使用 Swift 更改占位符(placeholder)文本颜色 about swiftui-example

[jaywcjlove]

设置占位符

import SwiftUI

public struct PlaceholderStyle: ViewModifier {
    var showPlaceHolder: Bool
    var placeholder: String

    public func body(content: Content) -> some View {
        ZStack(alignment: .leading) {
            if showPlaceHolder {
                Text(placeholder)
                .padding(.horizontal, 15)
            }
            content
            .foregroundColor(Color.white)
            .padding(5.0)
        }
    }
}

struct ContentView: View {
    @State var text = ""
    var body: some View {
        TextField("", text: $text)
        .modifier(
            PlaceholderStyle(showPlaceHolder: text == "", placeholder: "My Placeholder")
        )
    }
}