Question

我是Swift的新手，在我的应用中我正在尝试发出POST请求。

Url如下所示

https://example.com/login/auto/uid/5465656/hash/9530cf040a49fba786100a44f913ad25/preset/986tzugh76rtzu00fg

以下是我的代码

    let parameters = ["/uid/": "12234353", "/hash/": "9530cf040a49fba786100a44f913ad25", "/preset/":"986tzugh76rtzu00fg"]as Dictionary<String, String>


    guard let url = URL(string: "https://example.com/login/auto/") else { return }
    var request = URLRequest(url: url)
    request.httpMethod = "POST"
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    guard let httpBody = try? JSONSerialization.data(withJSONObject: parameters, options: []) else { return }
    request.httpBody = httpBody

    let session = URLSession.shared
    session.dataTask(with: request) { (data, response, error) in
        if let response = response {
            print(response)
        }

        if let data = data {
            do {
                let json = try JSONSerialization.jsonObject(with: data, options: [])
                print(json)
            } catch {
                print(error)
            }
        }

    }.resume()

我收到以下错误

Error Domain = NSCocoaErrorDomain Code = 3840“JSON文本没有以数组或对象开头，并且选项允许未设置片段。”

任何人都可以帮我解决我在代码中做错的事情，恐怕我没有正确发送多个参数。

如果可能的话，我将通过示例感谢答案。

Answer 1

此错误可能是因为参数中存在重复项。字典键应该是唯一的。

在let parameters = ["/uid/": "12234353", "/hash/": "9530cf040a49fba786100a44f913ad25", "/hash/":986tzugh76rtzu00fg]as Dictionary<String, String>中，您有"\hash\"的2个实例。另外，"/hash/":986tzugh76rtzu00fg]as的类型可能会给您一个错误，因为它应该是String。

试试这段代码：

let parameters = ["/uid/": "12234353", "/hash/": "9530cf040a49fba786100a44f913ad25", "/preset/":"986tzugh76rtzu00fg"] as Dictionary<String, String>

guard let url = URL(string: "https://example.com/login/auto/") else { return }
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
guard let httpBody = try? JSONSerialization.data(withJSONObject: parameters, options: []) else { return }
request.httpBody = httpBody

let session = URLSession.shared
session.dataTask(with: request) { (data, response, error) in
    if let response = response {
        print(response)
    }

    if let data = data {
        do {
            let json = try JSONSerialization.jsonObject(with: data, options: [])
            print(json)
        } catch {
            print(error)
        }
    }

    }.resume()

Answer 2

确保正确设置了httpBody。使用上面的确切代码，我得到3个错误，我需要修复。

参数中的第二个哈希未用双引号括起来
字典中不能有两个相同的键。所以我不得不删除第二个哈希。
你逃跑是错误的，“/对我不起作用。我删除了所有斜线。

一旦我完成了这个，我得到了这个作为httpBody，它应该工作。

let parameters = ["uid": "12234353", "hash": "9530cf040a49fba786100a44f913ad25"] as Dictionary<String, String>

let httpBody = try? JSONSerialization.data(withJSONObject: parameters, options: [])

let string = String(data: httpBody!, encoding: String.Encoding.utf8)
print(string)

Optional("{\"hash\":\"9530cf040a49fba786100a44f913ad25\",\"uid\":\"12234353\"}")

更新根据以下对话。用户需要使用这些参数生成URL而不是使用标题

let baseUrl = "https://example.com/login/auto"

let parameters = ["uid": "12234353", "hash": "9530cf040a49fba786100a44f913ad25"] as Dictionary<String, String>

var queryString = ""
for (key, value) in parameters {
    queryString += "/\(key)/\(value)"
}
print(queryString)
// output /hash/9530cf040a49fba786100a44f913ad25/uid/12234353

print("\(baseUrl)\(queryString)")
// output https://example.com/login/auto/hash/9530cf040a49fba786100a44f913ad25/uid/12234353

<强>更新

要使参数动态化，只需创建一个空字典并根据需要添加键和值

let baseUrl = "https://example.com/login/auto"

var parameters = [String:String]()
parameters["uid"] = "12234353"
parameters["hash"] = "9530cf040a49fba786100a44f913ad25"

var queryString = ""
for (key, value) in parameters {
    queryString += "/\(key)/\(value)"
}

let urlString = "\(baseUrl)\(queryString)"
let url = URL(string: urlString)

Http post请求swift 3中的多个参数

2 个答案: