iPhone - Http Post：發送一個值到網絡xml

Question

我知道有很多關於這個問題，但沒有人似乎爲我想做的事情工作。我想改變一個變量的值讓我們說，我有這個文件：

</Courbe> 
<tempset>140</tempset> 
</Courbe> 

我希望我的HTTP POST請求更改此值。我該怎麼做呢？

我已經嘗試過這樣的事情：

- (IBAction)changeTemp:(id)sender 
{ 
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL  URLWithString:@"http://207.134.145.16:50001/Courbe.xml"]]; 
[request setHTTPMethod:@"POST"]; 
[request setValue:@"text/xml" forHTTPHeaderField:@"Content-type"]; 

NSString *xmlString = @"<tempset>137</tempset>"; 

[[NSURLConnection alloc] initWithRequest:request delegate:self]; 
} 

是不是這樣呢？謝謝你的幫助！

Answer 1

網址編碼的xmlString，則：

NSData *postData = [xmlString dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; 
[request setHTTPBody:postData]; 
[request setValue:[NSString stringWithFormat:@"%d", [postData length]] forHTTPHeaderField:@"Content-Length"]; 
[request setValue:@"text/xml" forHTTPHeaderField:@"Content-Type"]; 

要發送，使用這樣的：

[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {}]; 

此前的iOS5，您可以異步發送這種方式：

// make the request and an NSURLConnection with a delegate 
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]]; 
[[[NSURLConnection alloc] initWithRequest:request delegate:self] autorelease]; 

// create a property to hold the response data, then implement the delegate methods 
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { 
    responseData = [[NSMutableData alloc] init]; 
} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { 
    [responseData appendData:data]; 
} 

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { 
    [responseData release]; 
    [textView setString:@"Unable to fetch data"]; 
} 

- (void)connectionDidFinishLoading:(NSURLConnection *)connection { 
    NSString *responseString = [[[NSString alloc] initWithData:responseData encoding: NSASCIIStringEncoding] autorelease]; 
}