8、 Picker usage drop-down box selection effect

<view class="uni-form-item">
	<view class="title"> detection result </view>
	<view class="input_box">
		<picker @change="examinationType" :range="examinationTypeArray" v-model="form.status">
			<label class="" style="color: gray;">{
    {
     examinationTypeArrayType }}</label>
		</picker>
	</view>
</view>

export default {
    
	data() {
    
			return {
    
				form: {
    
					status: '',
					//  there status The input parameter is a list of options array 012 （ Non option text ）
				},
				//  detection result   Optional text 
				examinationTypeArray:[' negative ',' positive ',' Invalid result '],
				examinationTypeIndex:'',
				examinationTypeArrayType:' Please enter ',
			}
		},
	methods: {
    
		examinationType(e) {
    
			 this.examinationTypeIndex = e.target.value;
			 this.form.status=e.target.value;
			 this.examinationTypeArrayType=this.examinationTypeArray[this.examinationTypeIndex];
			 console.log(e);
			},
	}
}