Ios 在Swift中调用restapi
我正在尝试使用Swift调用restapi,并且尝试了很多教程,但都没有找到答案。要么是因为我不知道如何将所有Obj-C翻译成Swift,要么是因为有一半的方法不推荐使用。有人知道如何调用并解析返回的JSON数据吗?您可以这样做:Ios 在Swift中调用restapi,ios,swift,rest,http,restapi,Ios,Swift,Rest,Http,Restapi,我正在尝试使用Swift调用restapi,并且尝试了很多教程,但都没有找到答案。要么是因为我不知道如何将所有Obj-C翻译成Swift,要么是因为有一半的方法不推荐使用。有人知道如何调用并解析返回的JSON数据吗?您可以这样做: var url : String = "http://google.com?test=toto&test2=titi" var request : NSMutableURLRequest = NSMutableURLRequest() request.URL
var url : String = "http://google.com?test=toto&test2=titi"
var request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: url)
request.HTTPMethod = "GET"
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue(), completionHandler:{ (response:NSURLResponse!, data: NSData!, error: NSError!) -> Void in
var error: AutoreleasingUnsafeMutablePointer<NSError?> = nil
let jsonResult: NSDictionary! = NSJSONSerialization.JSONObjectWithData(data, options:NSJSONReadingOptions.MutableContainers, error: error) as? NSDictionary
if (jsonResult != nil) {
// process jsonResult
} else {
// couldn't load JSON, look at error
}
})
var-url:String=”http://google.com?test=toto&test2=titi"
var请求:NSMutableURLRequest=NSMutableURLRequest()
request.URL=NSURL(字符串:URL)
request.HTTPMethod=“GET”
NSURLConnection.sendAsynchronousRequest(请求,队列:NSOperationQueue(),completionHandler:{(响应:NSURLResponse!,数据:NSData!,错误:NSError!)->中无效
var错误:AutoreleasingUnsafeMutablePointer=nil
将jsonResult:NSDictionary!=NSJSONSerialization.JSONObjectWithData(数据,选项:NSJSONReadingOptions.MutableContainers,错误:error)设为?NSDictionary
if(jsonResult!=nil){
//处理jsonResult
}否则{
//无法加载JSON,请查看错误
}
})
编辑:对于对此有问题的人,可能您的JSON流是
数组[],而不是对象{},因此必须将jsonResult更改为
NSArray
而不是NSDictionary
我认为
NSURLSession
api更适合这种情况。因为如果您编写swift代码,您的项目目标至少是iOS 7,iOS 7支持NSURLSession
api。不管怎样,这是代码
let url = "YOUR_URL"
NSURLSession.sharedSession().dataTaskWithURL(NSURL(string: url)) { data, response, error in
// Handle result
}.resume()
为swift 2编辑
let url = NSURL(string: "http://www.test.com")
let task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, error) in
print(NSString(data: data!, encoding: NSUTF8StringEncoding))
}
task.resume()
以下是在swift中使用NSURLSession的RESTAPI请求的完整代码
For GET Request
let configuration = NSURLSessionConfiguration .defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration)
let urlString = NSString(format: "your URL here")
print("get wallet balance url string is \(urlString)")
//let url = NSURL(string: urlString as String)
let request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: NSString(format: "%@", urlString) as String)
request.HTTPMethod = "GET"
request.timeoutInterval = 30
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let dataTask = session.dataTaskWithRequest(request) {
(let data: NSData?, let response: NSURLResponse?, let error: NSError?) -> Void in
// 1: Check HTTP Response for successful GET request
guard let httpResponse = response as? NSHTTPURLResponse, receivedData = data
else {
print("error: not a valid http response")
return
}
switch (httpResponse.statusCode)
{
case 200:
let response = NSString (data: receivedData, encoding: NSUTF8StringEncoding)
print("response is \(response)")
do {
let getResponse = try NSJSONSerialization.JSONObjectWithData(receivedData, options: .AllowFragments)
EZLoadingActivity .hide()
// }
} catch {
print("error serializing JSON: \(error)")
}
break
case 400:
break
default:
print("wallet GET request got response \(httpResponse.statusCode)")
}
}
dataTask.resume()
对于POST请求
let configuration = NSURLSessionConfiguration .defaultSessionConfiguration()
let session = NSURLSession(configuration: configuration)
let params = ["username":bindings .objectForKey("username"), "provider":"walkingcoin", "securityQuestion":securityQuestionField.text!, "securityAnswer":securityAnswerField.text!] as Dictionary<String, AnyObject>
let urlString = NSString(format: “your URL”);
print("url string is \(urlString)")
let request : NSMutableURLRequest = NSMutableURLRequest()
request.URL = NSURL(string: NSString(format: "%@", urlString)as String)
request.HTTPMethod = "POST"
request.timeoutInterval = 30
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(params, options: [])
let dataTask = session.dataTaskWithRequest(request)
{
(let data: NSData?, let response: NSURLResponse?, let error: NSError?) -> Void in
