LinkedIn Authorization Screen Not Appearing - ios

Question

I have integrated official LinkedIn iOS SDK(https://developer.linkedin.com/downloads#iossdk). While clicking on "Share via LinkedIn" in my iOS app, it opens LinkedIn official iOS app on my iOS device & ask for login, but after logging user stays on LinkedIn App only not coming back to my iOS App & no authorization screen displayed. (I am using iPad with iOS 8 & 9) Is there any suggestion?
My Plist Settings to configure Linkedin:
Sample Code:
-(void)postOnLinkedIn:(NSMutableDictionary *)dictData {
NSMutableDictionary *dictCode = [NSMutableDictionary dictionaryWithObjectsAndKeys:#"anyone",#"code", nil];
[dictData setObject:#"Check out developer.linkedin.com! http://linkd.in/1FC2PyG" forKey:#"comment"];
[dictData setObject:dictCode forKey:#"visibility"];
NSString *url = #"https://api.linkedin.com/v1/people/~/shares";
NSString *payload = [NSString stringWithFormat:#"%#",dictData];
NSLog(#"%#",payload);
// NSString *payload = [NSString initWithString:#"{
// \"comment\":\"Check out developer.linkedin.com! http://linkd.in/1FC2PyG\",
// \"visibility\":{ \"code\":\"anyone\" }
// }"];
if ([LISDKSessionManager hasValidSession]) {
[[LISDKAPIHelper sharedInstance] postRequest:url stringBody:payload
success:^(LISDKAPIResponse *response) {
// do something with response
}
error:^(LISDKAPIError *apiError) {
// do something with error
}];
}
else {
[self connectToLinkedIn];
}
}
-(void)connectToLinkedIn {
[LISDKSessionManager createSessionWithAuth:[NSArray arrayWithObjects:LISDK_BASIC_PROFILE_PERMISSION,LISDK_EMAILADDRESS_PERMISSION,LISDK_W_SHARE_PERMISSION, nil]
state:#"state"
showGoToAppStoreDialog:YES
successBlock:^(NSString *returnState) {
NSLog(#"%s","success called!");
LISDKSession *session = [[LISDKSessionManager sharedInstance] session];
NSLog(#"value=%# isvalid=%#",[session value],[session isValid] ? #"YES" : #"NO");
}
errorBlock:^(NSError *error) {
//[self clearSession:<#(id)#>]
NSLog(#"%s %#","error called! ", [error description]);
//self.lastError = error;
// _responseLabel.text = [error description];
//[self updateControlsWithResponseLabel:YES];
}
];
}