1. 通过v-model获取表单的内容
2. 通过form获取表单的内容

v-model方法:

<template>
	<view>
		<input v-model="phoneData" placeholder="GULAO">
		<button @click="GULAO">执行</button>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				phoneData:""
			}
		},
		methods: {
			GULAO(){
				console.log(this.phoneData)
				if(this.phoneData.length < 5){
					uni.showToast({
					    icon: 'none',
						position: 'bottom',
					    title: 'GR'
					});
				}
			}
		}
	}
</script>

<style>

</style>

form获取表单内容:

<template>
	<view>
		<form @submit="formSubmit" @reset="formReset">
			<input name="id" type="text" :value="id"/>
			<button form-type="submit">更新</button>
		</form>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				id : ""
			}
		},
		methods: {
			formSubmit: function(e) {
				console.log(e.detail.value.id)
				var ber = e.detail.value.id
				if(ber.length < 5){
					uni.showToast({
					    icon: 'none',
						position: 'bottom',
					    title: 'GR'
						});
					}
				}
			}
		}
	
</script>

<style>

</style>