90 lines
2.1 KiB
Markdown
90 lines
2.1 KiB
Markdown
<cn>
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#### 用户头像
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点击上传用户头像，并使用 `beforeUpload` 限制用户上传的图片格式和大小。
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`beforeUpload` 的返回值可以是一个 Promise 以支持也支持异步检查
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</cn>
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<us>
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#### Avatar
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Click to upload user's avatar, and validate size and format of picture with `beforeUpload`.
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The return value of function `beforeUpload` can be a Promise to check asynchronously.
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</us>
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```html
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<template>
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<a-upload
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name="avatar"
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listType="picture-card"
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class="avatar-uploader"
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:showUploadList="false"
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action="//jsonplaceholder.typicode.com/posts/"
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:beforeUpload="beforeUpload"
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@change="handleChange"
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>
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<img v-if="imageUrl" :src="imageUrl" alt="" />
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<div v-else>
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<a-icon :type="loading ? 'loading' : 'plus'" />
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<div class="ant-upload-text">Upload</div>
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</div>
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</a-upload>
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</template>
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<script>
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function getBase64 (img, callback) {
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const reader = new FileReader()
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reader.addEventListener('load', () => callback(reader.result))
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reader.readAsDataURL(img)
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}
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export default {
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data () {
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return {
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loading: false,
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imageUrl: '',
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}
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},
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methods: {
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handleChange (info) {
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if (info.file.status === 'uploading') {
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this.loading = true
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return
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}
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if (info.file.status === 'done') {
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// Get this url from response in real world.
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getBase64(info.file.originFileObj, (imageUrl) => {
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this.imageUrl = imageUrl
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this.loading = false
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})
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}
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},
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beforeUpload (file) {
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const isJPG = file.type === 'image/jpeg'
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if (!isJPG) {
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this.$message.error('You can only upload JPG file!')
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}
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const isLt2M = file.size / 1024 / 1024 < 2
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if (!isLt2M) {
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this.$message.error('Image must smaller than 2MB!')
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}
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return isJPG && isLt2M
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},
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},
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}
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</script>
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<style>
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.avatar-uploader > .ant-upload {
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width: 128px;
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height: 128px;
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}
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.ant-upload-select-picture-card i {
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font-size: 32px;
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color: #999;
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}
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.ant-upload-select-picture-card .ant-upload-text {
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margin-top: 8px;
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color: #666;
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}
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</style>
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```
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