iphone - TBXML 解析问题，而值无法在 UILabel 中获取

Question

在我的应用程序中，我正在使用 TBXML 解析器，我需要从 xml 文件中获取一个值并将其打印在标签上...这是我在服务器中的 xml 文件

 <gold>
 <price>
 <title>22 K Gold</title>
 </price>
 <price>
 <title>24 K Gold</title>
 </price>
 </gold>

任何我的 Viewcontroller.h 看起来像

#import <UIKit/UIKit.h>
#import "TBXML.h"

 @interface ViewController : UIViewController{

IBOutlet UILabel *lab;
TBXML *tbxml;
}



@end

我的 Viewcontrooler.m 看起来像

 - (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSData *xmlData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:@"http://www.abcde.com/sample.xml"]];
 tbxml = [[TBXML alloc]initWithXMLData:xmlData];


TBXMLElement * root = tbxml.rootXMLElement;

if (root)
{
    TBXMLElement * elem_PLANT = [TBXML childElementNamed:@"price" parentElement:root];
    while (elem_PLANT !=nil)
    {
        TBXMLElement * elem_BOTANICAL = [TBXML childElementNamed:@"title" parentElement:elem_PLANT];
        NSString *botanicalName = [TBXML textForElement:elem_BOTANICAL];
        lab.text=[NSString stringWithFormat:@"re %@", botanicalName];

        elem_PLANT = [TBXML nextSiblingNamed:@"price" searchFromElement:elem_PLANT]; 

        elem_BOTANICAL = [TBXML childElementNamed:@"title" parentElement:elem_PLANT]; 

        botanicalName = [TBXML textForElement:elem_BOTANICAL];
        lab1.text=[NSString stringWithFormat:@"re %@", botanicalName];
    }
}

}

我收到 BAD_ACCESS 线程。我是否遗漏了任何东西...请帮助...

Answer 1

lab.text=[NSString stringWithFormat:@"re %@",elem_BOTANICAL];

编辑 1.0:

lab.text=[NSString stringWithFormat:@"re %@", botanicalName];

编辑 2.0:

lab.text=[NSString stringWithFormat:@"re %@", botanicalName];

NSString *plantName = [TBXML textForElement: elem_PLANT];

lab1.text=[NSString stringWithFormat:@"re %@", plantName];