NSXMLParser划分包含外部(unicode)字符的字符串

Question

我遇到了NSXMLParser的一个特殊问题.

由于某种原因,它会删除所有挪威字符æ,ø和å前面的所有字符.

但是,问题似乎与所有非az字符相同.(所有外国字符)

例子:

现实:Mål输出:ål

现实:Le chantdessirènes输出:ènes

下面是我从日志中打印出字符串的示例:

- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string

日志:

2012-02-22 14:00:01.647 VotePlayClient[2776:207] found characters: Le chant des sir
2012-02-22 14:00:01.647 VotePlayClient[2776:207] found characters: ènes

你可以清楚地看到它在遇到外国信件时跳转到一个新行.

我相信我必须弄清楚如何追加字符串或其他东西.

以下是NSXMLParser文件:

SearchXMLParser.h

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

@interface SearchXMLParser : NSObject <NSXMLParserDelegate>
{
NSMutableString *currentNodeContent;
NSMutableArray *searchhits;
NSMutableArray *trackhits;

NSXMLParser *parser;
Search *currentSearch;  
}

@property (readonly, retain) NSMutableArray *searchhits;
@property (readonly, retain) NSMutableArray *trackhits;

-(id) loadXMLByURL:(NSString *)urlString;

@end

SearchXMLParser.m

#import "SearchXMLParser.h"
#import "Search.h"

@implementation SearchXMLParser

@synthesize searchhits, trackhits;

-(id) loadXMLByURL:(NSString *)urlString
{
    searchhits          = [[NSMutableArray alloc] init];
trackhits           = [[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 didStartElement:(NSString *)elementname namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
if ([elementname isEqualToString:@"track"]) 
{
    currentSearch = [Search alloc];
}

if ([elementname isEqualToString:@"track"]) 
{
    currentSearch.trackurl = [attributeDict objectForKey:@"href"];
}
}

- (void) parser:(NSXMLParser *)parser didEndElement:(NSString *)elementname namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{   
if ([elementname isEqualToString:@"name"]) 
{
    [trackhits addObject:currentNodeContent];

}

if ([elementname isEqualToString:@"track"]) 
{
    currentSearch.track = [trackhits objectAtIndex:0];
    currentSearch.artist = [trackhits objectAtIndex:1];
    currentSearch.album = [trackhits objectAtIndex:2];
    [trackhits removeAllObjects];

    [searchhits addObject:currentSearch];
    [currentSearch release];
    currentSearch = nil;
    [currentNodeContent release];
    currentNodeContent = nil;
}
}

- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
NSLog(@"found characters: %@", string);
currentNodeContent = (NSMutableString *) [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
}

- (void) dealloc
{
[parser release];
[super dealloc];
}

@end

我已经检查了SO的答案,发现了几个类似的帖子,但没有任何一个能够明确解决这个问题的方法.

任何人都可以解释这个问题吗？:) 任何帮助深表感谢!

Answer 1

你的解析器:foundCharacters:方法不能正常工作.

这来自NSXMLParserDelegate协议参考

解析器对象可以向委托发送几个解析器:foundCharacters:消息来报告元素的字符.因为字符串可能只是当前元素的总字符内容的一部分,所以应该将其附加到当前字符的累积,直到元素更改为止.

你可以试试这样的东西(ARC):

- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    NSLog(@"found characters: %@", string);
    if (!currentNodeContent) {
        currentNodeContent = [[NSMutableString alloc] init];
    }
    [currentNodeContent appendString:string];
}

- (void) parser:(NSXMLParser *)parser didEndElement:(NSString *)elementname namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{   
    // your code here

    // when you are done with the string:
    currentNodeContent = nil;
}