// 1: Check HTTP Response for successful GET request
guard let httpResponse = response as? NSHTTPURLResponse, receivedData = data
else {
print("error: not a valid http response")
return
}
switch (httpResponse.statusCode)
{
case 200:
let response = NSString (data: receivedData, encoding: NSUTF8StringEncoding)
if response == "SUCCESS"
{
}
default:
print("save profile POST request got response \(httpResponse.statusCode)")
}
}
dataTask.resume()
let configuration=NSURLSessionConfiguration.defaultSessionConfiguration()
let session=NSURLSession(配置:配置)
让params=[“username”:bindings.objectForKey(“username”),“provider”:“walkingcoin”,“securityQuestion”:securityQuestionField.text!,“securityAnswer”:securityAnswerField.text!]作为字典
设urlString=NSString(格式:“您的URL”);
打印(“url字符串为\(url字符串)”)
let请求:NSMutableURLRequest=NSMutableURLRequest()
request.URL=NSURL(字符串:NSString(格式:“%@”,urlString)作为字符串)
request.HTTPMethod=“POST”
request.timeoutInterval=30
request.addValue(“应用程序/json”,forHTTPHeaderField:“内容类型”)
request.addValue(“application/json”,forHTTPHeaderField:“Accept”)
request.HTTPBody=试试看!NSJSONSerialization.dataWithJSONObject(参数,选项:[])
让dataTask=session.dataTaskWithRequest(请求)
{
(let data:NSData?,let response:NSURLResponse?,let error:NSError?->Void in
//1:检查HTTP响应以获取成功的GET请求
guard let httpResponse=响应为?NSHTTPURLResponse,receivedData=数据
否则{
打印(“错误:不是有效的http响应”)
返回
}
开关(httpResponse.statusCode)
{
案例200:
let response=NSString(数据:receivedData,编码:NSUTF8StringEncoding)
如果响应==“成功”
{
}
违约:
打印(“保存配置文件后请求得到响应\(httpResponse.statusCode)”)
}
}
dataTask.resume()
我希望它能起作用 如果您使用的是Swift 3,语法会发生变化。这里的示例对我很有用,并且很好地解释了以下步骤: 这是该教程中的代码:
let todoEndpoint: String = "https://jsonplaceholder.typicode.com/todos/1"
guard let url = URL(string: todoEndpoint) else {
print("Error: cannot create URL")
return
}
let urlRequest = URLRequest(url: url)
let task = session.dataTask(with: urlRequest) {
(data, response, error) in
// check for any errors
guard error == nil else {
print("error calling GET on /todos/1")
print(error!)
return
}
// make sure we got data
guard let responseData = data else {
print("Error: did not receive data")
return
}
// parse the result as JSON, since that's what the API provides
do {
guard let todo = try JSONSerialization.jsonObject(with: responseData, options: [])
as? [String: Any] else {
print("error trying to convert data to JSON")
return
}
// now we have the todo
// let's just print it to prove we can access it
print("The todo is: " + todo.description)
// the todo object is a dictionary
// so we just access the title using the "title" key
// so check for a title and print it if we have one
guard let todoTitle = todo["title"] as? String else {
print("Could not get todo title from JSON")
return
}
print("The title is: " + todoTitle)
} catch {
print("error trying to convert data to JSON")
return
}
}
task.resume()
Swift 3.0
let request = NSMutableURLRequest(url: NSURL(string: "http://httpstat.us/200")! as URL)
let session = URLSession.shared
request.httpMethod = "GET"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = session.dataTask(with: request as URLRequest, completionHandler: {data, response, error -> Void in
if error != nil {
print("Error: \(String(describing: error))")
} else {
print("Response: \(String(describing: response))")
}
})
task.resume()
Swift 5&4
let params = ["username":"john", "password":"123456"] as Dictionary<String, String>
var request = URLRequest(url: URL(string: "http://localhost:8080/api/1/login")!)
request.httpMethod = "POST"
request.httpBody = try? JSONSerialization.data(withJSONObject: params, options: [])
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
let session = URLSession.shared
let task = session.dataTask(with: request, completionHandler: { data, response, error -> Void in
print(response!)
do {
let json = try JSONSerialization.jsonObject(with: data!) as! Dictionary<String, AnyObject>
print(json)
} catch {
print("error")
}
})
task.resume()
让params=[“username”:“john”,“password”:“123456”]作为字典
var request=URLRequest(url:url(字符串):http://localhost:8080/api/1/login")!)
request.httpMethod=“POST”
request.httpBody=try?JSONSerialization.data(带jsonObject:params,选项:[]))
request.addValue(“应用程序/json”,forHTTPHeaderField:“内容类型”)
让session=URLSession.shared
让task=session.dataTask(带:request,completionHandler:{data,response,error->Void in)
打印(响应!)
