Question

我开发了一个applikation，它使用XML Parser加载指定的url。此URL有时会更改，并且每4秒重新加载一次。（通过NSTIMER）

在模拟器上它可以很好地工作，但在设备上它总是一样的（就像一种缓存）

-(void)parseXMLFileAtURL:(NSString *) URL{
    NSLog(@"Parsed XML URL: %@", URL);
    currentURL=[URL copy];;
    tutorials=  [[NSMutableArray alloc] init];
    settings=   [[NSMutableArray alloc] init];
    NSURL *xmlURL=[NSURL URLWithString:URL];
    xmlParser =[[NSXMLParser alloc] initWithContentsOfURL:xmlURL];
    [xmlParser setDelegate:self];
    [xmlParser parse];
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict{
currentElement= [elementName copy];
    if([elementName isEqualToString:@"item"]){
       item=[[NSMutableDictionary alloc] init];
        currentTitle=[[NSMutableString alloc] init];
        currentImage=[[NSMutableString alloc] init];
        currentLink=[[NSMutableString alloc] init];
        currentDetails=[[NSMutableString alloc] init];
        }
    if([elementName isEqualToString:@"setting"]){
        setting=[[NSMutableDictionary alloc] init];
        currentTitle=[[NSMutableString alloc] init];
        currentTyp=[[NSMutableString alloc] init];
        currentLink=[[NSMutableString alloc] init];
    }

}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    if([elementName isEqualToString:@"item"]){
    NSLog(@"currenttitle: %@",currentTitle );
        [item setObject:currentTitle forKey:@"title"];
        [item setObject:currentImage forKey:@"image"];      
        [item setObject:currentLink forKey:@"link"];
        [item setObject:currentDetails forKey:@"details"];
        [tutorials addObject:[item copy]];
    }
    if([elementName isEqualToString:@"setting"]){
        NSLog(@"Currentsettingtitle: %@",currentTitle );
        [setting setObject:currentTitle forKey:@"title"];
        [setting setObject:currentTyp forKey:@"typ"];       
        [setting setObject:currentLink forKey:@"link"];
        [settings addObject:[setting copy]];
    }
}


}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    if([currentElement isEqualToString:@"title"]){
        [currentTitle appendString:string];
    }
    if([currentElement isEqualToString:@"image"]){
        [currentImage appendString:string];
    }   
    if([currentElement isEqualToString:@"link"]){
        [currentLink appendString:string];
    }

    if([currentElement isEqualToString:@"typ"]){
        [currentTyp appendString:string];
    }
    if([currentElement isEqualToString:@"details"]){
        [currentDetails appendString:string];
    }

}
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
    NSLog(@"Fertig mit Document");  
    for (int i=0; i<[settings count]; i++) {
        NSString *typ =(NSString*)[[settings objectAtIndex:i ] objectForKey:@"typ"];
        typ=[typ stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]];
        if([typ isEqualToString:@"Button1"])
            button1.title=(NSString*)[[settings objectAtIndex:i ] objectForKey:@"title"];
        if([typ isEqualToString:@"Button2"])
            button2.title=(NSString*)[[settings objectAtIndex:i ] objectForKey:@"title"];
        if([typ isEqualToString:@"Button3"])
            button3.title=(NSString*)[[settings objectAtIndex:i ] objectForKey:@"title"];
        if([typ isEqualToString:@"Titel"])
        navitem.title=(NSString*)[[settings objectAtIndex:i ] objectForKey:@"title"];
    }
    //[[tutorials ] objectForKey:@"title"]
    [myTableView reloadData];
}

有人有想法吗？

Answer 1

您应该尝试使用数据初始化解析器。

使用NSURLRequest和NSURLConnection获取您的数据：

NSURL *xmlURL=[NSURL URLWithString:URL];
NSURLRequest *request = [NSURLRequest requestWithURL:xmlURL cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:0.0f];
xmlParser =[[NSXMLParser alloc] initWithData:[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
//etc.

Answer 2

这是一些代码（用xml解析无法避免）

但是，从您的问题看来，xml解析没有问题。

那么，关注与Timer相关的代码呢？也许在实际获取新URL时添加一些日志？只是为了确保你收到新的请求???

XMLParser Iphone设备问题

2 个答案: