ios 如何使用swift语言创建json数据并将其发送到服务器
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How to create and send the json data to server using swift language
提问by Uday
I'm new to IOS development and I have started with the swift language.
我是 IOS 开发的新手，我已经开始使用 swift 语言。
I'm trying to get the value from two text fields and convert those two text fields into json and send that json to the server receive.php.
我试图从两个文本字段中获取值并将这两个文本字段转换为 json 并将该 json 发送到服务器 receive.php。
lets concider that tow text fields are - name - pass
让我们考虑两个文本字段是 - 名称 - 通过
how do i create a Json & send that to server when a button is clicked ?
我如何创建一个 Json 并在单击按钮时将其发送到服务器？
回答by Suhit Patil
By using http POST method with NSURLSession. Let's say you are calling submitAction method on the press of the login button
通过使用带有 NSURLSession 的 http POST 方法。假设您在按下登录按钮时调用 submitAction 方法
Swift 3
斯威夫特 3
@IBAction func submitAction(_ sender: UIButton) {
//declare parameter as a dictionary which contains string as key and value combination. considering inputs are valid
let parameters: [String: String] = ["name": nametextField.text, "password": passwordTextField.text]
//create the url with URL
let url = URL(string: "http://myServerName.com/api")! //change the url
//create the session object
let session = URLSession.shared
//now create the URLRequest object using the url object
var request = URLRequest(url: url)
request.httpMethod = "POST" //set http method as POST
do {
request.httpBody = try JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted) // pass dictionary to nsdata object and set it as request body
} catch let error {
print(error.localizedDescription)
}
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
//create dataTask using the session object to send data to the server
let task = session.dataTask(with: request, completionHandler: { data, response, error in
guard error == nil else {
return
}
guard let data = data else {
return
}
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
print(json)
// handle json...
}
} catch let error {
print(error.localizedDescription)
}
})
task.resume()
}
回答by Kingsley Mitchell
Swift 3,Swift 4 The method above is very in-efficient, use alamofire instead
Swift 3,Swift 4 上面的方法效率很低，改用alamofire
https://github.com/Alamofire/Alamofire
https://github.com/Alamofire/Alamofire
get email and passwoord from textfield
从文本字段获取电子邮件和密码
@IBAction func submitAction(sender: AnyObject) {
let email= emailfield.text
let password= emailfield.text
let parameters: Parameters = [
"email": email,
"password": password
]
Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters) }
or here is an example
或者这里是一个例子
let parameters: Parameters = [
"foo": "bar",
"baz": ["a", 1],
"qux": [
"x": 1,
"y": 2,
"z": 3
]
]
// All three of these calls are equivalent
Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters)
Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters, encoding: URLEncoding.default)
Alamofire.request("https://httpbin.org/post", method: .post, parameters: parameters, encoding: URLEncoding.httpBody)
// HTTP body: foo=bar&baz[]=a&baz[]=1&qux[x]=1&qux[y]=2&qux[z]=3
