ios - 在 Swift 中调用 webAPI & fatal error : dictionary literal contains duplicate keys

Question

我同时使用了 swift 和 Objective-C 来调用 API 及其参数，我在 Objective C 中成功完成，但我在 Swift 中遇到了一个问题，无法使用它的参数调用 API。

我在两个参数中使用了相同的 key ，即“密码”。它在 Swift 中不工作，但在 Objective C 中工作正常。

请指导我并更新我的 Swift 代码。

谢谢

Swift 代码

var params: [String: String] = ["FirstName":name, "ContactNumber":contact, "Email":email, "password": password,"password":repassword,"Rd_UserType":type]


    var request = NSMutableURLRequest(URL: NSURL(string: "http://local.in/api/AccountApi")!)
    var session = NSURLSession.sharedSession()
    request.HTTPMethod = "POST"

    var err: NSError?
    request.HTTPBody = NSJSONSerialization.dataWithJSONObject(params, options: nil, error: &err)
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue("application/json", forHTTPHeaderField: "Accept")

var task = session.dataTaskWithRequest(request, completionHandler: {data, response, error -> Void in
        println("Response: \(response)")

错误

fatal error: dictionary literal contains duplicate keys

Objective C 代码运行正常。

Objective-C 代码

        NSString *post =[[NSString alloc] initWithFormat:@"FirstName=%@&ContactNumber=%@&Email=%@&password=%@&password=%@&Rd_UserType=%@",Name.text,ContactNumber.text,EmailAddress.text,Password.text,ReTypePassword.text,type];


        NSLog(@"PostData: %@",post);

        NSURL *url=[NSURL URLWithString:@"http://local.in/api/AccountApi"];



        NSLog(@"%@",url);


        NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];

        NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
        [request setURL:url];
        [request setHTTPMethod:@"POST"];
        [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
        [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
        [request setHTTPBody:postData];

        //[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[url host]];

        NSError *error = [[NSError alloc] init];
        NSHTTPURLResponse *response = nil;
        NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

        NSLog(@"Response code: %ld", (long)[response statusCode]);

        if ([response statusCode] >= 200 && [response statusCode] < 300)
        {
            NSString *responseData = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
            NSLog(@"Response ==> %@", responseData);
        }

Answer 1

您的 Swift 代码与 Obj-C 代码根本不同。 swift 等价物 到

NSString *post =[[NSString alloc] initWithFormat:@"FirstName=%@&ContactNumber=%@&Email=%@&password=%@&password=%@&Rd_UserType=%@",Name.text,ContactNumber.text,EmailAddress.text,Password.text,ReTypePassword.text,type];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

会是这样的

let post = "FirstName=\(Name.text)&ContactNumber=\(ContactNumber.text)&..."
let postData = post.dataUsingEncoding(NSASCIIStringEncoding, allowLossyConversion: true)!
let postLength = "\(postData.length)"

您正在创建一个 JSON 字典作为发布数据。失败是因为 字典不能有同一个键的两个值。 JSON 也可能不是 服务器期望什么。