uniapp 微信小程序报错

TypeError: Cannot read property 'split' of undefined
at Object.placeholder (vendor.js? [sm]:8326)
at Object.string (vendor.js? [sm]:8281)
at Object.Handler.gen (vendor.js? [sm]:8093)
at Object.object (vendor.js? [sm]:8225)
at Object.Handler.gen (vendor.js? [sm]:8093)
at Object.array (vendor.js? [sm]:8173)
at Object.Handler.gen (vendor.js? [sm]:8093)
at Object.object (vendor.js? [sm]:8225)
at Object.Handler.gen (vendor.js? [sm]:8093)
at Object.Mock2.mock (vendor.js? [sm]:8045)

TypeError: Cannot read property 'split' of undefined
at Object.placeholder (vendor.js? [sm]:8326)
at Object.string (vendor.js? [sm]:8281)
at Object.Handler.gen (vendor.js? [sm]:8093)
at Object.object (vendor.js? [sm]:8225)
at Object.Handler.gen (vendor.js? [sm]:8093)
at Object.array (vendor.js? [sm]:8173)
at Object.Handler.gen (vendor.js? [sm]:8093)
at Object.object (vendor.js? [sm]:8225)
at Object.Handler.gen (vendor.js? [sm]:8093)
at Object.Mock2.mock (vendor.js? [sm]:8045)