iPhone TBXML -通过响应循环

Question

循环遍历所有XML项并将它们作为数组分配给Cell.text的最佳方法是什么？

-(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;

}

谢谢

汤姆

Answer 1

首先，你真的不应该在tableView:cellForRowAtIndexPath:中下载文件的内容。该方法为每个单元格调用一次:最终将多次下载xml文件。

TBXML不支持XPath查询，因此您必须遍历结果。就像这样

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);
}

然后将标题缓冲区存储在一个类变量(比如cellTitles)和tableView:cellForRowAtIndexPath:中

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