报错场景：将APi中得到的response数据，用Vue$set()使数据动态响应
报错代码：
methods: {
textTranslate: function (text, to) {
$.ajax({
url: 'http://openapi.youdao.com/api',
type: 'post',
dataType: 'jsonp',
data: {
q: text,
appKey: this.appKey,
salt: this.salt,
from: this.from,
to: to,
sign: md5(this.appKey + text + this.salt + this.key)
},
success: function (data) {
this.$set(this.$data, 'translatedText', data.translation[0])
}
})
}
}
报错原因：这里的this指向的不是VueModel,
解决方法1:在执行函数中定义指向Model的变量 let vm = this ,用该变量替代this
methods: {
textTranslate: function (text, to) {
let vm = this
$.ajax({
url: 'http://openapi.youdao.com/api',
type: 'post',
dataType: 'jsonp',
data: {
q: text,
appKey: this.appKey,
salt: this.salt,
from: this.from,
to: to,
sign: md5(this.appKey + text + this.salt + this.key)
},
success: function (data) {
vm.$set(vm.$data, 'translatedText', data.translation[0])
}
})
}
}
解决方法2:将。siccess改为箭头函数的写法，这样子箭头函数里的this其实是指向VueModel的，这样子用this看不会报错了
success: (data) => {
this.$set(this.$data, 'translatedText', data.translation[0])
}
