自定义校验规则（用于封装表单组件）

export const verifyFormData = (source, rules, verifyFn) => {
    const keys = Object.keys(rules)
    for (let i = 0; i < keys.length; i++) {
        const key = keys[i]
        let [result, message] = verifyItem(source[key], rules[key])
        if (result && verifyFn && typeof verifyFn === 'function') {
            const [fnResult, fnMsg] = verifyFn(source[key], rules[key], key)
            result = result && fnResult
            message = fnMsg || message
        }
        if (!result) {
            uni.showToast({
                title: message,
                icon: "error"
            })
            return false
        }
    }
    return true
}

用法：

data里
formData: {
projectName: "",
projectIntroduction: ""
}
rules: {
     projectName: {
                    required: true,
                    message: '请输入项目名称' 
                },
                projectIntroduction: {
                    required: true,
                    message: '请输入项目介绍' 
                },
            }

methods里
let result = verifyFormData(this.formData（表单数据源）, this.rules（规则）, (source,rule,key,) => { 
     if(key == 'fileIdList') {
          return [source.length > 0, '图片不能为空' ]
     }
       return [true]
     }); 
 if(!result) return;