IONIC 3 readAsDataURL大部分时间不起作用*

时间:2019-06-13 00:25:16

标签: ionic-framework ionic3

我正在将多个图像(jpeg)上传到我的api服务器。该代码过去一直可以正常工作并且运行了几个月,但90%的时间开始失败。

promises = [];
constructor(public navCtrl: NavController,...,public file: File) {


uploadImage(imgArr) {
//Hardcored to test for single image
console.log("Came here");
this.file.readAsDataURL(this.image[0].substr(0, 
this.image[0].lastIndexOf('/') + 1), 
this.image[0].substr(this.image[0].lastIndexOf('/') + 1)).then(result => {
              console.log(result);
            }).catch((err)=> {
              console.log(err);
            });;
console.log("Came here too but never run readAsDataURL");
//Ran readAsDataURL at times
}
uploadImage2(imgArr) {
//Original Code
console.log("Came here");
for (let i = 0; i<this.image.length;i++) {
              console.log("Looped Here");
              let promise = 
this.file.readAsDataURL(this.image[i].substr(0, this.image[i].lastIndexOf('/') + 1), this.image[i].substr(this.image[i].lastIndexOf('/') + 1)).then(result => 
{
console.log(result);
}).catch((err)=> {
                console.log("ERROR",err);
              });
                this.promises.push(promise);
            }
console.log("Came here too but never run readAsDataURL");
//Log this.promises shows length > 0 but all null
//Ran readAsDataURL at times
}
 uploadImage3(imgArr) {
 //Modify to use array map
 this.promises = this.image.map( img => {
 console.log(img);
 this.file.readAsDataURL(img.substr(0, img.lastIndexOf('/') + 1), img.substr(img.lastIndexOf('/') + 1)).then((result) => {
                console.log(result);
              }).catch ((err)=> {
                console.log('ERROR',err);
                 });
            });
//Same results at uploadImage2
}
}

我只需要它来读取文件。

*文件和文件夹存在

*文件路径(例如file:///storage/emulated/0/Android/data/***/cache/1560382588088.jpg

离子:

离子(离子CLI):4.7.1    离子框架:离子角3.9.2    @ ionic / app-scripts:3.2.4

科尔多瓦:

cordova(Cordova CLI):8.0.0    Cordova平台:Android 7.0.0    Cordova插件:cordova-plugin-ionic-keyboard 2.1.3,cordova-plugin-ionic-webview 2.3.1(和其他10个插件)

@ ionic-native /文件4.20.0

插件:cordova-plugin-file 来源:npm://cordova-plugin-file@^6.0.1 安装的版本:6.0.1 远程版本:6.0.1

0 个答案:

没有答案