我正在尝试实现功能以选择图像并对其进行裁剪。之后，我想将其上传到Firebase。
由于某种原因，它根本不起作用，并且“ readAsArrayBuffer”没有执行
。
我对此很陌生，所以我将不胜感激:)
谢谢
这是我尝试的：
例如，“ newPath”看起来像这样：
"file:///storage/emulated/0/Android/data/io.ionic.starter/cache/
1565766305015-cropped.jpg?1565766307602"
而且“ nameFile”看起来像这样：
"1565766305015-cropped.jpg".
--
constructor(private imagePicker: ImagePicker, private crop: Crop,
private file: File) {
let storageDb = firebase.storage();
this.storageRef = storageDb.ref();
}
pickImage() {
this.imagePicker.getPictures(this.imagePickerOptions).then((results)
=> {
// tslint:disable-next-line: prefer-for-of
for (let i = 0; i < results.length; i++) {
this.cropImage(results[i]);
}
}, (err) => {
alert(err);
});
}
cropImage(imgPath) {
this.crop.crop(imgPath, { quality: 50 })
.then(
newPath => {
try {
let n = newPath.lastIndexOf("/");
let x = newPath.lastIndexOf("g");
let nameFile = newPath.substring(n + 1, x + 1);
this.file.readAsArrayBuffer(newPath, nameFile).then((res) => {
let blob = new Blob([res], { type: "image/jpeg" });
var uploadTask = this.storageRef.child('images/' + this.event.id).put(blob);
uploadTask.on('state_changed', (snapshot) => {
let url = uploadTask.snapshot.downloadURL;
this.croppedImagepath = url;
}, (error) => {
alert("error: " + error);
}, () => {
alert("uploaded");
let url = uploadTask.snapshot.downloadURL;
this.croppedImagepath = url;
})
})
}
catch (z) {
alert('error beim erstellen des blobs' + z);
}
},
error => {
alert('Error cropping image' + error);
}
);
}
最佳答案
求求您，您从何处获得摘录？实际上还有另一个问题，they are using the File class differently：
readFile(file: any) {
const reader = new FileReader();
reader.onloadend = () => {
const formData = new FormData();
const imgBlob = new Blob([reader.result], {
type: file.type
});
formData.append('file', imgBlob, file.name);
this.uploadImageData(formData);
};
reader.readAsArrayBuffer(file);
}