我正在尝试显示从相机拍摄的图像并将其显示在视图中。我已经在许多网站上搜索了此答案,但没有任何效果。我已经尝试过DomSanitizer,Base64甚至照片库,但是从它们返回的图像没有显示。
我的home.ts文件是
import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { Camera, CameraOptions } from '@ionic-native/camera';
import { DomSanitizer } from '@angular/platform-browser';
@Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage {
myPhoto:any;
image;
constructor(public navCtrl: NavController, private camera: Camera, public DomSanitizer: DomSanitizer) {
}
takePhoto(){
const options: CameraOptions = {
quality: 100,
targetHeight: 320,
targetWidth: 320,
destinationType: this.camera.DestinationType.FILE_URI,
sourceType: this.camera.PictureSourceType.CAMERA,
encodingType: this.camera.EncodingType.JPEG,
mediaType: this.camera.MediaType.PICTURE
}
this.camera.getPicture(options).then((imageData) => {
// imageData is either a base64 encoded string or a file URI
// If it's base64 (DATA_URL):
this.myPhoto = 'data:image/jpeg;base64,' + imageData;
this.image = imageData;
console.log(this.myPhoto);
alert(this.myPhoto);
}, (err) => {
// Handle error
});
}
}
这是我的home.html代码
<ion-header>
<ion-navbar>
<ion-title>
Ionic Blank
</ion-title>
</ion-navbar>
</ion-header>
<ion-content padding>
<button ion-button (click)="takePhoto()" >Take Photo</button>
<!-- <img src="{{myPhoto}}"/> -->
<!-- <img src="{{image}}"/> -->
<!-- <img [src]="DomSanitizer.bypassSecurityTrustUrl(myPhoto)"/> -->
<!-- <img data-ng-src="{{myPhoto}}"/> -->
<img src="data:image/jpeg;base64,file:///storage/sdcard0/Android/data/io.ionic.starter/cache/1533211220154.jpg"/>
</ion-content>
这里的注释代码是我尝试过但没有成功。
答案 0 :(得分:1)
我使用了文件插件及其方法readAsDataURL。对我来说很好。希望它能帮助那里的人们:)
const options: CameraOptions = {
quality: 100,
allowEdit: true,
sourceType: this.camera.PictureSourceType.CAMERA ,
saveToPhotoAlbum: true,
correctOrientation: true,
encodingType: this.camera.EncodingType.JPEG,
destinationType: this.camera.DestinationType.FILE_URI
}
this.camera.getPicture(options).then((imageData) => {
//imageData will hold the full file path so we need to extract filename and path
var filename = imageData.substring(imageData.lastIndexOf('/')+1);
var path = imageData.substring(0,imageData.lastIndexOf('/')+1);
//then use it in the readAsDataURL method of cordova file plugin
//this.file is declared in constructor file :File
this.file.readAsDataURL(path, filename).then(res=>{
item.pic = res;
});
}, (err) => {
alert(err);
});
答案 1 :(得分:0)
在ts文件中使用此功能
takePhoto(){
const options: CameraOptions = {
quality: 100,
targetHeight: 320,
targetWidth: 320,
destinationType: this.camera.DestinationType.DATA_URL,
sourceType: this.camera.PictureSourceType.CAMERA,
encodingType: this.camera.EncodingType.JPEG,
mediaType: this.camera.MediaType.PICTURE
}
this.camera.getPicture(options).then((imageData) => {
// imageData is either a base64 encoded string or a file URI
// If it's base64 (DATA_URL):
this.myPhoto = 'data:image/jpeg;base64,' + imageData;
this.image = imageData;
console.log(this.myPhoto);
}, (err) => {
// Handle error
});
}
在您的html中使用它
<img [src]="myPhoto"/>
答案 2 :(得分:0)
最后我得到了解决方案:
在组件中:
takePhoto(){
const options: CameraOptions = {
quality: 100,
targetHeight: 320,
targetWidth: 320,
destinationType: this.camera.DestinationType.FILE_URI,
sourceType: this.camera.PictureSourceType.CAMERA,
encodingType: this.camera.EncodingType.JPEG,
mediaType: this.camera.MediaType.PICTURE
}
this.camera.getPicture(options).then((imgFileUri) => {
this.myImg = (<any>window).Ionic.WebView.convertFileSrc(imgFileUri);
}, (err) => {
console.log(err);
});
}
在html中:
<img [src]="myImg" />
注意: cordova-plugin-ionic-webview> = 4
答案 3 :(得分:-1)
通过以下方式修改您的 home.ts ,
private openGallery(): void {
let cameraOptions = {
sourceType: this.camera.PictureSourceType.PHOTOLIBRARY,
destinationType: this.camera.DestinationType.FILE_URI,
quality: 100,
targetWidth: 1000,
targetHeight: 1000,
encodingType: this.camera.EncodingType.JPEG,
correctOrientation: true
}
this.camera.getPicture(cameraOptions)
.then(file_uri => this.imageSrc = file_uri,
err => console.log(err));
}
在您的html文件中,
<img [src]="imageSrc"/>