#import//导入runtime头文件

@implementationCommentModel

- (NSString*)description {

//初始化一个字典

NSMutableDictionary*dictionary = [NSMutableDictionarydictionary];

//得到当前class的所有属性

uintcount;

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

//循环并用KVC得到每个属性的值

for(inti =0; i

objc_property_tproperty = properties[i];

NSString*name =@(property_getName(property));

idvalue = [selfvalueForKey:name]?:@"nil";//默认值为nil字符串

[dictionarysetObject:valueforKey:name];//装载到字典里

}

//释放

free(properties);

//return

return[NSStringstringWithFormat:@"<%@: %p> -- %@",[selfclass],self,dictionary];

}