应用中经常用到弹窗,比如警告弹窗、日期选择弹窗、文本选择弹窗以及其他自定义弹窗等等。本例将为大家介绍如何使用不同的弹窗。
效果呈现
本例最终效果如下:
运行环境
本例基于以下环境开发,开发者也可以基于其他适配的版本进行开发:
实现思路
本例中涉及的 4 类弹窗及实现方案如下:
开发步骤
①首先,使用 AlertDialog 实现警告弹窗
具体代码如下:
alertDialog(context: Context.UIAbilityContext) {
AlertDialog.show({
// 通过message设置告警信息
message: '当前数据未保存,是否确认离开?',
// 通过alignment设置弹窗在界面垂直方向的对齐方式,此处设置为底部对齐
alignment: DialogAlignment.Bottom,
// 通过offset设置基于对齐位置的便宜量
offset: {
dx: 0,
dy: -20
},
// 弹窗中左起第一个按钮
primaryButton: {
value: '取消',
action: () => {
console.info('Callback cancel button is clicked');
}
},
// 弹窗中左起第二个按钮
secondaryButton: {
value: '确定',
action: () => {
// Exiting the app.
context.terminateSelf();
console.info('Callback definite button is clicked');
}
}
});
}
具体代码如下:
datePickerDialog(dateCallback) {
DatePickerDialog.show({
start: new Date('1900-1-1'),
end: new Date('2100-1-1'),
// 通过变量selectedDate将选中的日期设置给参数selected
selected: this.selectedDate,
lunar: false,
// 使用onAccept监听选择的日期
onAccept: (value: DatePickerResult) => {
let year = value.year;
let month = value.month + 1;
let day = value.day;
let birthdate: string = this.getBirthDateValue(year, month, day);
// 通过setFullYear将选中的日期传递给变量selectedDate
this.selectedDate.setFullYear(value.year, value.month, value.day)
// 返回选中的日期
dateCallback(birthdate);
}
});
}
通过 range 设置文本选择项,使用 onAccept 监听选择的文本项,本例中通过变量 selectedGender 将选中的性别的索引设置给参数 selected,这样弹窗弹出时的性别就默认为上次选中的性别。
textPickerDialog(sexArray: Resource, sexCallback) {
// 判断文本项的列表是否为空
if (this.isEmptyArr(sexArray)) {
console.error('sex is null');
return;
}
TextPickerDialog.show({
// 通过range设置文本选择项
range: sexArray,
// 通过变量selectedGender将选中的性别的索引设置给参数selected
selected: this.selectedGender,
// 使用onAccept监听选择的文本项
onAccept: (result: TextPickerResult) => {
sexCallback(result.value);
// 获取选中项的索引
this.selectedGender = result.index
},
onCancel: () => {
console.info('TextPickerDialog onCancel');
}
});
}
④使用 CustomDialogController 实现自定义弹窗
当现有弹窗不能满足业务诉求时,开发者可以自行设计弹窗的样式。在实现自定义弹窗时,需要将弹窗的 UI 放在被 @CustomDialog 修饰的自定义组件中,然后使用 CustomDialogController 的实例来控制弹窗的弹出和关闭。
// 使用@CustomDialog修饰自定义弹窗
@CustomDialog
struct CustomDialogFrame{
...
// 定义CustomDialogController
controller: CustomDialogController
build(){
Column() {
Text('兴趣爱好').fontSize(20).margin({ top: 10, bottom: 10 })
TextInput({ placeholder: '', text: this.textValue }).height(60).width('90%')
.onChange((value: string) => {
this.textValue = value
})
Flex({ justifyContent: FlexAlign.SpaceAround }) {
Button('取消')
.onClick(() => {
// 点击‘取消’,弹窗关闭
this.controller.close()
})
.backgroundColor('')
.fontColor('#007DFF')
Button('保存')
.onClick(() => {
this.inputValue = this.textValue
// 点击‘保存’,弹窗关闭
this.controller.close()
})
.backgroundColor(0xffffff)
.fontColor('#007DFF')
}.margin({ bottom: 10 })
}.justifyContent(FlexAlign.Start)
}
}
...
// 实例化自定义弹窗
customDialogController: CustomDialogController = new CustomDialogController({
// 使用上文创建的自定义弹窗进行实例化
builder: CustomDialogFrame({
textValue: $textValue,
inputValue: $inputValue
}),
alignment: DialogAlignment.Bottom,
offset: {
dx: 0,
dy: -20
}
});
...
