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144 lines
3.1 KiB
144 lines
3.1 KiB
<cn>
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#### 动态增减表单项
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动态增加、减少表单项。
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</cn>
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<us>
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#### Dynamic Form Item
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Add or remove form items dynamically.
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</us>
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<template>
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<a-form @submit="handleSubmit" :form="form">
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<a-form-item
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v-for="(k, index) in form.getFieldValue('keys')"
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v-bind="index === 0 ? formItemLayout : formItemLayoutWithOutLabel"
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:label="index === 0 ? 'Passengers' : ''"
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:required="false"
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:key="k"
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>
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<a-input
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v-decorator="[
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`names[${k}]`,
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{
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validateTrigger: ['change', 'blur'],
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preserve: true,
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rules: [{
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required: true,
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whitespace: true,
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message: 'Please input passenger\'s name or delete this field.',
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}],
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}
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]"
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placeholder='passenger name'
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style="width: 60%; margin-right: 8px"
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/>
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<a-icon
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v-if="form.getFieldValue('keys').length > 1"
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class='dynamic-delete-button'
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type='minus-circle-o'
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:disabled="form.getFieldValue('keys').length === 1"
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@click="() => remove(k)"
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/>
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</a-form-item>
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<a-form-item v-bind="formItemLayoutWithOutLabel">
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<a-button type='dashed' @click="add" style="width: 60%">
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<a-icon type='plus' /> Add field
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</a-button>
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</a-form-item>
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<a-form-item v-bind="formItemLayoutWithOutLabel">
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<a-button type='primary' htmlType='submit'>Submit</a-button>
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</a-form-item>
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</a-form>
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</template>
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<script>
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let id = 0;
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export default {
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beforeCreate () {
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this.form = this.$form.createForm(this);
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this.form.getFieldDecorator('keys', { initialValue: [], preserve: true });
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},
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data () {
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return {
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formItemLayout: {
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labelCol: {
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xs: { span: 24 },
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sm: { span: 4 },
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},
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wrapperCol: {
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xs: { span: 24 },
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sm: { span: 20 },
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},
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},
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formItemLayoutWithOutLabel: {
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wrapperCol: {
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xs: { span: 24, offset: 0 },
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sm: { span: 20, offset: 4 },
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},
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},
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};
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},
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methods: {
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remove (k) {
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const { form } = this;
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// can use data-binding to get
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const keys = form.getFieldValue('keys');
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// We need at least one passenger
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if (keys.length === 1) {
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return;
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}
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// can use data-binding to set
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form.setFieldsValue({
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keys: keys.filter(key => key !== k),
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});
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},
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add () {
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const { form } = this;
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// can use data-binding to get
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const keys = form.getFieldValue('keys');
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const nextKeys = keys.concat(++id);
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// can use data-binding to set
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// important! notify form to detect changes
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form.setFieldsValue({
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keys: nextKeys,
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});
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},
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handleSubmit (e) {
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e.preventDefault();
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this.form.validateFields((err, values) => {
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if (!err) {
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console.log('Received values of form: ', values);
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}
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});
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},
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},
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};
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</script>
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<style>
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.dynamic-delete-button {
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cursor: pointer;
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position: relative;
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top: 4px;
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font-size: 24px;
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color: #999;
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transition: all .3s;
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}
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.dynamic-delete-button:hover {
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color: #777;
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}
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.dynamic-delete-button[disabled] {
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cursor: not-allowed;
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opacity: 0.5;
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}
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</style>
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