Objective C 类到 NSDictionary
我将 NSDictionary 发布到 JSON Web 服务，以将数据保存回本地数据库。将 Objective C 类转换为 NSDictionaries 的最佳方法是什么？
这是我当前的代码，除了编写更通用的版本之外，这是最好的方法/唯一的方法吗？包括
- (NSDictionary*)dictionaryFromContact {
Class contactClass = [self class];
u_int count;
objc_property_t *properties = class_copyPropertyList(contactClass, &count);
NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithCapacity:count];
for (int i = 0; i<count; i++) {
NSString *str = [NSString stringWithCString:property_getName(properties[i])
encoding:NSUTF8StringEncoding];
//Set the dicationary values from our properties
[dict setValue:[self valueForKey:str] forKey:str];
}
free(properties);
return [dict autorelease];
}
谢谢！
Iam posting a NSDictionary to a JSON webservice for saving my data back to a local database. Whats the best way of converting Objective C classes to NSDictionaries?
Here is my current code, except from writing a more generic version, is this the best way/only to do this? And including <obj/runtime.h> is OK with apple?
- (NSDictionary*)dictionaryFromContact {
Class contactClass = [self class];
u_int count;
objc_property_t *properties = class_copyPropertyList(contactClass, &count);
NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithCapacity:count];
for (int i = 0; i<count; i++) {
NSString *str = [NSString stringWithCString:property_getName(properties[i])
encoding:NSUTF8StringEncoding];
//Set the dicationary values from our properties
[dict setValue:[self valueForKey:str] forKey:str];
}
free(properties);
return [dict autorelease];
}
Thanks!
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评论（2）
class_copyPropertyList是合法的。您可以考虑使用dictionaryWithValuesForKeys:作为快捷方式。如果您将
Core Data用于本地数据库，则应使用attributesByName和relationshipsByName或propertiesByName。class_copyPropertyListis legit. You may considerdictionaryWithValuesForKeys:for shortcut.If you use
Core Datafor local database, you should useattributesByNameandrelationshipsByName, orpropertiesByName.查看 对象映射 功能/restkit.org" rel="nofollow">RestKit，它可能会满足您的需要。
Have a look at the Object Mapping feature of RestKit, it might do what you need.