stringWithContentsOfURL折舊，有助於更新到4.2？

Question

你好 誰能幫我更新此snippent到iOS 4.2：

-(void) whatever{ 
NSData *htmlData = [[NSString stringWithContentsOfURL:[NSURL URLWithString: @"http://www.objectgraph.com/contact.html"]] dataUsingEncoding:NSUTF8StringEncoding]; 
TFHpple *xpathParser = [[TFHpple alloc] initWithHTMLData:htmlData]; 
NSArray *elements = [xpathParser search:@"//h3"]; // get the page title - this is xpath notation 
TFHppleElement *element = [elements objectAtIndex:0]; 
NSString *myTitle = [element content]; 
NSLog(myTitle); 
[xpathParser release]; 
[htmlData release];} 

需要更新是下面的只是一部分，你可以用途不同忘記休息：

NSData *htmlData = [[NSString stringWithContentsOfURL:[NSURL URLWithString: @"http://www.objectgraph.com/contact.html"]] dataUsingEncoding:NSUTF8StringEncoding]; 

「stringWithContentsOfURL」已deprechiated所以什麼是更新的版本？

感謝

Answer 1

您應該使用

+ (id)stringWithContentsOfURL:(NSURL *)url encoding:(NSStringEncoding)enc error:(NSError **)error 

而且使用它這樣。更換

NSData *htmlData = [[NSString stringWithContentsOfURL:[NSURL URLWithString: @"http://www.objectgraph.com/contact.html"]] dataUsingEncoding:NSUTF8StringEncoding]; 

通過

NSData *htmlData = [[NSString stringWithContentsOfURL:[NSURL URLWithString: @"http://www.objectgraph.com/contact.html"]] encoding:NSUTF8StringEncoding error:nil];