Braintree iOS can't tokenize card

I am trying to tokenize credit card with Braintree iOS. This is my code like in the docs.

self.braintree = [Braintree braintreeWithClientToken:self.clientToken];
   BTClientCardRequest *request = [BTClientCardRequest new];
   request.number = @"4111111111111111";
    request.expirationMonth = @"12";
   request.expirationYear = @"2018";

    [self.braintree tokenizeCard:request
                 completion:^(NSString *nonce, NSError *error){

                 }];

Unfortunately I don't find BTClientCardRequest class in the project, although it is there in Braintree API header directory.

And my Podfile looks like this:

# Uncomment this line to define a global platform for your project
# platform :ios, "6.0"

source 'https://github.com/CocoaPods/Specs.git'

target "myproj" do
pod 'Braintree'
pod "Braintree/API"
end

target "myprojTests" do
pod 'Braintree'
pod "Braintree/API"
end

My Podfile.lock looks like this:

PODS:
  - Braintree (3.3.1):
    - Braintree/API
    - Braintree/Drop-In
    - Braintree/Payments
    - Braintree/PayPal
    - Braintree/UI
    - Braintree/Venmo
  - Braintree/API (3.3.1)
  - Braintree/Drop-In (3.3.1):
    - Braintree/API
    - Braintree/Payments
    - Braintree/PayPal
    - Braintree/UI
    - Braintree/Venmo
  - Braintree/Payments (3.3.1):
    - Braintree/API
    - Braintree/PayPal
    - Braintree/Venmo
  - Braintree/PayPal (3.3.1):
    - Braintree/API
    - Braintree/UI
  - Braintree/UI (3.3.1)
  - Braintree/Venmo (3.3.1):
    - Braintree/API

DEPENDENCIES:
  - Braintree
  - Braintree/API

SPEC CHECKSUMS:
  Braintree: 34538ea612eb8aa2a1187fb273ac80fd496f0628

COCOAPODS: 0.34.1

I am really confused why I don't have this class as well as several other in my project workspace.

Solution

Based on your Podfile.lock, it looks like you have pulled in an older version of Braintree iOS (3.3.1). In this version, -[Braintree tokenizeCard…] has a slightly different signature from the one that you have used, which is based on [Braintree's online documentation][2].

I would recommend upgrading to the latest version by running this command in Terminal:

$ cd /path/to/your/project
$ pod update Braintree

There is a changelog here.

Alternatively, if you do not want to upgrade, you can change your code to look like this:

[braintree tokenizeCardWithNumber:@"4111111111111111"
                   expirationMonth:@"12"
                   expirationYear:@"2020"
                       completion:^(NSString *nonce, NSError *error) {
                           /* Check for errors and use the `nonce` here. */
                       }];