Why nsurlsession.datataskwithrequst was canceled - ios

Question

I am using nsurlsession on RxSwift.
I am facing two problems about nsurlsession on RxSwift.
I created Custom Observable.
This Observable has used nsurlsession.
nsurlsession.datataskwithrequst was canceled everytime on RxSwift.
My code is here
func getWorkInfo(request:NSURLRequest,type1:C.Type,type2:W.Type? = nil) -> Observable<(C?,[W]?, NSHTTPURLResponse)>{
return Observable.create { observer in
var d: NSDate?
if Logging.URLRequests(request) {
d = NSDate()
}
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request) { (data, response, error) in
guard let response = response, data = data else {
ColorLogger.defaultInstance?.error(error)
observer.on(.Error(error ?? RxCocoaURLError.Unknown))
return
}
guard let httpResponse = response as? NSHTTPURLResponse else {
observer.on(.Error(RxCocoaURLError.NonHTTPResponse(response: response)))
return
}
guard let jsonString: String = NSString(data:data, encoding:NSUTF8StringEncoding) as? String else{
observer.on(.Error(ApiError.FormatError))
return
}
//カウント系
let countObj = Mapper<C>().map(jsonString)
//一覧系
//二つ目を指定してない場合はnilを返す
if type2 != nil{
let aryObj = Mapper<W>().mapArray(jsonString)
observer.on(.Next(countObj,aryObj, httpResponse))
}else{
observer.on(.Next(countObj,nil, httpResponse))
}
observer.on(.Completed)
}
let t = task
t.resume()
return AnonymousDisposable{task.cancel()}
}
}
Above method was called by here.
func getWorkCount(dicParam: NSDictionary) -> Observable<WorkCount?> {
// URL作成
let strParam = dicParam.urlEncodedString()
let strUrl = Const.ShiftApiBase.SFT_API_DOMAIN+Const.ApiUrl.WORK_COUNT+"?"+strParam
// 求人リストデータを取得
let url = NSURL(string: strUrl)!
let request = NSURLRequest(URL: url)
let client = WorkClient<WorkCount,Work>()
ColorLogger.defaultInstance?.debug(strUrl)
return client.getWorkInfo(request, type1: WorkCount.self)
.observeOn(Dependencies.sharedDependencies.backgroundWorkScheduler)
.catchError{(error) -> Observable<(WorkCount?,[Work]?, NSHTTPURLResponse)> in
print("error")
ColorLogger.defaultInstance?.error("UnknownError")
return Observable.empty()
}
.map { countObj,workObj,httpResponse in
if httpResponse.statusCode != 200 {
throw ApiError.Bad
}
return countObj
}
.observeOn(Dependencies.sharedDependencies.mainScheduler)
}
And My subscribe is here.
/**
検索件数を取得
- parameter param: <#param description#>
*/
func getSearchCount(param: [String:String]){
let dicParam = NSDictionary(dictionary: param)
api.getWorkCount(dicParam)
.catchError{
error -> Observable<WorkCount?> in
switch error{
case ApiError.Bad:
ColorLogger.defaultInstance?.error("status error")
break
case ApiError.FormatError:
ColorLogger.defaultInstance?.error("FormatError")
break
case ApiError.NoResponse:
ColorLogger.defaultInstance?.error("NoResponse")
break
default:
ColorLogger.defaultInstance?.error("UnKnownError")
break
}
return Observable.just(nil)
}
.subscribeNext { [weak self] countObj in
self?.count.value = countObj?.returned_count
}
.addDisposableTo(disposeBag)
}
I have two problems.
1:nsurlsession was canceled every time.I don know reason.
2:Even if I got error on NSURLSession,I could not catch error on "CatchError".
By the way,when i try to use the following code,But nsurlsession might be canceled.
It might be a base nsurlsession on RxSwift.
func getWorkCount4(dicParam: NSDictionary) -> Observable<WorkCount?> {
// URL作成
let strParam = dicParam.urlEncodedString()
let strUrl = Const.ShiftApiBase.SFT_API_DOMAIN+Const.ApiUrl.WORK_COUNT+"?"+strParam
// 求人リストデータを取得
let url = NSURL(string: strUrl)!
let request = NSURLRequest(URL: url)
let session = ApiBase.sharedObj.createNSURLSession()
return NSURLSession.sharedSession().rx_response(request)
.observeOn(Dependencies.sharedDependencies.backgroundWorkScheduler)
.map { data,httpResponse in
if httpResponse.statusCode != Const.HTTP_RESPONSE.HTTP_STATUS_CODE_OK {
throw ApiError.Bad
}
guard let jsonString: String = NSString(data:data, encoding:NSUTF8StringEncoding) as? String else{
throw ApiError.FormatError
}
let countObj = Mapper<WorkCount>().map(jsonString)
return countObj
}
.observeOn(Dependencies.sharedDependencies.mainScheduler)
}
What is this problem?

Answer 1

I could resolve by myself.
Above method does not have any problem.
Below code has problem.
// MARK: - 検索カウント
extension SearchCount{
/// 検索用のViewModel
var searchViewModel:SearchViewModel {
return SearchViewModel()
}
/**
検索の件数を取得
*/
func getSearchCount(){
setApiParameter()
searchViewModel.getSearchCount(apiParam)
}
}
I defined searchViewModel on Class,the i could resolve.