Question

我正在尝试使用newTBXMLWithURL方法加载xml数据，一旦成功块返回xml，我试图使用委托调度它，以便控制器接收NSMutableArray个记录，但我必须做错了我在控制台中收到一条错误，上面写着“PROGRAM RECEIVED EXC_BAD_ACCESS”我不确定我哪里出错了。代码见下方

#import "XmlParser.h"
#import "TBXML+HTTP.h"
#import "NewsObject.h"

@implementation XmlParser
@synthesize  delegate = _delegate;

- (void)GetNewsList
{

    TBXMLSuccessBlock s = ^(TBXML *tbxml) {
        NSMutableArray *arrayOfNews;

        TBXMLElement *root = tbxml.rootXMLElement;

        TBXMLElement *newsListElement = [TBXML childElementNamed:@"NewsList" parentElement:root];

        TBXMLElement *newsElement = [TBXML childElementNamed:@"News" parentElement:newsListElement];

        while(newsElement !=nil){

            NewsObject *news = [[NewsObject alloc]init];

            news.headLine = [TBXML textForElement: newsElement ->firstChild];
            news.description = [TBXML textForElement:newsElement ->firstChild->nextSibling];
            news.imageUrl = [TBXML textForElement:newsElement->firstChild->nextSibling->nextSibling];

            if(arrayOfNews==nil)
                arrayOfNews = [NSMutableArray arrayWithObject:news];
            else
                [arrayOfNews addObject:news];

            newsElement = newsElement ->nextSibling;
        }

        [self.delegate XmlParser:self feedReady:arrayOfNews];
    };

    TBXMLFailureBlock f = ^(TBXML *tbxml, NSError *error) {
        NSLog(@"nay");
    };


    [TBXML newTBXMLWithURL:[NSURL URLWithString:@"url"]
                   success: s
                   failure: f];

}
@end

输入样本：

<xmlData>
<NewsList>
<News newsId="1" providerId="1" articleId="95020" sportId="6" sportName="RBL">
<Headline>Matai signs on with Manly</Headline>
<Description>
Manly has retained another one of its premiership stars with Steve Matai committing to the Sea Eagles until the end of the 2015 season.
</Description>
<Image>
http:google.com/All.png
</Image>
</News>
<News newsId="2" providerId="1" articleId="95019" sportId="7" sportName="RBU">
<Headline>Reds lose Lucas for Brumbies clash</Headline>
<Description>
Queensland has lost key utility back Ben Lucas to injury on the eve of Saturday night's vital match with the Brumbies at Canberra Stadium.
</Description>
<Image>
http:google.com/All.png
</Image>
</News>
</NewsList>
<xmlData>

Answer 1

感谢您告知我们实际的错误消息。这个错误或警告没有一个原因。

另外，你使用ARC还是忘了自动发布这些东西？您使用的是哪个Xcode版本和编译器？所有这些细节都很重要。

我会说你可以解决这个问题，避免阻止self在块内：

__block id _self = self;
TBXMLSuccessBlock s = ^(TBXML *tbxml) {
    /* use _self inside the block, not self */
};

请参阅https://stackoverflow.com/a/7854315/143097。

上一个回答：

您似乎在调用一个不存在的方法：newTBXMLWithURL:success:failure:。至少在我的TBXML版本中，它被称为：tbxmlWithURL:success:failure:。

我打赌错误信息中的某处有一个提示，不是吗？

TBXML阻止iOS

1 个答案: