //2.查看成员变量        const char *name = ivar_getName(ivar);        //3.根据key获取到对应的value        NSString *key = [NSString stringWithUTF8String:name];        id value = [self valueForKey:key];        //4.归档        [encoder encodeObject:value forKey:key];    }    //5.释放    free(ivars);}- (instancetype)initWithCoder:(NSCoder *)decoder{    if (self = [super init]) {        unsigned int count = 0;        //1.获取该类所有的成员变量        Ivar *ivars = class_copyIvarList([IWMerchantBasicInfo class], &count);        for (int i = 0 ; i < count; i ++) {            Ivar ivar = ivars[i];            //2.查看成员变量            const char *name = ivar_getName(ivar);            //3.根据key获取到对应的value            NSString *key = [NSString stringWithUTF8String:name];            id value = [self valueForKey:key];            [self setValue:value forKey:key];        }        //4.释放        free(ivars);    }    return self;}

示例代码：

.h文件

#import <Foundation/Foundation.h>@interface IWMerchantBasicInfo : NSObject<NSCoding>//商铺编码@property (copy,nonatomic) NSString *merchant_id;//商铺名称@property (copy,nonatomic) NSString *merchant_name;//商铺Logo@property (copy,nonatomic) NSString *logo;//商铺描述@property (copy,nonatomic) NSString *merchant_des;//商铺描述图片@property (copy,nonatomic) NSString *merchant_des_pic;//商铺描述图片@property (copy,nonatomic) NSArray *merchant_des_pics;//联系人@property (copy,nonatomic) NSString *contact;//联系手机号码@property (copy,nonatomic) NSString *contact_phone;//固定电话号码@property (copy,nonatomic) NSString *landline_phone;//营业时间@property (copy,nonatomic) NSString *business_times;//广告语@property (copy,nonatomic) NSString *ad;//商家分类@property (copy,nonatomic) NSString *category_id;//经度@property (assign,nonatomic) float longitude;//纬度@property (assign,nonatomic) float latitude;//店铺地址@property (copy,nonatomic) NSString *merchant_address;//商家活动小图标@property (copy,nonatomic) NSString *bd_thumbnail;//商家活动小图标数组@property (nonatomic,strong) NSArray *bdThumbnails;//评分@property (assign,nonatomic) float score;//是否被收藏@property (nonatomic,assign) BOOL collected;@end

.m文件

#import "IWMerchantBasicInfo.h"#import <objc/runtime.h>@implementation IWMerchantBasicInfo- (void)setBd_thumbnail:(NSString *)bd_thumbnail{    _bd_thumbnail = bd_thumbnail;    if (_bd_thumbnail.length != 0) {        NSMutableArray *array = (NSMutableArray *)[_bd_thumbnail componentsSeparatedByString:@","];        for (NSString *arrayStr in array) {            if (arrayStr.length == 0 || [arrayStr isEqualToString:@""]) {                [array removeObject:arrayStr];            }        }        _bdThumbnails = array;    }}- (void)setMerchant_des_pic:(NSString *)merchant_des_pic{    _merchant_des_pic = merchant_des_pic;    if (_merchant_des_pic.length != 0) {        NSMutableArray *array = (NSMutableArray *)[_merchant_des_pic componentsSeparatedByString:@","];        for (NSString *arrayStr in array) {            if (arrayStr.length == 0 || [arrayStr isEqualToString:@""]) {                [array removeObject:arrayStr];            }        }        _merchant_des_pics = array;    }}- (void)encodeWithCoder:(NSCoder *)encoder{    unsigned int count = 0;    //1.获取该类所有的成员变量    Ivar *ivars = class_copyIvarList([IWMerchantBasicInfo class], &count);    for (int i = 0; i < count; i ++) {        Ivar ivar = ivars[i];        //2.查看成员变量        const char *name = ivar_getName(ivar);        //3.根据key获取到对应的value        NSString *key = [NSString stringWithUTF8String:name];        id value = [self valueForKey:key];        //4.归档        [encoder encodeObject:value forKey:key];    }    //5.释放    free(ivars);}- (instancetype)initWithCoder:(NSCoder *)decoder{    if (self = [super init]) {        unsigned int count = 0;        //1.获取该类所有的成员变量        Ivar *ivars = class_copyIvarList([IWMerchantBasicInfo class], &count);        for (int i = 0 ; i < count; i ++) {            Ivar ivar = ivars[i];            //2.查看成员变量            const char *name = ivar_getName(ivar);            //3.根据key获取到对应的value            NSString *key = [NSString stringWithUTF8String:name];            id value = [self valueForKey:key];            [self setValue:value forKey:key];        }        //4.释放        free(ivars);    }    return self;}@end