做{
让json=try JSONSerialization.jsonObject(使用:data!)作为!字典
打印(json)
}抓住{
打印(“错误”)
}
})
task.resume()
swift 4
let params = ["username":"john", "password":"123456"] as Dictionary<String, String>
var request = URLRequest(url: URL(string: "http://localhost:8080/api/1/login")!)
request.httpMethod = "POST"
request.httpBody = try? JSONSerialization.data(withJSONObject: params, options: [])
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
let session = URLSession.shared
let task = session.dataTask(with: request, completionHandler: { data, response, error -> Void in
print(response!)
do {
let json = try JSONSerialization.jsonObject(with: data!) as! Dictionary<String, AnyObject>
print(json)
} catch {
print("error")
}
})
task.resume()
在我们的应用程序plz安装pod文件中使用ALAMOFIRE
吊舱“Alamofire”,“~>4.0”
我们可以对Json数据使用API-
然后我们可以为我们的项目创建一个网络类-networkingService.swift
import Foundation
import Alamofire
typealias JSON = [String:Any]
class networkingService{
static let shared = networkingService()
private init() {}
func getPeople(success successblock: @escaping (GetPeopleResponse) -> Void)
{
Alamofire.request("https://swapi.co/api/people/").responseJSON { response in
guard let json = response.result.value as? JSON else {return}
// print(json)
do {
let getPeopleResponse = try GetPeopleResponse(json: json)
successblock(getPeopleResponse)
}catch{}
}
}
func getHomeWorld(homeWorldLink:String,completion: @escaping(String) ->Void){
Alamofire.request(homeWorldLink).responseJSON {(response) in
guard let json = response.result.value as? JSON,
let name = json["name"] as? String
else{return}
completion(name)
}
}
}
然后创建NetworkingError.swift类
import Foundation
enum networkingError : Error{
case badNetworkigStuff
}
import Foundation
struct Person {
private let homeWorldLink : String
let birthyear : String
let gender : String
let haircolor : String
let eyecolor : String
let height : String
let mass : String
let name : String
let skincolor : String
init?(json : JSON) {
guard let birthyear = json["birth_year"] as? String,
let eyecolor = json["eye_color"] as? String,
let gender = json["gender"] as? String,
let haircolor = json["hair_color"] as? String,
let height = json["height"] as? String,
let homeWorldLink = json["homeworld"] as? String,
let mass = json["mass"] as? String,
let name = json["name"] as? String,
let skincolor = json["skin_color"] as? String
else { return nil }
self.homeWorldLink = homeWorldLink
self.birthyear = birthyear
self.gender = gender
self.haircolor = haircolor
self.eyecolor = eyecolor
self.height = height
self.mass = mass
self.name = name
self.skincolor = skincolor
}
func homeWorld(_ completion: @escaping (String) -> Void) {
networkingService.shared.getHomeWorld(homeWorldLink: homeWorldLink){ (homeWorld) in
completion(homeWorld)
}
}
}
import Foundation
struct GetPeopleResponse {
let people : [Person]
init(json :JSON) throws {
guard let results = json["results"] as? [JSON] else { throw networkingError.badNetworkigStuff}
let people = results.map{Person(json: $0)}.flatMap{ $0 }
self.people = people
}
}
import Foundation
class model : NSObject{
var name : String
var descriptionStr: String
init(name : String, descriptionStr: String)
{
self.name = name
self.descriptionStr = descriptionStr
}
然后创建Person.swift类
import Foundation
enum networkingError : Error{
case badNetworkigStuff
}
import Foundation
struct Person {
private let homeWorldLink : String
let birthyear : String
let gender : String
let haircolor : String
let eyecolor : String
let height : String
let mass : String
let name : String
let skincolor : String
init?(json : JSON) {
guard let birthyear = json["birth_year"] as? String,
let eyecolor = json["eye_color"] as? String,
let gender = json["gender"] as? String,
let haircolor = json["hair_color"] as? String,
let height = json["height"] as? String,
let homeWorldLink = json["homeworld"] as? String,
let mass = json["mass"] as? String,
let name = json["name"] as? String,
let skincolor = json["skin_color"] as? String
else { return nil }
self.homeWorldLink = homeWorldLink
self.birthyear = birthyear
self.gender = gender
self.haircolor = haircolor
self.eyecolor = eyecolor
self.height = height
self.mass = mass
self.name = name
self.skincolor = skincolor
}
func homeWorld(_ completion: @escaping (String) -> Void) {
networkingService.shared.getHomeWorld(homeWorldLink: homeWorldLink){ (homeWorld) in
completion(homeWorld)
}
}
}
import Foundation
struct GetPeopleResponse {
let people : [Person]
init(json :JSON) throws {
guard let results = json["results"] as? [JSON] else { throw networkingError.badNetworkigStuff}
let people = results.map{Person(json: $0)}.flatMap{ $0 }
self.people = people
}
}
import Foundation
class model : NSObject{
var name : String
var descriptionStr: String
init(name : String, descriptionStr: String)
{
self.name = name
self.descriptionStr = descriptionStr
}
然后创建DetailVC.swift
import UIKit
class DetailVC: UIViewController {
var person :Person!
