我正在从rss feed中读取xml图像并在UITable视图中解析它。一切正常，但在表格视图中加载图像内容需要时间。屏幕仍然冻结。我正在使用NSXMLParser来解析图像。你能帮助我吗，我真的很有意思。以下是代码。
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI: (NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
//NSLog(@"found this element: %@", elementName);
currentElement = [elementName copy];
currentElement1=[attributeDict copy];
if ([elementName isEqualToString:@"item"]) {
// clear out our story item caches...
item = [[NSMutableDictionary alloc] init];
currentTitle = [[NSMutableString alloc] init];
currentDate = [[NSMutableString alloc] init];
currentSummary = [[NSMutableString alloc] init];
currentLink = [[NSMutableString alloc] init];
currentString=[[NSMutableString alloc] init];
//currentImage = [[NSMutableString alloc] init];
currentContent=[[NSMutableString alloc]init];
}
if ([attributeDict objectForKey:@"url"])
{
currentString=[attributeDict objectForKey:@"url"];
// NSLog(@"what is my current string:%@",currentString);
[item setObject:currentString forKey:@"url"];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
if ([elementName isEqualToString:@"item"]) {
[item setObject:currentTitle forKey:@"title"];
[item setObject:currentLink forKey:@"link"];
[item setObject:currentSummary forKey:@"description"];
[item setObject:currentContent forKey:@"content:encoded"];
[item setObject:currentDate forKey:@"pubDate"];
[stories addObject:[item copy]];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
//NSLog(@"found characters: %@", string);
// save the characters for the current item...///////////element
if ([currentElement isEqualToString:@"title"]) {
[currentTitle appendString:string];
} else if ([currentElement isEqualToString:@"link"]) {
[currentLink appendString:string];
} else if ([currentElement isEqualToString:@"description"]) {
[currentSummary appendString:string];
} else if ([currentElement isEqualToString:@"pubDate"]) {
[currentDate appendString:string];
}
else if ([currentElement isEqualToString:@"content:encoded"]) {
[currentSummary appendString:string];
}
}
NSString *imagefile1 = [[stories objectAtIndex:indexPath.row]objectForKey:@"url"];
NSString *escapedURL=[imagefile1 stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
UIImage *image1 = [[UIImage alloc]initWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:escapedURL]]];
cell.imageView.image=image1;
[image1 release];
cell.textLabel.backgroundColor=[UIColor clearColor];
cell.textLabel.numberOfLines=2;
cell.textLabel.text=[[stories objectAtIndex:indexPath.row] objectForKey: @"title"];
cell.detailTextLabel.backgroundColor=[UIColor clearColor];
cell.detailTextLabel.numberOfLines=3;
cell.detailTextLabel.text=[[stories objectAtIndex:indexPath.row] objectForKey: @"pubDate"];