操作:
1. 如果是this.setData, 則更換this的指向,如:let _this = this
2. 在函數中通過參數回調時,會發現callback not a function, 則:
-- 将回調函數放到this下,在通過先加載回調函數,就可以了 ,如:
// 選擇圖檔
chooseImg() {
let that = this;
wx.chooseImage({
success: function (res) {
// 聲明回調函數和上傳選擇的圖檔
that.uploadImgCallback= function (uploadImgArr) {
let arrImg = that.data.tpArrayImg.concat(uploadImgArr)
wx.setStorageSync('imgList', arrImg)
wx.navigateTo({
url: '/pages/editorPreview/editorPreview'
})
}
that.uploadImg(res.tempFilePaths)
},
})
},
// 上傳圖檔
uploadImg(imgArr) {
if (imgArr.length == 0) {
return;
}
let that = this
let imgSrc = imgArr.shift()
wx.uploadFile({
url: app.globalData.host + '/album/saveImg',
filePath: imgSrc,
name: 'file',
formData: {
'album': wx.getStorageSync('setText') ? wx.getStorageSync('setText').title : 'default',
'openid': wx.getStorageSync('openid')
},
success: res => {
that.data.uploadImgSrc.push(res.data)
if (imgArr.length > 0) {
that.uploadImg(imgArr)
} else {
that.uploadImgCallback(that.data.uploadImgSrc)
}
}
})
},
轉載于:https://www.cnblogs.com/maoriaty/p/9116285.html