64 lines
1.6 KiB
Dart
64 lines
1.6 KiB
Dart
import 'package:flutter/cupertino.dart';
|
||
|
||
class SCKeybordUtil {
|
||
static final List<Function(bool)> _lst = [];
|
||
static bool _kbVis = false;
|
||
static double _kbHt = 0.0;
|
||
|
||
/// 添加全局键盘监听
|
||
static void onChange(Function(bool visible) listener) {
|
||
_lst.add(listener);
|
||
// 立即通知当前状态
|
||
listener(_kbVis);
|
||
}
|
||
|
||
/// 移除监听器
|
||
static void removeListener(Function(bool visible) listener) {
|
||
_lst.remove(listener);
|
||
}
|
||
|
||
/// 初始化键盘监听（必须在MaterialApp外层调用）
|
||
static void init() {
|
||
WidgetsBinding.instance.addObserver(_KbObs());
|
||
}
|
||
|
||
/// 获取当前键盘是否可见
|
||
static bool get isVisible => _kbVis;
|
||
|
||
/// 获取当前键盘高度
|
||
static double get height => _kbHt;
|
||
|
||
/// 隐藏键盘
|
||
static void hide(BuildContext context) {
|
||
FocusScope.of(context).unfocus();
|
||
}
|
||
|
||
/// 更新键盘状态（内部使用）
|
||
static void _updSt(bool visible, double height) {
|
||
if (visible != _kbVis || height != _kbHt) {
|
||
_kbVis = visible;
|
||
_kbHt = height;
|
||
|
||
// 通知所有监听器
|
||
for (final listener in _lst) {
|
||
listener(visible);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// 键盘状态观察者
|
||
class _KbObs extends WidgetsBindingObserver {
|
||
@override
|
||
void didChangeMetrics() {
|
||
final view = WidgetsBinding.instance.platformDispatcher.views.first;
|
||
|
||
if (view.viewInsets.bottom > 0) {
|
||
// 键盘弹出
|
||
SCKeybordUtil._updSt(true, view.viewInsets.bottom);
|
||
} else {
|
||
// 键盘收起
|
||
SCKeybordUtil._updSt(false, 0.0);
|
||
}
|
||
}
|
||
} |