如何在Swift中调用Web服务？

Question

如何在Swift中调用RESTful Web服务？在Objective C中,我使用了以下代码,但未能找到有关如何在swift中执行相同操作的详细信息.

- (IBAction)fetchData;
{
NSURL *url = [NSURL URLWithString:@"http://myrestservice"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request
                                   queue:[NSOperationQueue mainQueue]
                       completionHandler:^(NSURLResponse *response,
                                           NSData *data, NSError *connectionError)
 {
     if (data.length > 0 && connectionError == nil)
     {
         NSDictionary *response = [NSJSONSerialization JSONObjectWithData:data
                                                                  options:0
                                                                    error:NULL];
         self.content.text = [[response objectForKey:@"text"] stringValue];
     }
 }];

}

Answer 1

好吧,如果你只是想从Objective-C代码直接转换到Swift,它看起来就像下面那样.但是,您可能希望观看并阅读上面的链接,以了解如何在Swift中更好地编写此代码.

    let url = NSURL(string: "http://myrestservice")
    let theRequest = NSURLRequest(URL: url)

    NSURLConnection.sendAsynchronousRequest(theRequest, queue: nil, completionHandler: {(response: NSURLResponse!, data: NSData!, error: NSError!) -> Void in
        if data.length > 0 && error == nil {
            let response : AnyObject! = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.fromMask(0), error: nil)
        }
    })