iPhone TBXML-通过响应循环

Question

What's the best way to loop through this to get all the XML items out and assign them to the Cell.text as an array?

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *Cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (Cell == nil) {
        Cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
    }


    TBXML * XML = [[TBXML tbxmlWithURL:[NSURL URLWithString:@"http://www.tomstest.info/ios/results.xml"]] retain];

    TBXMLElement *rootXML = XML.rootXMLElement;
    TBXMLElement *results = [TBXML childElementNamed:@"location" parentElement:rootXML];  
    TBXMLElement *WOEID = [TBXML childElementNamed:@"CompanyName" parentElement:results]; 
    NSString *woeid = [TBXML textForElement:WOEID];


    Cell.text = woeid;
    return Cell;

}

Thanks

Tom

Answer 1

First, you really shouldn't download the content of your file in tableView:cellForRowAtIndexPath: . The method is called once for each cell: you would end up downloading the xml file many times.

TBXML does not support XPath queries, so you'll have to loop through the results. Something like

NSMutableArray *cellTitlesBuffer = [NSMutableArray array];
TBXMLElement *locationNode = [TBXML childElementNamed:@"location" parentElement:rootXML]; 
if (locationNode) {
    NSString *cellTitle = nil;
    do {
        TBXMLElement *woeidNode = [TBXML childElementNamed:@"CompanyName" parentElement:locationNode];
        [cellTitlesBuffer addObject:[TBXML textForElement:woeidNode]];
    } while (locationNode = locationNode->nextSibling);
}

Then store the titles buffer in a class variable (say cellTitles) and in tableView:cellForRowAtIndexPath:

Cell.textLabel.text = [cellTitles objectAtIndex:indexPath.row];