iOS 15

您可以使用一个名为：submitLabel的简单修饰符来更改每个textField的返回键，该修饰符采用返回键类型：

图片来自WWDC21
此外，正如您所看到的，您可以有一个回调来处理回车键按下操作，就像旧的textFieldShouldReturn函数一样，可以通过.onSubmit修饰符访问。
️Xcode 13 beta 1上似乎有一个bug，阻止此修改器在某些情况下工作。

更新

现在有一个更好的解决方案。在iOS 15中，您现在可以添加.submitLabel(.done)修改器。请参阅Mojtaba的回答以了解更多细节。

旧答案

我发现的最好的方法是将包Introspect添加到项目中。
然后在项目文件的任何地方添加import Introspect。
然后添加一个他们的视图修改器到你的Textfield来实现你想要的。

.introspectTextField { textfield in
  textfield.returnKeyType = .done
}

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Introspect是做什么的？

它公开了在SwiftUI中使用的UIKit。所以你在上面看到的Textfield对象可以访问UITextfield的所有功能！这是一个包，所以要注意它可能会在未来崩溃，但现在这是一个很好的选择。
这很好，因为它让你不必为每个视图制作自己的UIKit Package 器。

要获取键盘上的go按钮，请尝试将keyboardtype更改为. webSearch。
//在Xcode 12 beta 2和iOS 14上测试
.keyboardType（.webSearch）

如果有人正在寻找在UIViewRepresentable中 Package EifextField，那么我有一些代码可以分享：

struct CustomTextField: UIViewRepresentable {

    let tag: Int
    let placeholder: String
    let keyboardType: UIKeyboardType
    let returnVal: UIReturnKeyType

    @Binding var text: String
    @Binding var activeFieldTag: Int?
    var totalFields: Int = 0
    @Binding var isSecureTextEntry: Bool
    var textColor: UIColor = .pureWhite
    var font: UIFont = .nexaBold13
    var placeholderTextColor: UIColor = .pureWhite
    var placeholderFont: UIFont = .nexaLight13
    var onEditingChanged: (Bool) -> Void = { _ in }

    var lastActiveFieldTag: Int? {

        // Return, if no active field
        // (It also means textFieldShouldReturn not called yet OR called for last field)
        guard let activeFieldTag = activeFieldTag else {
            return nil
        }
        // Return previous field
        if activeFieldTag > 0 {
            return activeFieldTag - 1
        }
        // Return, if no previous field
        return nil
    }

    func makeUIView(context: Context) -> UITextField {
        let textField = UITextField(frame: .zero)
        textField.keyboardType = self.keyboardType
        textField.returnKeyType = self.returnVal
        textField.tag = self.tag
        textField.textColor = textColor
        textField.font = font
        textField.attributedPlaceholder = NSAttributedString(
            string: self.placeholder,
            attributes: [
                NSAttributedString.Key.foregroundColor: placeholderTextColor,
                NSAttributedString.Key.font: placeholderFont,
            ]
        )
        textField.delegate = context.coordinator
        textField.autocorrectionType = .no
        textField.isSecureTextEntry = isSecureTextEntry
        return textField
    }

    func updateUIView(_ textField: UITextField, context: Context) {
        if textField.text != self.text {
            textField.text = self.text
        }
        handleFirstResponder(textField)
        if textField.isSecureTextEntry != isSecureTextEntry {
            textField.isSecureTextEntry = isSecureTextEntry
        }
    }

    func handleFirstResponder(_ textField: UITextField) {

        // return if field is neither active nor last-active
        if tag != lastActiveFieldTag && tag != activeFieldTag {
            return
        }

        // return if field is already active
        if lastActiveFieldTag == activeFieldTag {
            return
        }

        // It creates problem in UI when we press the next button too fast and continuously on keyboard
        //        // Remove focus from last active field
        //        if lastActiveFieldTag == tag {
        //            uiView.removeFocus()
        //            return
        //        }

        // Give focus to active field
        if activeFieldTag == tag {
            textField.focus()
            return
        }
    }

    // Its called when pressing Next button on the keyboard
    // See textFieldShouldReturn
    func updateNextTag() {
        // There is no next field so set activeFieldTag to nil
        if tag + 1 == totalFields {
            activeFieldTag = nil
        } else {
            // Set next field tag as active
            activeFieldTag = tag + 1
        }
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }

    class Coordinator: NSObject, UITextFieldDelegate {

        var parent: CustomTextField

        init(_ textField: CustomTextField) {
            self.parent = textField
        }

        func updatefocus(textfield: UITextField) {
            textfield.focus()
        }

        func textFieldShouldReturn(_ textField: UITextField) -> Bool {

            // Give focus to next field
            parent.updateNextTag()
            parent.text = textField.text ?? ""

            // If there is no next active field then dismiss the keyboard
            if parent.activeFieldTag == nil {
                DispatchQueue.main.async {
                    textField.removeFocus()
                }
            } 

            return true
        }

        func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
            DispatchQueue.main.async {
                // To enable user to click on any textField while another is active
                self.parent.activeFieldTag = self.parent.tag
                self.parent.onEditingChanged(true)
            }
            return true
        }

        func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
            self.parent.text = textField.text ?? ""
            DispatchQueue.main.async {
                self.parent.onEditingChanged(false)
            }
            return true
        }

        func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
            if let text = textField.text, let rangeExp = Range(range, in: text) {
                self.parent.text = text.replacingCharacters(in: rangeExp, with: string)
            }
            return true
        }
    }
}

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iOS 15.0+

macOS 12.0+、Mac Catalyst 15.0+、tvOS 15.0+、watchOS 8.0+
第一个月
设置此视图的提交标签。
https://developer.apple.com

Form {
    TextField("Username", $viewModel.username)
        .submitLabel(.done)
}

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