这是解决方案:
LOAMutableURLRequest *request =
[[[LOAMutableURLRequest alloc] initWithURL:requestTokenURL
consumer:self.consumer
token:nil
callback:linkedInCallbackURL
signatureProvider:nil] autorelease];
[request setHTTPMethod:@"POST"];
LOARequestParameter *nameParam = [[LOARequestParameter alloc] initWithName:@"scope" value:@"r_fullprofile+w_messages+r_network+r_emailaddress"];
NSArray *params = [NSArray arrayWithObjects:nameParam, nil];
[request setParameters:params];
LOARequestParameter * scopeParameter=[LOARequestParameter requestParameter:@"scope" value:@"r_fullprofile w_messages r_network r_emailaddress"];
[request setParameters:[NSArray arrayWithObject:scopeParameter]];
LOADataFetcher *fetcher = [[[LOADataFetcher alloc] init] autorelease];
[fetcher fetchDataWithRequest:request
delegate:self
didFinishSelector:@selector(requestTokenResult:didFinish:)
didFailSelector:@selector(requestTokenResult:didFail:)];