NSData需要更新

Question

我使用hpple解析HTML。所以现在我想让我的文本在用户触摸下一个按钮时进行更新。我的代码看起来是这样的

NSURL *ur = [NSURL URLWithString:[NSString stringWithFormat:@"%@",url.text]]; 
NSData *htmlData = [NSData dataWithContentsOfURL: ur]; 
TFHpple *xpathParser = [[TFHpple alloc] initWithHTMLData:htmlData];  
NSArray *elements = [xpathParser search:@"//table[1]/tr[2]/td[2]/a/text()"]; // get the page title 
TFHppleElement *element = [elements objectAtIndex:0]; 
NSString *h3Tag = [element content]; 
mi.text = h3Tag; 
NSLog(@"%@",h3Tag); 
[xpathParser release]; 

让我感到一种新的iPhone应用程序的开发和相当新的节目。所以在这里，我认为NSData需要更新。当用户触摸下一个按钮时，url也会发生变化。等等，任何帮助将不胜感激

感谢

图莎尔

Answer 1

NSMutableString *tempString = [[NSMutableString alloc] initWithFormat:@"%@",url.text]; 

NSURL *ur =[[NSURL alloc] initWithString:tempString]; 
[tempString release]; 

NSData *htmlData = [[NSData alloc]initWithContentsOfURL:ur]; 
TFHpple *xpathParser = [[TFHpple alloc] initWithHTMLData:htmlData]; 
[ur release]; 
[htmlData release]; 
NSArray *elements = [xpathParser search:@"//table[1]/tr[2]/td[2]/a/text()"]; // get the page title 
TFHppleElement *element = [elements objectAtIndex:0]; 
NSString *h3Tag = [element content]; 
mi.text = h3Tag; 
NSLog(@"%@",h3Tag); 
[xpathParser release]; 

试试这个代码。

谢谢。