runtime运用 -从一个模型中找出所有属性赋值给另外一个模型

-(talkuser*)changeModle:(id)model

{

unsigned int count;

objc_property_t *properties=class_copyPropertyList([model class], &count);

talkuser *backModel=[[talkuser alloc]init];

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

objc_property_t property = properties[i];

//获取属性的名称C语言字符串

const char *cName =property_getName(property);

//转换为Objective C字符串

NSString *name = [NSString stringWithCString:cName encoding:NSUTF8StringEncoding];

id value= [model valueForKey:name];

[backModel setValue:value forKey:name];

}
free(propertys);
returnbackModel;

}