@IBOutlet var name: UILabel!
@IBOutlet var birthyear: UILabel!
@IBOutlet var homeworld: UILabel!
@IBOutlet var eyeColor: UILabel!
@IBOutlet var skinColor: UILabel!
@IBOutlet var gender: UILabel!
@IBOutlet var hairColor: UILabel!
@IBOutlet var mass: UILabel!
@IBOutlet var height: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
print(person)
name.text = person.name
birthyear.text = person.birthyear
eyeColor.text = person.eyecolor
gender.text = person.gender
hairColor.text = person.haircolor
mass.text = person.mass
height.text = person.height
skinColor.text = person.skincolor
person.homeWorld{(homeWorld) in
self.homeworld.text = homeWorld
}
}
}
然后创建GetPeopleResponse.swift类
import Foundation
enum networkingError : Error{
case badNetworkigStuff
}
import Foundation
struct Person {
private let homeWorldLink : String
let birthyear : String
let gender : String
let haircolor : String
let eyecolor : String
let height : String
let mass : String
let name : String
let skincolor : String
init?(json : JSON) {
guard let birthyear = json["birth_year"] as? String,
let eyecolor = json["eye_color"] as? String,
let gender = json["gender"] as? String,
let haircolor = json["hair_color"] as? String,
let height = json["height"] as? String,
let homeWorldLink = json["homeworld"] as? String,
let mass = json["mass"] as? String,
let name = json["name"] as? String,
let skincolor = json["skin_color"] as? String
else { return nil }
self.homeWorldLink = homeWorldLink
self.birthyear = birthyear
self.gender = gender
self.haircolor = haircolor
self.eyecolor = eyecolor
self.height = height
self.mass = mass
self.name = name
self.skincolor = skincolor
}
func homeWorld(_ completion: @escaping (String) -> Void) {
networkingService.shared.getHomeWorld(homeWorldLink: homeWorldLink){ (homeWorld) in
completion(homeWorld)
}
}
}
import Foundation
struct GetPeopleResponse {
let people : [Person]
init(json :JSON) throws {
guard let results = json["results"] as? [JSON] else { throw networkingError.badNetworkigStuff}
let people = results.map{Person(json: $0)}.flatMap{ $0 }
self.people = people
}
}
import Foundation
class model : NSObject{
var name : String
var descriptionStr: String
init(name : String, descriptionStr: String)
{
self.name = name
self.descriptionStr = descriptionStr
}
然后是我们的视图控制器类
import UIKit
class ViewController: UIViewController {
@IBOutlet var tableVieww: UITableView!
var people = [Person]()
@IBAction func getAction(_ sender: Any)
{
print("GET")
networkingService.shared.getPeople{ response in
self.people = response.people
self.tableVieww.reloadData()
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
guard segue.identifier == "peopleToDetails",
let detailVC = segue.destination as? DetailVC,
let person = sender as AnyObject as? Person
else {return}
detailVC.person = person
}
}
extension ViewController:UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return people.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = people[indexPath.row].name
return cell
}
}
extension ViewController:UITableViewDelegate{
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "peopleToDetails", sender: people[indexPath.row])
}
}
在我们的故事板中
请使用带有标识符的segue-peopleToDetails将我们的视图与另一个视图连接起来
- 在第一个视图中使用UITableView
- 使用UIButton获取数据
- 在我们的DetailVc中使用9个标签
import UIKit
class ViewController: UIViewController {
@IBOutlet var usernameTextField: UITextField!
