如果钱包里没有卡,苹果支付按钮会有什么行为?

这是苹果的 guidelines on implementing Apple Pay.

以下是相关章节: 使用 PKPaymentAuthorizationViewController 方法

如果 canMakePayments 回报 NO ,该设备不支持Apple Pay。不要显示Apple Pay按钮。相反,回到另一种支付方式。

如果 可以付款 回报 YES 但是 canMakePaymentsUsingNetworks :返回 不 ,该设备支持Apple Pay,但用户尚未为任何请求的网络添加卡。您可以选择显示一个支付设置按钮,提示用户设置其卡。用户点击此按钮后,立即启动设置新卡的过程(例如,通过调用openPaymentSetup方法)。

要创建一个Apple Pay品牌按钮,用于在iOS8.3或更高版本上启动付款请求,请使用 PKPaymentButton 上课。

从PKPaymentButton文档:

提供用于触发付款的按钮 苹果支付或提示用户设置一张卡。

你可以用一个类型初始化它 setUp .

当用户点击此按钮时,调用 openPaymentSetup .

 override func viewDidLoad() {
    super.viewDidLoad()

    var applePayButton: PKPaymentButton?
    if !PKPaymentAuthorizationViewController.canMakePayments() {
      // Apple Pay not supported
      return
    }
    if !PKPaymentAuthorizationViewController.canMakePayments(usingNetworks: [.masterCard]) {
      // Apple Pay supported and payment not setup
      applePayButton = PKPaymentButton.init(paymentButtonType: .setUp, paymentButtonStyle: .black)
      applePayButton?.addTarget(self, action: #selector(self.setupPressed(_:)), for: .touchUpInside)
    } else {
      // Apple Pay supported and payment setup
      applePayButton = PKPaymentButton.init(paymentButtonType: .buy, paymentButtonStyle: .black)
      applePayButton?.addTarget(self, action: #selector(self.payPressed(_:)), for: .touchUpInside)
    }

    applePayButton?.translatesAutoresizingMaskIntoConstraints = false
    self.view.addSubview(applePayButton!)
    applePayButton?.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true
    applePayButton?.widthAnchor.constraint(equalToConstant: 200).isActive = true
    applePayButton?.heightAnchor.constraint(equalToConstant: 60).isActive = true
    applePayButton?.bottomAnchor.constraint(equalTo: self.view.bottomAnchor, constant: -20).isActive = true

  }

  @objc func payPressed(_ sender: PKPaymentButton){
    // Start payment
  }

  @objc func setupPressed(_ sender: PKPaymentButton){
    let passLibrary = PKPassLibrary()
    passLibrary.openPaymentSetup()
  }

}