TypeError: Cannot read property '0' of undefined
at rev (appservice.js:210)
at _o (appservice.js:648)
at m1 (appservice.js:6510)
at appservice.js:6529
at _ (WAService.js:16)
at e.value (WAService.js:16)
at a._updateCb (WAService.js:15)
at a.doUpdates (WAService.js:14)
at t.applyProperties (WAService.js:16)
at Function.value (WAService.js:16)
js中初始化
wxml中调用
得到错误