iOS解档与归档

// 解档

- (instancetype)initWithCoder:(NSCoder *)aDecoder

{

    if (self = [super init]) {

        unsigned int count;

        Ivar* ivars = class_copyIvarList([self class], &count);

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

            Ivar ivar = ivars[i];

            const char* name = ivar_getName(ivar);

            NSString* strName = [NSString stringWithUTF8String:name];

            id value = [aDecoder decodeObjectForKey:strName];

            [self setValue:value forKey:strName];

        }

        free(ivars);

    }

    return self;

}

// 归档

- (void)encodeWithCoder:(NSCoder *)aCoder

{

    unsigned int count;

    Ivar *ivars = class_copyIvarList([self class], &count);

    for (int i = 0; i < count; i++) {

        Ivar ivar = ivars[i];

        const char* name = ivar_getName(ivar);

        NSString* strName = [NSString stringWithUTF8String:name];

        id value = [self valueForKey:strName];

        [aCoder encodeObject:value forKey:strName];

    }

    free(ivars);

}

头文件必须导入 

#import <objc/runtime.h>