完整代码
本例完整代码如下:
import Context from '@ohos.app.ability.common';
import hilog from '@ohos.hilog';
@Component
struct TextFrame{
@Link content: string;
private textImage:Resource;
private text:string;
onTextClick:()=>void;
build(){
Row(){
Image(this.textImage)
.width(24)
.height(24)
.margin({left:12})
Text(this.text)
.fontSize(16)
.margin({ left:12 })
.height(24)
Text(this.content)
.fontSize(16)
.textAlign(TextAlign.End)
.textOverflow({ overflow: TextOverflow.Ellipsis })
.maxLines(1)
.margin({
left: 16,
right: 7
})
.layoutWeight(1)
.width('100%')
Image($r('app.media.ic_arrow'))
.width(12)
.height(24)
.margin({ right: 14 })
}
.margin({ top: 24 })
.borderRadius(24)
.backgroundColor(Color.White)
.width('93.3%')
.height(64)
.onClick(this.onTextClick)
}
}
@Component
struct InputFrame{
private inputImage: Resource;
private hintText: string;
build(){
Row() {
Image(this.inputImage)
.width(24)
.height(24)
.margin({ left: 12 })
TextInput({ placeholder: this.hintText })
.fontSize(16)
.padding({ left: 12 })
.placeholderColor('#99000000')
.backgroundColor(Color.White)
.fontWeight(FontWeight.Normal)
.fontStyle(FontStyle.Normal)
.fontColor(Color.Black)
.margin({ right: 32 })
.layoutWeight(1)
.height(48)
}
.margin({ top: 24 })
.borderRadius(24)
.backgroundColor(Color.White)
.width('93.3%')
.height(64)
}
}
@CustomDialog
struct CustomDialogFrame{
@Link textValue: string
@Link inputValue: string
controller: CustomDialogController
build(){
Column() {
Text('兴趣爱好').fontSize(20).margin({ top: 10, bottom: 10 })
TextInput({ placeholder: '', text: this.textValue }).height(60).width('90%')
.onChange((value: string) => {
this.textValue = value
})
Flex({ justifyContent: FlexAlign.SpaceAround }) {
Button('取消')
.onClick(() => {
this.controller.close()
}).backgroundColor('').fontColor('#007DFF')
Button('保存')
.onClick(() => {
this.inputValue = this.textValue
this.controller.close()
}).backgroundColor(0xffffff).fontColor('#007DFF')
}.margin({ bottom: 10 })
}.justifyContent(FlexAlign.Start)
}
}
@Entry
@Component
struct Index {
@State birthdate: string = '';
@State sex: string = '';
@State textValue: string = '';
@State inputValue: string = '';
selectedDate: Date = new Date("2010-1-1")
selectedGender:number = 0
private sexArray: Resource = $r('app.strarray.sex_array');
customDialogController: CustomDialogController = new CustomDialogController({
builder: CustomDialogFrame({
textValue: $textValue,
inputValue: $inputValue
}),
alignment: DialogAlignment.Bottom,
offset: {
dx: 0,
dy: -20
}
});
alertDialog(context: Context.UIAbilityContext) {
AlertDialog.show({
message: '当前数据未保存,是否确认离开?',
alignment: DialogAlignment.Bottom,
offset: {
dx: 0,
dy: -20
},
primaryButton: {
value: '取消',
action: () => {
console.info('Callback cancel button is clicked');
}
},
secondaryButton: {
value: '确定',
action: () => {
// Exiting the app.
context.terminateSelf();
console.info('Callback definite button is clicked');
}
}
});
}
datePickerDialog(dateCallback) {
DatePickerDialog.show({
start: new Date('1900-1-1'),
end: new Date('2100-1-1'),
selected: this.selectedDate,
lunar: false,
onAccept: (value: DatePickerResult) => {
let year = value.year;
let month = value.month + 1;
let day = value.day;
let birthdate: string = this.getBirthDateValue(year, month, day);
this.selectedDate.setFullYear(value.year, value.month, value.day)
dateCallback(birthdate);
}
});
}
textPickerDialog(sexArray: Resource, sexCallback) {
if (this.isEmptyArr(sexArray)) {
console.error('sex is null');
return;
}
TextPickerDialog.show({
range: sexArray,
selected: this.selectedGender,
onAccept: (result: TextPickerResult) => {
sexCallback(result.value);
this.selectedGender = result.index
},
onCancel: () => {
console.info('TextPickerDialog onCancel');
}
});
}
getBirthDateValue(year: number, month: number, day: number): string {
let birthdate: string = `${year}${'年'}${month}` +
`${'月'}${day}${'日'}`;
return birthdate;
}
isEmpty(obj): boolean {
return obj === undefined || obj === null || obj === '';
}
isEmptyArr(array): boolean {
return this.isEmpty(array) || array.length === 0;
}
build() {
Row() {
Column() {
Row(){
Image($r('app.media.ic_back'))
.width(26)
.height(26)
.alignSelf(ItemAlign.Start)
.margin({
left: '7.2%',
top: 19
})
.onClick(() => {
let context = getContext(this) as Context.UIAbilityContext;
this.alertDialog(context);
})
Text('个人信息')
.fontColor(Color.Black)
.fontSize(20)
.margin({ top: 20,left:20 })
.alignSelf(ItemAlign.Center)
}.width('100%')
Image($r('app.media.ic_avatar'))
.width(56)
.height(56)
.alignSelf(ItemAlign.Center)
.margin({ top: '5.5%' })
Text('头像')
.fontColor(Color.Black)
.fontSize(16)
.margin({ top: '2.1%' })
.alignSelf(ItemAlign.Center)
InputFrame({
inputImage: $r('app.media.ic_nickname'),
hintText: '昵称'
})
TextFrame({
textImage: $r('app.media.ic_birthdate'),
text: '出生日期',
content: $birthdate,
onTextClick: () => {
this.datePickerDialog((birthValue: string) => {
this.birthdate = birthValue;
});
}
})
TextFrame({
textImage: $r('app.media.ic_sex'),
text: '性别',
content: $sex,
onTextClick: () => {
this.textPickerDialog(this.sexArray, (sexValue: string) => {
this.sex = sexValue;
});
}
})
InputFrame({
inputImage: $r('app.media.ic_signature'),
hintText: '个性签名'
})
TextFrame({
textImage: $r('app.media.ic_hobbies'),
text: '兴趣爱好',
content: $textValue,
onTextClick: () => {
this.customDialogController.open();
}
})
}
.backgroundColor('#F5F5F5')
.height('100%')
.width('100%')
}
.height('100%')
}
}
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