![](/img/trans.png)
[英]Remove padding and border around textField in UIAlertController
[英]Remove padding around UISearchBar textfield
不幸的是,没有办法可靠地删除此填充。 当前(从 iOS 13 开始)水平填充为 8 磅,垂直填充为 10 磅。
您可以简单地将前导/尾随约束设置为“Discogs|Search”视图 + 8 pts 以使其显示相同的大小。
我需要做一些类似于在 SwiftUI 中包装UISearchBar
的事情,而是在UISearchBar
UIViewRepresentable
上使用padding
修饰符,如下所示:
struct SearchBar: View {
private var title: String = "Search"
@Binding private var text: String
private var onEditingChanged: (Bool) -> Void
init(
_ title: String,
text: Binding<String>,
onEditingChanged: @escaping (Bool) -> Void = { _ in }
) {
self.title = title
self._text = text
self.onEditingChanged = onEditingChanged
}
var body: some View {
__SearchBar(title, text: $text, onEditingChanged: onEditingChanged)
.padding(.horizontal, -8)
.padding(.vertical, -10)
}
}
private struct __SearchBar: UIViewRepresentable {
private var placeHolder: String = "Search"
@Binding private var text: String
private var onEditingChanged: (Bool) -> Void
init(
_ title: String,
text: Binding<String>,
onEditingChanged: @escaping (Bool) -> Void
) {
self.placeHolder = title
self._text = text
self.onEditingChanged = onEditingChanged
}
final class Coordinator: NSObject, UISearchBarDelegate {
private let parent: __SearchBar
@Binding var text: String
init(parent: __SearchBar, text: Binding<String>) {
self.parent = parent
_text = text
}
func searchBar(
_ searchBar: UISearchBar,
textDidChange searchText: String
) {
text = searchText
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
parent.onEditingChanged(true)
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
parent.onEditingChanged(false)
}
}
func makeCoordinator() -> Coordinator {
Coordinator(parent: self, text: $text)
}
func makeUIView(context: Context) -> UISearchBar {
let searchBar = UISearchBar(frame: .zero)
searchBar.placeholder = placeHolder
searchBar.searchBarStyle = .minimal
searchBar.delegate = context.coordinator
return searchBar
}
func updateUIView(_ uiView: UISearchBar, context: Context) {
uiView.text = text
}
}
通过将backgroundimage更改为nil可以有所帮助:searchBar.backgroundImage = nil
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