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我正在加载一个XML 文件，其中包含大约 600 个小数据集，大约 10,000 行。数据被用作地图上的注释点。我正在使用该TouchXML库来处理 XML。这是我的代码：

NSData *XMLData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://skidmoreapps.com/darksky/fetch_info.php"]];
CXMLDocument *doc = [[[CXMLDocument alloc] initWithData:XMLData options:0 error:nil] autorelease];
NSArray *nodes = [doc nodesForXPath:@"//site" error:nil];

for (CXMLElement *node in nodes)
{
    ObservationSite *site = [ObservationSite mapAnnotation];
    [site setCoordinate:CLLocationCoordinate2DMake([[[[node elementsForName:@"lat"] objectAtIndex:0] stringValue] floatValue], [[[[node elementsForName:@"lng"] objectAtIndex:0] stringValue] floatValue])];
    [site setTitle:[[[node elementsForName:@"name"] objectAtIndex:0] stringValue]];
    [site setAddress:[[[node elementsForName:@"address"] objectAtIndex:0] stringValue]];
    [site setUrl:[[[node elementsForName:@"name_l"] objectAtIndex:0] stringValue]];
    [site setAffiliation:[[[node elementsForName:@"affil"] objectAtIndex:0] stringValue]];
    [site setAffiliationUrl:[[[node elementsForName:@"affil_l"] objectAtIndex:0] stringValue]];
    [site setOwner:[[[node elementsForName:@"owner"] objectAtIndex:0] stringValue]];
    [site setFee:[[[node elementsForName:@"fee"] objectAtIndex:0] stringValue]];
    [site setAccess:[[[node elementsForName:@"access"] objectAtIndex:0] stringValue]];
    [site setSky:[[[node elementsForName:@"sky"] objectAtIndex:0] stringValue]];
    [site setWeatherUrl:[[[node elementsForName:@"wx_l"] objectAtIndex:0] stringValue]];
    [site setPads:[[[node elementsForName:@"pads"] objectAtIndex:0] stringValue]];
    [site setParking:[[[node elementsForName:@"parking"] objectAtIndex:0] stringValue]];
    [site setRestrooms:[[[node elementsForName:@"b_rooms"] objectAtIndex:0] stringValue]];
    [site setSleep:[[[node elementsForName:@"sleep"] objectAtIndex:0] stringValue]];
    [site setNotes:[[[node elementsForName:@"notes"] objectAtIndex:0] stringValue]];

    [map addAnnotation:site];
}

下载 XML 文件后，它会因以下错误而崩溃：

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1 回答 1

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从屏幕截图中我可以看到正在mutateError发生。如果您修改要枚举的内容，这可能会在快速枚举期间发生。[self children]在快速枚举运行的同时，是否有任何事情会修改集合？例如，是否有多个线程在做事？

如果您继续调试器并允许完全抛出异常，您会在控制台上看到什么？

顺便说一句，您的 .php 脚本似乎返回了一个无效的 XML 文档——就我的浏览器而言，某些字符不是有效的 UTF8。也许不是问题，但值得修复和排除。

于 2011-03-13T21:47:21.330 回答