错误BTClient无法初始化，因为提供的授权在ios中无效

我在我的应用程序中集成了Braintree支付网关，但它有一些错误，如“错误BTClient无法初始化，因为提供的授权无效”我不知道如何解决此问题，请帮助我解决错误

我把代码贴在这里

-(void)Show_payment{

self.braintreeClient = [[BTAPIClient alloc] initWithAuthorization:_clientToken];



BTDropInViewController *dropInViewController = [[BTDropInViewController alloc]
                                                initWithAPIClient:self.braintreeClient];




dropInViewController.delegate = self;

// Or, upon initialization
dropInViewController.view.tintColor = [UIColor blueColor];


BTPaymentRequest *paymentRequest = [[BTPaymentRequest alloc] init];
paymentRequest.callToActionText = @"Connect";


dropInViewController.paymentRequest = paymentRequest;




// This is where you might want to customize your view controller (see below)

// The way you present your BTDropInViewController instance is up to you.
// In this example, we wrap it in a new, modally-presented navigation controller:
UIBarButtonItem *item = [[UIBarButtonItem alloc]
                         initWithBarButtonSystemItem:UIBarButtonSystemItemCancel
                         target:self
                         action:@selector(userDidCancelPayment)];

dropInViewController.navigationItem.leftBarButtonItem = item;
UINavigationController *navigationController = [[UINavigationController alloc]
                                                initWithRootViewController:dropInViewController];
[self presentViewController:navigationController animated:YES completion:nil];}

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你解决了这个问题吗？是的，我解决了。@sathya你解决了这个问题吗？是的，我解决了。@sathya