在我的应用程序上，我有一个表单，用户可以填写该表单并将其与SOAP请求一起发送给我们。
发送的表格：
但是我有一个问题，我没有互联网连接，无法使用SOAP请求发送数据。
因此，首先我将请求保存在Core Data中，这样就可以了...当用户在应用程序上时，我会执行预定的请求，以查看他们是否是Core Data中发送请求的请求。
但是，如果应用程序未运行怎么办？在Android中，我使用后台服务，但是对于Apple，这是不可能的：
Android Services equivalent in iOS Swift
有人有想法检索数据吗？
香皂功能：
func soapCall(fonction:String, soapMessageParamsTab:[SoapMessageParams], completion: @escaping (_ strData: NSString)-> ()/*, completion: @escaping (_ result: Int, _ resultContactWebId: Int)->()*/){
let soapRequest = AEXMLDocument()
let attributes = ["xmlns:SOAP-ENV" : "http://schemas.xmlsoap.org/soap/envelope/", "xmlns:ns1" : namespace, "xmlns:xsd" : "http://www.w3.org/2001/XMLSchema", "xmlns:xsi" : "http://www.w3.org/2001/XMLSchema-instance", "xmlns:SOAP-ENC" : "http://schemas.xmlsoap.org/soap/encoding/", "SOAP-ENV:encodingStyle" : "http://schemas.xmlsoap.org/soap/encoding/"]
let envelope = soapRequest.addChild(name: "SOAP-ENV:Envelope", attributes: attributes)
let body = envelope.addChild(name: "SOAP-ENV:Body")
let sendLead = body.addChild(name: "ns1:"+fonction)
for obj in soapMessageParamsTab {
sendLead.addChild(name: obj.soapName, value: obj.soapValue, attributes: ["xsi:type" : "xsd:"+obj.soapType])
}
//sendLead.addChild(name: "xml", value: messageSoap, attributes: ["xsi:type" : "xsd:string"])
let soapMessage = soapRequest.xmlString
let messageSoapMinify = minify(soapMessage)
// URL Soap
let urlString = soapServiceURL
let url = URL(string: urlString)
var theRequest = URLRequest(url: url!)
// Taille SoapMessage
let msgLength = String(messageSoapMinify.characters.count)
// Soap Login
let username = soapUsername
let password = soapPassword
let loginString = NSString(format: "%@:%@", username, password)
let loginData: Data = loginString.data(using: String.Encoding.utf8.rawValue)!
let base64LoginString = loginData.base64EncodedString(options: NSData.Base64EncodingOptions.lineLength64Characters)
// Requete Soap
theRequest.addValue("text/xml; charset=utf-8", forHTTPHeaderField: "Content-Type")
theRequest.addValue("Keep-Alive", forHTTPHeaderField: "Connection")
theRequest.addValue(msgLength, forHTTPHeaderField: "Content-Length")
theRequest.addValue("urn:ResponseAction", forHTTPHeaderField: "SOAPAction")
theRequest.httpMethod = "POST"
theRequest.httpBody = messageSoapMinify.data(using: String.Encoding.utf8, allowLossyConversion: true)
theRequest.addValue("Basic \(base64LoginString)", forHTTPHeaderField: "Authorization")
// print("Request is \(theRequest.allHTTPHeaderFields!)")
let session = Foundation.URLSession.shared
let task = session.dataTask(with: theRequest, completionHandler: {data, response, error -> Void in
if error != nil
{
print(error?.localizedDescription)
}
//print("Response Login: \(response)")
//print("Error Login: \(error)")
let strData = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)!
//print("Body Login: \(strData)")
completion(strData)
})
task.resume()
}
最佳答案
将NSURLSession与后台配置一起使用应该没问题。
注意：如果该应用被用户明确杀死，则计划的请求将被取消。仅当该应用因任何原因（内存不足，崩溃等）而被系统杀死时，此技巧才有效。如果该应用被用户杀死，您将无能为力。后台获取可能是一种解决方案，但将由iOS决定是否以及何时唤醒应用程序以进行机会获取。
这可以帮助您：
https://blog.newrelic.com/2016/01/13/ios9-background-execution/
编辑：
本教程也可能有用：https://www.raywenderlich.com/110458/nsurlsession-tutorial-getting-started
关于swift - 当他们没有互联网连接时检索信息的解决方案，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/41674040/