NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-type"];
[request setHTTPBody:jsonData];
// configure NSURLSessionConfiguration with request timeout
NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
// set request timeout
defaultConfigObject.timeoutIntervalForRequest = 120.0;
// create NSURLSession object
// Working fine with below instance of default session but its taking a lot of time to fetch response.
//NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration:defaultConfigObject];
NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: nil delegateQueue: [NSOperationQueue mainQueue]];
// set NSURLSessionDataTask
@try {
NSURLSessionDataTask * dataTask = [defaultSession dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
//
}];
[dataTask resume];
}
答案 0 :(得分：0)
if ([self checkNetworkStatus]) {
@try {
// Create the data and url
NSString *encryptedString = [self createRequest:userContext objectType:deviceObjectType projectType:projectId];
NSDictionary *dictRequest = @{REQ_KEY_REQUEST: encryptedString};
requestString = [JSONHelper dictionaryToJson:dictRequest];
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@Data",globals.API_Base_URL]];
// Create Request
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60.0];
request.HTTPMethod = @"POST"; // For Post
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
int strLength = (int)requestString.length;
[request setValue:[NSString stringWithFormat:@"%d", strLength] forHTTPHeaderField:@"Content-Length"];
NSData *dataRequest = [requestString dataUsingEncoding:NSUTF8StringEncoding];
request.HTTPBody = dataRequest;`enter code here`
id delegateValue = self;
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]
delegate:delegateValue
delegateQueue:[NSOperationQueue mainQueue]];
//NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request
completionHandler:
^(NSData *responseData, NSURLResponse *response, NSError *error) {
// ...
[self destroyNetworkCache];
// [[NSURLCache sharedURLCache] storeCachedResponse:nil forRequest:urlReq];
[[NSURLCache sharedURLCache] removeAllCachedResponses];
dispatch_async(dispatch_get_main_queue(), ^(void)
{
if (! error)
{
[self parseResponse:responseData forObjectType:deviceObjectType andTag:tag withDelegate:del];
}
else
{
NSString *errMsg = error.description;
if (errMsg.length <= 0) {
errMsg = NSLocalizedString(@"msg_network_error", @"msg_network_error");
}
else if (errMsg.length > 0 && [errMsg rangeOfString:@"timed out"].length != 0)
{
errMsg = NSLocalizedString(@"msg_request_timed_out", @"msg_request_timed_out");
}
else if ([self checkForURLDomainError:errMsg])
{
errMsg = NSLocalizedString(@"msg_network_error", @"msg_network_error");
}
if (tag < 0)
{
if ([del conformsToProtocol:@protocol(WTConnectionServiceDelegate)])
{
if ([del respondsToSelector:@selector(wtConnectionService:forObjectType:didFailedWithError:)])
{
[del wtConnectionService:nil forObjectType:deviceObjectType didFailedWithError:errMsg];
return;
}
}
}
else
{
if ([del conformsToProtocol:@protocol(WTConnectionServiceDelegate)])
{
if ([del respondsToSelector:@selector(wtConnectionService:forObjectType:andTag:didFailedWithError:)])
{
[del wtConnectionService:nil forObjectType:deviceObjectType andTag:tag didFailedWithError:errMsg];
return;
}
}
}
}
});
}];
[task resume];
}
@catch (NSException *exception) {
[self handleException:exception];
}
@finally {
}
}
Below Is delegate methods
-(void)URLSession:(NSURLSession *)session didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler
{
completionHandler(NSURLSessionAuthChallengeUseCredential, [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust]);
}
-(void)URLSession:(NSURLSession *)session didBecomeInvalidWithError:(NSError *)error{
}
答案 1 :(得分：0)
任务永远不会完成，因为它永远不会开始。您必须使用resume（）方法手动启动数据任务。
并且不要在try块中使用dataTask对象。