vue 实现打开带水印的相机
时间: 2023-07-20 16:27:44 浏览: 71
您可以使用`Vue.js`和`HTML5`的`MediaDevices.getUserMedia()`方法来实现打开带水印的相机应用程序。以下是实现此目标的步骤:
1. 建立Vue.js应用程序并导入所需的库。
```javascript
import Vue from 'vue'
import watermark from 'watermarkjs'
```
2. 在Vue.js模板中呈现带有水印的视频元素和拍照按钮。
```html
<template>
<div>
<video ref="video" autoplay></video>
<button @click="takePicture">Take Picture</button>
</div>
</template>
```
3. 在Vue.js组件中初始化视频元素和水印。
```javascript
export default {
mounted() {
this.initCamera()
this.initWatermark()
},
methods: {
initCamera() {
navigator.mediaDevices.getUserMedia({ video: true })
.then(stream => {
const video = this.$refs.video
video.srcObject = stream
video.onloadedmetadata = () => {
video.play()
}
})
},
initWatermark() {
const video = this.$refs.video
const canvas = document.createElement('canvas')
const ctx = canvas.getContext('2d')
const wm = watermark([video, 'watermark text'], {
init(img) {
canvas.width = img.naturalWidth
canvas.height = img.naturalHeight
},
render(img, data) {
ctx.drawImage(img, 0, 0)
ctx.font = 'bold 32px Arial'
ctx.fillStyle = 'white'
ctx.fillText(data[1], 10, canvas.height - 10)
}
})
setInterval(() => {
wm.render()
video.srcObject = canvas.captureStream()
}, 1000)
},
takePicture() {
const video = this.$refs.video
const canvas = document.createElement('canvas')
canvas.width = video.videoWidth
canvas.height = video.videoHeight
const ctx = canvas.getContext('2d')
ctx.drawImage(video, 0, 0, canvas.width, canvas.height)
const image = canvas.toDataURL()
console.log(image)
}
}
}
```
4. 运行应用程序并单击“Take Picture”按钮以拍摄照片。
这样,您就可以在Vue.js应用程序中创建带有水印的相机应用程序。请注意,此示例仅适用于最新版本的Chrome和Firefox浏览器。