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假设我从网络上的 xml 文件中解析了以下配置文件并想要删除重复项，我该怎么做？例如，有 2 个具有相同名字 (Amin) 的配置文件，我只想显示 1 个。我正在使用 NSLog 在命令输出窗口中显示从 xml 文件解析的所有配置文件，并说我是否想要一个按钮应该过滤配置文件并删除重复项并更新命令输出窗口（使用 NSLog）并删除重复项。

<profiles>
  <profile>
    <firstname>Amin</firstname>
    <lastname>Ziarkash</lastname>
    <address>Melisstokelaan 2068</address>
    <zipcode>2541 GH</zipcode>
    <city>Den Haag</city>
    <email>a.ziarkash@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Niko</firstname>
    <lastname>De Vries</lastname>
    <address>Sterrelaan 34</address>
    <zipcode>3342 JH</zipcode>
    <city>Amsterdam</city>
    <email>niko@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Marcel</firstname>
    <lastname>Janssens</lastname>
    <address>Voorhoeveweg 11</address>
    <zipcode>6006SV</zipcode>
    <city>Weert</city>
    <email>marcel.j@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Amin</firstname>
    <lastname>Ziarkash</lastname>
    <address>Melisstokelaan 2068</address>
    <zipcode>2541 GH</zipcode>
    <city>Den Haag</city>
    <email>a.ziarkash@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Kevin</firstname>
    <lastname>De Vries</lastname>
    <address>Stuyvesantweg 2</address>
    <zipcode>2541 GH</zipcode>
    <city>Wolvega</city>
    <email>kevin@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Niko</firstname>
    <lastname>De Vries</lastname>
    <address>Sterrelaan 34</address>
    <zipcode>3342 JH</zipcode>
    <city>Amsterdam</city>
    <email>niko@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Gido</firstname>
    <lastname>Van der Veen</lastname>
    <address>Klausstraat 12</address>
    <zipcode>7726 GH</zipcode>
    <city>Den Haag</city>
    <email>gido.j@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Nilo</firstname>
    <lastname>Yaqobi</lastname>
    <address>Kamperslaan 15</address>
    <zipcode>3728 JH</zipcode>
    <city>Delft</city>
    <email>nilo@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Casper</firstname>
    <lastname>Van Zanten</lastname>
    <address>Molenweg 98</address>
    <zipcode>3411 HJ</zipcode>
    <city>Amsterdam</city>
    <email>Casper.j@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Geert</firstname>
    <lastname>Diujkstra</lastname>
    <address>Binnenszijde 47</address>
    <zipcode>5362 PL</zipcode>
    <city>Amsterdam</city>
    <email>geert@hotmail.com</email>
  </profile>

  <profile>
    <firstname>Thijs</firstname>
    <lastname>Venema</lastname>
    <address>Koolstraat 21</address>
    <zipcode>6473 AA</zipcode>
    <city>Amsterdam</city>
    <email>venema@hotmail.com</email>
  </profile>

</profiles>

解析代码：

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

bool isStatus;
ViewController *currentProfile;
ViewController *xmlParser;
NSXMLParser *parser;
NSMutableString *currentNodeContent;

-(id)loadXMLByURL:(NSString *)urlString
{
    profile = [[NSMutableArray alloc] init];
    NSURL *url = [NSURL URLWithString:urlString];
    NSData *data = [[NSData alloc] initWithContentsOfURL:url];
    parser = [[NSXMLParser alloc] initWithData:data];
    parser.delegate = self;
    [parser parse];
    return self;
}

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    currentNodeContent = (NSMutableString *) [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
}

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    if([elementName isEqualToString:@"firstname"])
    {
        currentProfile = [ViewController alloc];
        isStatus = YES;
    }
}

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if([elementName isEqualToString:@"firstname"])
    {
        currentProfile->firstName = currentNodeContent;
        NSLog(@"%@",currentProfile->firstName);
        [profile addObject:currentProfile];
    }
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    xmlParser = [[ViewController alloc] loadXMLByURL:@"http://dierenpensionlindehof.nl/profiles1.xml"];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

编辑

我为解析创建了一个单独的类以简化该过程。现在我想在原始 ViewController 类的 viewDidLoad 中从此类（XMLParser 类）加载 -(void)loadXML，但它给了我错误。有人可以告诉我我在这里做错了什么吗？

视图控制器.m

#import "ViewController.h"
#import "XMLParser.h"


@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self XMLParser:loadXML];

}

XMLParser.h

#import <Foundation/Foundation.h>
#import "ViewController.h"

@interface XMLParser : NSObject

{
    NSMutableArray *profile;
    NSString *firstName;
}

- (void)loadXMLByURL:(NSString *)urlString; //Added after edit
- (void)loadXML; //Added after edit

@end

XMLParser.m

#import "XMLParser.h"

@implementation XMLParser

bool isStatus;
XMLParser1 *currentProfile;
XMLParser1 *xmlParser;
NSXMLParser *parser;
NSMutableString *currentNodeContent;

-(void)loadXMLByURL:(NSString *)urlString
{
    profile = [[NSMutableArray alloc] init];
    NSURL *url = [NSURL URLWithString:urlString];
    NSData *data = [[NSData alloc] initWithContentsOfURL:url];
    parser = [[NSXMLParser alloc] initWithData:data];
    parser.delegate = self;
    [parser parse];
}

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    currentNodeContent = (NSMutableString *) [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
}

-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    if([elementName isEqualToString:@"firstname"])
    {
        currentProfile = [XMLParser1 alloc];
        isStatus = YES;
    }
}

-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if([elementName isEqualToString:@"firstname"])
    {
        currentProfile->firstName = currentNodeContent;
        NSLog(@"%@",currentProfile->firstName);
        [profile addObject:currentProfile];
    }
}

- (void)loadXML
{
    [self loadXMLByURL:@"http://dierenpensionlindehof.nl/profiles1.xml"];
}

@end
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