RaptureXML有点慢

问题描述

我最近已经从TBXML切换到RaptureXML，尽管提取信息要容易得多，但是当我点击包含xml表格视图的标签栏按钮时，会有明显的延迟.

I've recently switched from TBXML to RaptureXML, and even though pulling in information is much easier, there is a noticeable delay when I tap the tab bar button containing my xml table view.

在我的viewDidLoad方法中，我有以下内容"

In my viewDidLoad method I have the following"

events = [[NSMutableArray alloc] init];

[self loadURL];

我的loadURL方法如下:

And my loadURL method is the following:

- (void)loadURL {

RXMLElement *rootXML = [RXMLElement elementFromURL:[NSURL URLWithString:@"http://api.somexml.com/xml"]];

[rootXML iterateWithRootXPath:@"//event" usingBlock:^(RXMLElement *event) {
    [events addObject:[NSArray arrayWithObjects:
                       [event attribute:@"uri"],
                       [event attribute:@"displayName"],
                       [event attribute:@"type"],
                       nil]];  
}];

[rootXML iterateWithRootXPath:@"//location" usingBlock: ^(RXMLElement *location) {
    [events addObject:[NSArray arrayWithObjects:
                       [location attribute:@"city"],
                       [location attribute:@"lat"],
                       [location attribute:@"lng"],
                       nil]]; 
}];

[rootXML iterateWithRootXPath:@"//start" usingBlock:^(RXMLElement *start) {
    [events addObject:[NSArray arrayWithObjects:
                       [start attribute:@"time"],
                       [start attribute:@"date"],
                       nil]]; 
}];



}

我可以做些什么来加快速度吗?另外，当我将行数分配为[事件数]时，我应该只得到6时得到19行.

Is there something I can do to speed it up? Also when I assign my row count as [events count] I'm getting 19 rows when I should only get 6. Please help.

推荐答案

直到正确为止.您需要在后台线程上进行解析.请执行以下操作:

Till is on the right track. You need to parse on a background thread. Do something like the following:

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    [self loadURL];

    dispatch_async(dispatch_get_main_queue(), ^{
        [tableView reloadData];
    });
});

您会注意到我正在主线程上重新加载tableview.在后台线程上更新接口元素有点不可.

You'll notice that I'm reloading the tableview on the main thread. Updating interface elements on a background thread is a bit no-no.

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