平常开发中,有时候需要对少量存储的数据进行归档处理,但我们又不想对数据一个一个的进行处理,那,我们就能用runtime 进行动态的归解档!
直接上代码:
//归档
-(void)encodeWithCoder:(NSCoder *)aCoder{
unsigned int count = 0;
// 利用runtime获取实例变量的列表
Ivar *ivars = class_copyIvarList([self class], &count);
for (int i = 0; i < count; i ++) {
// 取出i位置对应的实例变量
Ivar ivar = ivars[i];
// 查看实例变量的名字
const char *name = ivar_getName(ivar);
// C语言字符串转化为NSString
NSString *nameStr = [NSString stringWithCString:name encoding:NSUTF8StringEncoding];
// 利用KVC取出属性对应的值
id value = [self valueForKey:nameStr];
// 归档
[aCoder encodeObject:value forKey:nameStr];
}
// 记住C语言中copy出来的要进行释放
free(ivars);
}
//解档
- (id)initWithCoder:(NSCoder *)decoder
{
if (self = [super init]) {
unsigned int count = 0;
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 *key = [NSString stringWithCString:name encoding:NSUTF8StringEncoding];
id value = [decoder decodeObjectForKey:key];
// 设置到成员变量身上
[self setValue:value forKey:key];
}
free(ivars);
}
return self;
}
Demo地址:https://github.com/JnKindle/DynamicArchive
欢迎大家访问我的GitHub
GitTub:https://github.com/JnKindle