swift - NSURLSession validation -

-

i'm trying o work out correct (or @ least good) way handle data request using swift 2.

what want achieve to:

  1. check if data connection available, if no alert user
  2. if connection available make request
  3. check request response, if invalid alert user
  4. if valid, check response code , display 1 of 2 messages

what have far

    let requesturl: string = **********************     let url = nsurl(string: requesturl)!     let request = nsmutableurlrequest(url: url)     let session = nsurlsession.sharedsession()      let postparams: nsdictionary = ["id":newid!]      request.httpmethod = "post"      {         let jsondata = try nsjsonserialization.datawithjsonobject(postparams, options: [])         let jsonstring = nsstring(data: jsondata, encoding: nsutf8stringencoding)! string         let utf8str = jsonstring.datausingencoding(nsutf8stringencoding)         let base64encoded = utf8str?.base64encodedstringwithoptions(nsdatabase64encodingoptions(rawvalue: 0))         let bodydata = "data="+base64encoded!          request.httpbody = bodydata.datausingencoding(nsutf8stringencoding)     } catch {         print("error serialising json")     }      session.datataskwithrequest(request) { data, response, error in          // make sure response ok         guard let realresponse = response as? nshttpurlresponse realresponse.statuscode == 200 else         {             // show success message             print("invalid response server")         }          // read json data         if let poststring = nsstring(data:data!, encoding: nsutf8stringencoding) as? string {             if let responsedata = poststring.datausingencoding(nsutf8stringencoding) {                 let json = json(data: responsedata)                 let responsemessage:string = json["response"]["data"].stringvalue                 if(responsemessage == "success")                 {                    print("successful post")                 }else{                    print("error saving post")                 }              }         }     }

currently if run in airplane mode nothing happens, catch , tell these need data connection

try sth this: 

func connectedtonetwork() -> bool {             var zeroaddress = sockaddr_in()             zeroaddress.sin_len = uint8(sizeofvalue(zeroaddress))             zeroaddress.sin_family = sa_family_t(af_inet)             let defaultroutereachability = withunsafepointer(&zeroaddress) {                 scnetworkreachabilitycreatewithaddress(nil, unsafepointer($0))             }             var flags = scnetworkreachabilityflags()             if !scnetworkreachabilitygetflags(defaultroutereachability!, &flags) {                 return false             }             let isreachable = (flags.rawvalue & uint32(kscnetworkflagsreachable)) != 0             let needsconnection = (flags.rawvalue & uint32(kscnetworkflagsconnectionrequired)) != 0             return (isreachable && !needsconnection)             } 
if(connectedtonetwork() == true){ //call function make request } else { //show alert need internet connection }

Comments

Post a Comment

Popular posts from this blog

ruby - Trying to change last to "x"s to 23 -

-
i have been playing around irb , have string looks this: irb(main):072:0> puts ["[\"4354 5432 5432 xxxxx\", \"6547 6547 8543 xxxxx\", \"2344 6543 6674 xxxxx\", \"2346 6236 7543 xxxxx\", \"1273 5585 5587 xxxxx\"]"] => nil irb(main):073:0> what want gsub last 2 "x" s of each 17 digit combination, 23 . what i've tried far (i've been using rubular): a.gsub(/\d[x]/,"23") <= grabs "x" s i'm close a.gsub(/\w[x{2}]/,"23") <= grabs "x" s grabs two digits each combination. is there easier way i'm not understanding? a.gsub(/\d{4} \d{4} \d{4} xxx\kxx/, '23') \d{4} = 4 digits what \k drop matched far. can use don't replace entire number, still able validate have in desired format.
Read more

jquery - Clone last and append item to closest class -

-
this bare-bones code on page: <div class="list-container"> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> </div> <p><button class="add-list-item">add</button></p> <div class="list-container"> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> <div class="single-list-item"> <button>remove</button> </div> </div> <p><button class="add-list-item">add</button></p> <di...
Read more

css - Can I use the :after pseudo-element on an input field? -

-
i trying use :after css pseudo-element on input field, not work. if use span , works ok. <style type="text/css"> .mystyle:after {content:url(smiley.gif);} .mystyle {color:red;} </style> this works (puts smiley after "buu!" , before "some more") <span class="mystyle">buuu!</span>a more this not work - colors somevalue in red, there no smiley. <input class="mystyle" type="text" value="somevalue"> what doing wrong? should use pseudo-selector? note: cannot add span around input , because being generated third-party control. :after , :before not supported in internet explorer 7 , under, on elements. it's not meant used on replaced elements such form elements (inputs) , image elements . in other words it's impossible pure css. however if using jquery can use $(".mystyle").after("add smiley here"); api docs on .after to ...
Read more