runtime------class_copyPropertyList---------setValue---forKey-

#import <objc/runtime.h>
 
+ (NSArray *)propertList {
    unsigned int count = 0;
   //获取模型属性, 返回值是所有属性的数组 objc_property_t
    objc_property_t *propertyList = class_copyPropertyList([self class], &count);
    NSMutableArray *arr = [NSMutableArray array];
    //便利数组
    for (int i = 0; i< count; i++) {
    //获取属性
    objc_property_t property = propertyList[i];
    //获取属性名称
    const char *cName = property_getName(property);
    NSString *name = [[NSString alloc]initWithUTF8String:cName];
    //添加到数组中
    [arr addObject:name];
    }
    //释放属性组
    free(propertyList);
    return arr.copy;
}

+ (instancetype)modelWithDict:(NSDictionary *)dict {
    id obj = [self new];
    // 遍历属性数组
    for (NSString *property in [self propertList]) {
    // 判断字典中是否包含这个key
    if (dict[property]) {
        // 使用 KVC 赋值
        [obj setValue:dict[property] forKey:property];
        }
    }
    return obj;
}