TextField("Name", text: $name)
我找到了这个方法
func focusable(_ isFocusable: Bool = true, onFocusChange: @escaping (Bool) -> Void = { _ in }) -> some View
但它仅适用于 MacOS,我该如何为 iOS 做类似的事情?
您可以使用init(_:text:onEditingChanged:onCommit:)文本字段中存在的初始化程序。当您开始编辑和结束编辑时,您将触发一个动作。您可以在下面找到最小的示例。
import SwiftUI
struct ContentView: View {
@State private var greeting: String = "Hello world!"
var body: some View {
TextField("Welcome", text: $greeting, onEditingChanged: { (editingChanged) in
if editingChanged {
print("TextField focused")
} else {
print("TextField focus removed")
}
})
}
}
希望这可以帮助。
在 iOS 15 中,我们可以通过以下方式检测更改@FocusState:
@FocusState private var isFocused: Bool
...
var body: some View {
Form {
TextField("Name", text: $name)
.focused($isFocused)
.onChange(of: isFocused) { isFocused in
// ...
}
}
}