HarmonyOS 鸿蒙Next Dialog的构建和open只能在@Component中么，如何封装一个统一逻辑的Dialog

自定义的dialog可以通过export方式对外暴露：

@CustomDialog
export default struct CustomDialogExample {
@Link textValue: string
@Link inputValue: string
controller: CustomDialogController
// 若尝试在CustomDialog中传入多个其他的Controller，以实现在CustomDialog中打开另一个或另一些CustomDialog，那么此处需要将指向自己的controller放在最后
cancel: () => void
confirm: () => void

build() {
Column() {
Text('Change text').fontSize(20).margin({ top: 10, bottom: 10 })
TextInput({ placeholder: '', text: this.textValue }).height(60).width('90%')
.onChange((value: string) => {
this.textValue = value
})
Text('Whether to change a text?').fontSize(16).margin({ bottom: 10 })
Flex({ justifyContent: FlexAlign.SpaceAround }) {
Button('cancel')
.onClick(() => {
this.controller.close()
this.cancel()
}).backgroundColor(0xffffff).fontColor(Color.Black)
Button('confirm')
.onClick(() => {
this.inputValue = this.textValue
this.controller.close()
this.confirm()
}).backgroundColor(0xffffff).fontColor(Color.Red)
}.margin({ bottom: 10 })
}
// dialog默认的borderRadius为24vp，如果需要使用border属性，请和borderRadius属性一起使用
}
}

2.在需要用到dialog的@Component中import引入并初始化：

import CustomDialogExample from './CustomDialogExample';

@Entry
[@Component](/user/Component)
struct CustomDialogUser {
@State textValue: string = ''
@State inputValue: string = 'click me'
dialogController: CustomDialogController = new CustomDialogController({
builder: CustomDialogExample({
cancel: this.onCancel,
confirm: this.onAccept,
textValue: $textValue,
inputValue: $inputValue
}),
cancel: this.existApp,
autoCancel: true,
alignment: DialogAlignment.Default,
offset: { dx: 0, dy: -20 },
gridCount: 4,
customStyle: false
})

// 在自定义组件即将析构销毁时将dialogControlle删除和置空
aboutToDisappear() {
delete this.dialogController, // 删除dialogController
this.dialogController = undefined // 将dialogController置空
}

onCancel() {
console.info('Callback when the first button is clicked')
}

onAccept() {
console.info('Callback when the second button is clicked')
}

existApp() {
console.info('Click the callback in the blank area')
}

build() {
Column() {
Button(this.inputValue)
.onClick(() => {
if (this.dialogController != undefined) {
this.dialogController.open()
}
}).backgroundColor(0x317aff)
}.width('100%').margin({ top: 5 })
}
}