点击后如何更改 SwiftUI TextField 样式? [英] How to change SwiftUI TextField style after tapping on it?

问题描述

我像这样更改了 TextField 样式:

I changed TextField style like this:

TextField("Test", text: $name).textFieldStyle(CustomTextFieldStyle())

现在我希望它在用户点击它时改变样式.

now I want it to change style when user taps on it.

我的 CustomTextFieldStyle 定义为:

My CustomTextFieldStyle is defined as:

  public struct CustomTextFieldStyle : TextFieldStyle {
    public func _body(configuration: TextField<Self._Label>) -> some View {
        configuration
            .font(.callout)
            .padding(10)
            .background(
                RoundedRectangle(cornerRadius: 4)
                    .strokeBorder(SBGreen, lineWidth: 2))
    }
}

推荐答案

TextField("Test", text: $name).textFieldStyle(tapflag ? CustomTextFieldStyle1() : CustomTextStyle2())

您有自己的 TextStyle 示例吗?请分享出去！

do you have an example of your own TextStyle? Please, share it!

更新

你最好在你的样式中使用一些参数并将其绑定到父"视图

you are better to use some parameter with your style and bind it to "parent" View

import SwiftUI

struct ContentView: View {

    @State private var email = ""
    @State private var editing = false
    var body: some View {
        TextField("Email", text: self.$email, onEditingChanged: { edit in
            self.editing = edit
        })
            .textFieldStyle(MyTextFieldStyle(focused: $editing)).font(.title).border(Color.blue)
    }
}

struct MyTextFieldStyle: TextFieldStyle {
    @Binding var focused: Bool
    func _body(configuration: TextField<Self._Label>) -> some View {
        configuration
        .padding(10)
        .background(
            RoundedRectangle(cornerRadius: 10, style: .continuous)
                .stroke(focused ? Color.red : Color.gray, lineWidth: 3)
        ).padding()
    }
}


struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

结果看起来像

这篇关于点击后如何更改 SwiftUI TextField 样式?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！