如何在iOS编程中从web加载的xml中删除重复项
比如说,如果我从web上的xml文件中解析了以下配置文件,并希望删除重复的配置文件,我将如何做到这一点?例如,有两个同名(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,并说我是否希望有一个按钮来过滤配置文件并删除重复项,并使用删除的重复项更新命令输出窗口(使用NSLog)如何在iOS编程中从web加载的xml中删除重复项,ios,objective-c,xml,xcode,deduplication,Ios,Objective C,Xml,Xcode,Deduplication,比如说,如果我从web上的xml文件中解析了以下配置文件,并希望删除重复的配置文件,我将如何做到这一点?例如,有两个同名(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,并说我是否希望有一个按钮来过滤配置文件并删除重复项,并使用删除的重复项更新命令输出窗口(使用NSLog) <profiles> <profile> <firstname>Amin</firstname>
<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>
编辑
我为解析创建了一个单独的类,以简化过程。现在我想从原始ViewController类的viewDidLoad中的这个类(XMLParser类)加载-(void)loadXML,但它给了我错误。。有人能告诉我我做错了什么吗
ViewController.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
为什么
loadXMLByURL:
返回self
?为什么viewdiload
创建ViewController
?非常奇怪。@Trojan这就是我如何让它工作的,对不起,我是objective-C新手,所以还没有太多经验。。你建议我怎么做?虽然它似乎是这样工作的,但它输出我想要的名称。这很好,因为您有一个自定义类来执行XML解析(并可能以某种形式存储它),但是它不是视图控制器,所以称它为XmlParser
(或类似的名称),并从NSObject
派生它。这也可以执行重复过滤。但是,无需从loadXMLByURL:
返回self
,如果该方法不可能出现错误,则返回BOOL
或void
。@特洛伊木马感谢您的回答,我将loadXMLByURL“code”更改为void,并在viewDidLoad中加载“code”。我用[self-loadXMLByURL:@“…”;”来称呼它代码'。我不明白你的意思:所以称它为XmlParser(或类似的),并从NSObject派生它。你能再解释一下吗?对于重叠过程..看起来您有一个名为ViewController
的类,在该类中,您可以在加载视图时创建另一个实例。这是错误的。创建另一个XML解析器类,并将与加载和筛选XML数据相关的所有功能放在该类中。
#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
#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