IOS 反射获取属性，序列化成xml

学习Object-C不足一个月。 写的较简单。支持复杂对象，目前对象中只支持NSSTRING类型和自定义类。

因为项目需要，调用service时候，一定要用xml作为数据，我Google了两天，没找到支持复杂对象的序列化。不知各位大牛有什么好的类库实现了对象和xml的互转？以前习惯在.net下有现成的，转到Object-C下面，貌似好多要自己写！各种纠结！

下面是我用Object-C实现的将对象转为xml的方法。但是还没研究出来如何将xml转为对象的解决方案。忘高手指导一二。

ConvertObjToXml.h

//
//  ConvertObjToXml.h
////
//  Created by Elliott on 13-3-5.
//  Copyright (c) 2013年 Elliott. All rights reserved.
//

#import <Foundation/Foundation.h>
@interface ConvertObjToXml : NSObject

+(NSString *)Convert:(id)obj;

@end

ConvertObjToXml.m

//
//  ConvertObjToXml.m
//  WebServiceTest
//
//  Created by Elliott on 13-3-5.
//  Copyright (c) 2013年 Elliott. All rights reserved.
//
#import <objc/runtime.h>
#import "ConvertObjToXml.h"

@implementation ConvertObjToXml
+(NSString *)Convert:(id)obj
{
unsigned int outCount, i;
objc_property_t *properties = class_copyPropertyList([obj class], &outCount);
NSString *xml=[[NSString alloc]initWithFormat:@"<%@>",[obj class]];
for(i = 0; i < outCount; i++) {
objc_property_t property = properties[i];
NSString *key=[[NSString alloc]initWithCString:property_getName(property) encoding:NSUTF8StringEncoding];
id value=[obj valueForKey:key];

if (value!=nil) {
//IF NOT NSSTRING,LOOP!!!!!!
if (![value isKindOfClass:[NSString class]]) {
//NSLog(@"子类：%@",[ConvertObjToXml Convert:[obj valueForKey:key]]);
xml=[xml stringByAppendingFormat:@"%@",[ConvertObjToXml Convert:[obj valueForKey:key]]];
}
else
{
xml=[xml stringByAppendingFormat:@"<%@>%@</%@>",key,value,key];
}
}
else
{
xml=[xml stringByAppendingFormat:@"<%@>%@</%@>",key,@"",key];
}
}
xml=[xml stringByAppendingFormat:@"</%@>",[obj class]];

//NSLog(@"结果：%@",xml);

free(properties);

return xml;
}
@end

调用方式：

NSString *xml= [ConvertObjToXml Convert:obj];
NSLog(@"Result:%@",xml);

案例：

首先定义了两个类，一个UserInfo,一个companyinfo。UserInfo中包含companyinfo这个类。

USERINFO.h

//
//  USERINFO.h
//
//
//  Created by Elliott on 13-3-5.
//  Copyright (c) 2013年 Elliott. All rights reserved.
//

#import <Foundation/Foundation.h>
@class CompanyInfo;
@interface USERINFO : NSObject
@property(nonatomic,strong) CompanyInfo *CompanyInfo;
@property(nonatomic,strong) NSString *USERID;
@property(nonatomic,strong) NSString *PASSWORD;
@property(nonatomic,strong) NSString *USERTYPE;

@end

USERINFO.m

//
//  USERINFO.m
//
//
//  Created by Elliott on 13-3-5.
//  Copyright (c) 2013年 Elliott. All rights reserved.
//
#import <objc/runtime.h>
#import "USERINFO.h"
#import "ConvertObjToXml.h"
@implementation USERINFO

@end

CompanyInfo.h

//
//  CompanyInfo.h
//
//
//  Created by Elliott on 13-3-5.
//  Copyright (c) 2013年 Elliott. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface CompanyInfo : NSObject

@property(nonatomic,strong) NSString *CompanyName;
@property(nonatomic,strong) NSString *CompanyCode;

@end

CompanyInfo.m

//
//  CompanyInfo.m
//
//
//  Created by Elliott on 13-3-5.
//  Copyright (c) 2013年 Elliott. All rights reserved.
//

#import "CompanyInfo.h"

@implementation CompanyInfo

@end

调用：

USERINFO *user=[[USERINFO alloc] init];
user.USERID=@"aaa";
CompanyInfo *info=[[CompanyInfo alloc]init];
info.CompanyName=@"companyname";
info.CompanyCode=@"code";
user.CompanyInfo=info;
NSLog(@"%@",[ConvertObjToXml Convert:user]);

结果：

<USERINFO><CompanyInfo><CompanyName>companyname</CompanyName><CompanyCode>code</CompanyCode></CompanyInfo><USERID>aaa</USERID><PASSWORD></PASSWORD><USERTYPE></USERTYPE></USERINFO>