rules 放一個數(shù)組可以嗎。當(dāng)然有一個一定可以的方法，就是 :rules="{validator: validateInput, trigger: 'blur'}" 然后在 data 里面聲明一個 validateInput 方法，具體可以參照 iview 的自定義驗(yàn)證。

建議從計(jì)算屬性的角度解決問題

這種非常規(guī)的校驗(yàn)規(guī)則，建議直接寫自定義驗(yàn)證

<template>
    <Form ref="formCustom" :model="formCustom" :rules="ruleCustom" :label-width="80">
        <FormItem label="Password" prop="passwd">
            <Input type="password" v-model="formCustom.passwd"></Input>
        </FormItem>
        <FormItem label="Confirm" prop="passwdCheck">
            <Input type="password" v-model="formCustom.passwdCheck"></Input>
        </FormItem>
        <FormItem label="Age" prop="age">
            <Input type="text" v-model="formCustom.age" number></Input>
        </FormItem>
        <FormItem>
            <Button type="primary" @click="handleSubmit('formCustom')">Submit</Button>
            <Button @click="handleReset('formCustom')" style="margin-left: 8px">Reset</Button>
        </FormItem>
    </Form>
</template>
<script>
    export default {
        data () {
            const validatePass = (rule, value, callback) => {
                if (value === '') {
                    callback(new Error('Please enter your password'));
                } else {
                    if (this.formCustom.passwdCheck !== '') {
                        // 對第二個密碼框單獨(dú)驗(yàn)證
                        this.$refs.formCustom.validateField('passwdCheck');
                    }
                    callback();
                }
            };
            const validatePassCheck = (rule, value, callback) => {
                if (value === '') {
                    callback(new Error('Please enter your password again'));
                } else if (value !== this.formCustom.passwd) {
                    callback(new Error('The two input passwords do not match!'));
                } else {
                    callback();
                }
            };
            const validateAge = (rule, value, callback) => {
                if (!value) {
                    return callback(new Error('Age cannot be empty'));
                }
                // 模擬異步驗(yàn)證效果
                setTimeout(() => {
                    if (!Number.isInteger(value)) {
                        callback(new Error('Please enter a numeric value'));
                    } else {
                        if (value < 18) {
                            callback(new Error('Must be over 18 years of age'));
                        } else {
                            callback();
                        }
                    }
                }, 1000);
            };
            
            return {
                formCustom: {
                    passwd: '',
                    passwdCheck: '',
                    age: ''
                },
                ruleCustom: {
                    passwd: [
                        { validator: validatePass, trigger: 'blur' }
                    ],
                    passwdCheck: [
                        { validator: validatePassCheck, trigger: 'blur' }
                    ],
                    age: [
                        { validator: validateAge, trigger: 'blur' }
                    ]
                }
            }
        },
        methods: {
            handleSubmit (name) {
                this.$refs[name].validate((valid) => {
                    if (valid) {
                        this.$Message.success('Success!');
                    } else {
                        this.$Message.error('Fail!');
                    }
                })
            },
            handleReset (name) {
                this.$refs[name].resetFields();
            }
        }
    }
</script>

首先，感謝大家的回答。

動態(tài)增減表單項(xiàng)的自定義驗(yàn)證試過了，沒成功，可能是我哪里寫錯了。

后來仔細(xì)查看文檔，發(fā)現(xiàn)pattern ，驗(yàn)證規(guī)則rules可以直接設(shè)置正則pattern:/^((\d\d(.\d)?)|100)$/，例如：

<FormItem :label="'分?jǐn)?shù)：'" 
          :prop="'items.' + index + '.score'+item.index"
          :rules="{pattern:/^((\d\d(.\d)?)|100)$/, message: '請輸入數(shù)值為0~100，小數(shù)點(diǎn)后保留1位', trigger: 'blur'}"> 
     <Input type="text" v-model="item['score'+ item.index]" placeholder="請輸入分?jǐn)?shù)"></Input>
</FormItem>