如何在 Swift 的 JSON POST 方法中传递键值参数?

Question

这是 API http://itaag-env-1.ap-south-1.elasticbeanstalk.com/filter/taggedusers/

其参数："联系人列表" ： ["5987606147"， "6179987671"， "5082508888"]

其标头： ["deviceid"： "584D97F-761A-4C24-8C4B-C145A8B8BD75"， "userType"： "personal"， "key"： "9609cc826b0d472faf9967370c095c21"]

在我的代码中，如果我放置断点，那么filtertaggedUser()正在调用，但我无法进入completionHandler访问不会进入内部dataTask

访问转到其他部分为什么？ API 正在工作。

我正在尝试在 URL 字符串中传递参数键值，如下所示

let urlStr  = "http://itaag-env-1.ap-south-1.elasticbeanstalk.com/filter/taggedusers/?contactsList=" + "8908908900"

这是正确的方法吗？

上述 API 的代码：

func filtertaggedUser() {
print("inside filter taggedusers")
let headers = ["deviceid": "584D97F-761A-4C24-8C4B-C145A8B8BD75", "userType": "personal", "key": "9609cc826b0d472faf9967370c095c21"]
let urlStr  = "http://itaag-env-1.ap-south-1.elasticbeanstalk.com/filter/taggedusers/?contactsList=" + "8908908900"
let request = NSMutableURLRequest(url: NSURL(string:urlStr)! as URL,cachePolicy: .useProtocolCachePolicy,timeoutInterval: 10.0)
request.httpMethod          = "POST"
request.allHTTPHeaderFields = headers
let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
// access not coming here
let httpResponse = response as? HTTPURLResponse
if httpResponse!.statusCode == 200 {
print("filter taggedusers inside")
do {
print("filter taggedusers inside do")
let jsonObject  = try JSONSerialization.jsonObject(with: data!, options: .mutableLeaves) as! [String :AnyObject]
print("filter taggedusers (jsonObject)")

} catch { print(error.localizedDescription) }
} else { Constants.showAlertView(alertViewTitle: "", Message: "Something went wrong, Please try again", on: self) }
})
dataTask.resume()
}

输出：

邮递员输出

邮递员身体

为什么没有响应，我哪里出错了，请帮我写代码。

Answer 1

我们可以像下面这样调用Post请求 API，

func getPostString(params:[String:Any]) -> String
{
var data = [String]()
for(key, value) in params
{
data.append(key + "=(value)")
}
print(data.map { String($0) }.joined(separator: "&"))
return data.map { String($0) }.joined(separator: "&")
}
func callPostApi(){
let url = URL(string: "http://itaag-env-1.ap-south-1.elasticbeanstalk.com/filter/taggedusers/")
guard let requestUrl = url else { fatalError() }
var request = URLRequest(url: requestUrl)
request.httpMethod = "POST"
request.setValue("584D97F-761A-4C24-8C4B-C145A8B8BD75", forHTTPHeaderField: "deviceid")
request.setValue("9609cc826b0d472faf9967370c095c21", forHTTPHeaderField: "key")
request.setValue("personal", forHTTPHeaderField: "userType")

let parameters = getPostString(params:   ["contactsList":["8908908900"]])
request.httpBody = parameters.data(using: .utf8)
// Perform HTTP Request
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
let httpResponse = response as? HTTPURLResponse
print(httpResponse!.statusCode)
// Check for Error
if let error = error {
print("Error took place (error)")
return
}
// Convert HTTP Response Data to a String
if let data = data, let dataString = String(data: data, encoding: .utf8) {
print("Response data string:n (dataString)")
}
}
task.resume()
}

输出：

{"8908908900":{"userId":"9609cc826b0d472faf9967370c095c21","userName":"Satish Madhavarapu","profilePic":null,"oniTaag":true,"tagged":false,"userType":"personal"}}