Xcode ViewController 显示在范围内找不到“支付”
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【中文标题】Xcode ViewController 显示在范围内找不到“支付”【英文标题】:Xcode ViewController shows Cannot find 'pay' in scope 【发布时间】:2022-01-07 04:37:45 【问题描述】:我正在尝试将我的 ios 应用程序链接到条带,但在我的视图控制器中它显示错误 - “在范围内找不到‘支付’”
附上错误截图——
我的 ViewController 是 -
import UIKit
import Stripe
import Alamofire
class ViewController: UIViewController
// Mark UIViews
var productStackView = UIStackView()
var paymentStackView = UIStackView()
var paymentTextField = STPPaymentCardTextField()
var productImageView = UIImageView()
var productLabel = UILabel()
var payButton = UIButton()
var loadingSpinner = UIActivityIndicatorView()
var outputTextView = UITextView()
override func viewDidLoad()
super.viewDidLoad()
self.setupUI()
func setupUI()
setupProductImage()
setupProductLabel()
setupLoadingSpinner()
setupPaymentTextFiled()
setupPayButton()
setupOutputTextView()
self.productStackView.frame = CGRect(x: 0, y: 70, width: 330, height: 150)
self.productStackView.center.x = self.view.center.x
self.productStackView.alignment = .center
self.productStackView.axis = .vertical
self.productStackView.distribution = .equalSpacing
self.productStackView.addArrangedSubview(self.productImageView)
self.productStackView.setCustomSpacing(10, after: self.productImageView)
self.productStackView.addArrangedSubview(self.productLabel)
self.view.addSubview(self.productStackView)
self.paymentStackView.frame = CGRect(x:0, y: 250, width: 300, height: 100)
self.paymentStackView.center.x = self.view.center.x
self.paymentStackView.alignment = .fill
self.paymentStackView.axis = .vertical
self.paymentStackView.distribution = .equalSpacing
self.paymentStackView.addArrangedSubview(self.paymentTextField)
self.paymentStackView.addArrangedSubview(self.payButton)
self.view.addSubview(self.paymentStackView)
func setupProductImage()
self.productImageView = UIImageView(frame: CGRect(x: 50, y: 50, width: 275, height: 200))
self.productImageView.image = UIImage(named: "stripe press")
self.productImageView.contentMode = .scaleAspectFit
func setupProductLabel()
self.productLabel.frame = CGRect(x: 0, y: 420, width: self.view.frame.width, height: 50)
func setupOutputTextView()
self.outputTextView.frame = CGRect(x: 0, y: 420, width: self.view.frame.width - 50, height: 100)
self.outputTextView.center.x = self.view.center.x
self.outputTextView.textAlignment = .left
self.outputTextView.font = UIFont.systemFont(ofSize: 18)
self.outputTextView.text = ""
self.outputTextView.layer.borderColor = UIColor.purple.cgColor
self.outputTextView.isEditable = false
self.view.addSubview(self.outputTextView)
func setupPaymentTextFiled()
self.paymentTextField.frame = CGRect(x: 0, y: 0, width: 330, height: 660)
func setupPayButton()
self.payButton.frame = CGRect(x: 60, y: 480, width: 150, height: 40)
self.payButton.setTitle("Submit Payment", for: .normal)
self.payButton.setTitleColor(UIColor.white, for: .normal)
self.payButton.layer.cornerRadius = 5.0
self.payButton.backgroundColor = UIColor.init(red:50/255,green: 50/255,blue: 93/255, alpha:1.0)
self.payButton.layer.borderWidth = 1.0
self.payButton.addTarget(self, action: #selector(pay), for: .touchUpInside)
***/* ERROR -Cannot find 'pay' in scope */***
func setupLoadingSpinner()
self.loadingSpinner.color = UIColor.darkGray
self.loadingSpinner.frame = CGRect(x: 0, y: 300, width: 25, height: 25)
self.loadingSpinner.center.x = self.view.center.x
self.view.addSubview(self.loadingSpinner)
func startLoading()
DispatchQueue.main.async
self.loadingSpinner.startAnimating()
self.loadingSpinner.isHidden = false
func stopLoading()
DispatchQueue.main.async
self.loadingSpinner.stopAnimating()
self.loadingSpinner.isHidden = true
func diplayStatus (_ message:String)
DispatchQueue.main.async
self.outputTextView.text += message + " \n"
self.outputTextView.scrollRangeToVisible(NSMakeRange(self.outputTextView.text.count - 1, 1))
上面代码中的错误我加粗了。
如前所述,我还附上了截图。 我尝试了一切,但无法解决它。如何整理?
【问题讨论】:
什么是“支付”?我也无法在您的代码中找到它。 “支付”应该是能够创建选择器的有效函数。 【参考方案1】:选择器应该是您希望在用户点击支付按钮时运行的 Objc 函数。
@objc func pay()
//Your pay code goes in here
【讨论】:
如何将它集成到我的代码中? 你关注过 Stripe 文档吗?我不知道它是如何工作的,但是您肯定需要导入库并遵循他们的文档,然后您的pay
方法应该使用 stripe 的 API 来进行付款。
请看下面我的回答
为你点赞【参考方案2】:
是的,你们是对的,我添加了“@objc func pay() ”,如下所示,一切正常:-
.......func diplayStatus (_ message:String)
DispatchQueue.main.async
self.outputTextView.text += message + " \n"
self.outputTextView.scrollRangeToVisible(NSMakeRange(self.outputTextView.text.count - 1, 1))
@objc func pay() //here
【讨论】:
所以你决定用已经给出的相同代码添加一个新答案?以上是关于Xcode ViewController 显示在范围内找不到“支付”的主要内容,如果未能解决你的问题,请参考以下文章
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