@IBOutlet var passwordTextField: UITextField!
var usertypeStr :String = "-----------"
var loginDictionary : NSDictionary?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func loginButtonClicked(_ sender: Any) {
WebServices.userLogin(userName: usernameTextField.text!, password: passwordTextField.text!,userType: usertypeStr) {(result, message, status )in
if status {
let loginDetails = result as? WebServices
self.loginDictionary = loginDetails?.loginData
if self.loginDictionary?["status"] as? String == "error"
{
self.alertMessage(alerttitle: "Login Error", (self.loginDictionary?["message"] as? String)!)
} else if self.loginDictionary?["status"] as? String == "ok" {
self.alertMessage(alerttitle: "", "Success")
}else {
self.alertMessage(alerttitle: "", (self.loginDictionary?["message"] as? String)!)
}
} else {
self.alertMessage(alerttitle: "", "Sorry")
}
}
}
func alertMessage(alerttitle:String,_ message : String){
let alertViewController = UIAlertController(title:alerttitle, message:message, preferredStyle: .alert)
alertViewController.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(alertViewController, animated: true, completion: nil)
}
}
为WebserviceClass插入以下代码
import Foundation
import Alamofire
class WebServices: NSObject {
enum WebServiceNames: String {
case baseUrl = "https://---------------"
case UserLogin = "------------"
}
// MARK: - Login Variables
var loginData : NSDictionary?
class func userLogin(userName: String,password : String,userType : String, completion : @escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> ()) {
let url = WebServiceNames.baseUrl.rawValue + WebServiceNames.UserLogin.rawValue
let params = ["USER": userName,"PASS":password,"API_Key" : userType]
WebServices.postWebService(urlString: url, params: params as [String : AnyObject]) { (response, message, status) in
print(response ?? "Error")
let result = WebServices()
if let data = response as? NSDictionary {
print(data)
result.loginData = data
completion(result, "Success", true)
}else {
completion("" as AnyObject?, "Failed", false)
}
}
}
//MARK :- Post
class func postWebService(urlString: String, params: [String : AnyObject], completion : @escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> Void) {
alamofireFunction(urlString: urlString, method: .post, paramters: params) { (response, message, success) in
if response != nil {
completion(response as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}
class func alamofireFunction(urlString : String, method : Alamofire.HTTPMethod, paramters : [String : AnyObject], completion : @escaping (_ response : AnyObject?, _ message: String?, _ success : Bool)-> Void){
if method == Alamofire.HTTPMethod.post {
Alamofire.request(urlString, method: .post, parameters: paramters, encoding: URLEncoding.default, headers: nil).responseJSON { (response:DataResponse<Any>) in
print(urlString)
if response.result.isSuccess{
completion(response.result.value as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}else {
Alamofire.request(urlString).responseJSON { (response) in
if response.result.isSuccess{
completion(response.result.value as AnyObject?, "", true)
}else{
completion(nil, "", false)
}
}
}
}
//Mark:-Cancel
class func cancelAllRequests()
{
Alamofire.SessionManager.default.session.getTasksWithCompletionHandler { dataTasks, uploadTasks, downloadTasks in
dataTasks.forEach { $0.cancel() }
uploadTasks.forEach { $0.cancel() }
downloadTasks.forEach { $0.cancel() }
}
}
}
<代码>导入基础
进口阿拉莫菲尔
类WebServices:NSObject{
枚举WebServiceNames:字符串{
case baseUrl=”https://---------------"
case UserLogin=“------------”
}
//标记:-登录变量
var Loginda:NSDictionary?
类func userLogin(用户名:String,密码:String,用户类型:String,完成:@escaping(\uresponse:AnyObject?,\umessage:String?,\usuccess:Bool)->()){
设url=WebServiceNames.baseUrl.rawValue+WebServiceNames.UserLogin.rawValue
让params=[“USER”:用户名,“PASS”:密码,“API_Key”:userType]
网状物
var url : String = "https://restcountries.eu/rest/v2/all"
URLSession.shared.dataTask(with: NSURL(string: url) as! URL) { data, response, error in
// Handle result
let response = String (data: data!, encoding: String.Encoding.utf8)
print("response is \(response)")
do {
let getResponse = try JSONSerialization.jsonObject(with: data!, options: .allowFragments)
print(getResponse)
let countryArray = getResponse as! NSArray
print(countryArray)
let country1 = countryArray[0] as! [String:Any]
let name = country1["name"] as! String
print(name)
} catch {
print("error serializing JSON: \(error)")
}
}.resume()
}