图片编辑上传组件

1.引入swiper和vue-awesome-swiper插件

npm install vue-cropper 或者 yarn add vue-cropper

2.使用：
template:布局.

<template>
    <div>
        <div class="user-info-head" @click="editCropper()"><img v-bind:src="options.img" title="点击上传头像" class="img-circle img-lg" /></div>
        <el-dialog :title="title" :visible="open" width="800px" append-to-body @opened="modalOpened" @close="closeDialog">
            <el-row>
                <el-col :xs="24" :md="12" :style="{ height: '350px' }">
                    <vue-cropper
                        ref="cropper"
                        :img="options.img"
                        :info="true"
                        :autoCrop="options.autoCrop"
                        :autoCropWidth="options.autoCropWidth"
                        :autoCropHeight="options.autoCropHeight"
                        :fixedBox="options.fixedBox"
                        @realTime="realTime"
                        v-if="visible"
                    />
                </el-col>
                <el-col :xs="24" :md="12" :style="{ height: '350px' }">
                    <div class="avatar-upload-preview">
                        <img :src="previews.url" :style="previews.img" />
                    </div>
                </el-col>
            </el-row>
            <br />
            <el-row>
                <el-col :lg="2" :md="2">
                    <el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
                        <el-button size="small">
                            选择
                            <i class="el-icon-upload el-icon--right"></i>
                        </el-button>
                    </el-upload>
                </el-col>
                <el-col :lg="{ span: 1, offset: 2 }" :md="2">
                    <el-button icon="el-icon-plus" size="small" @click="changeScale(1)"></el-button>
                </el-col>
                <el-col :lg="{ span: 1, offset: 1 }" :md="2">
                    <el-button icon="el-icon-minus" size="small" @click="changeScale(-1)"></el-button>
                </el-col>
                <el-col :lg="{ span: 1, offset: 1 }" :md="2">
                    <el-button icon="el-icon-refresh-left" size="small" @click="rotateLeft()"></el-button>
                </el-col>
                <el-col :lg="{ span: 1, offset: 1 }" :md="2">
                    <el-button icon="el-icon-refresh-right" size="small" @click="rotateRight()"></el-button>
                </el-col>
                <el-col :lg="{ span: 2, offset: 6 }" :md="2">
                    <el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
                </el-col>
            </el-row>
        </el-dialog>
    </div>
</template>

<script>

import { VueCropper } from 'vue-cropper';

export default {
    components: { VueCropper },
    created() {},
    data() {
        return {
            open: false,
            // 是否显示cropper
            visible: false,
            // 弹出层标题
            title: '修改头像',
            options: {
                img: '', //裁剪图片的地址
                autoCrop: true, // 是否默认生成截图框
                autoCropWidth: 140, // 默认生成截图框宽度
                autoCropHeight: 140, // 默认生成截图框高度
                fixedBox: true // 固定截图框大小 不允许改变
            },
            previews: {}
        };
    },
    methods: {
       
        },
        // 编辑头像
        editCropper() {
            this.open = true;
        },
        // 打开弹出层结束时的回调
        modalOpened() {
            this.visible = true;
        },
        // 覆盖默认的上传行为
        requestUpload() {},
        // 向左旋转
        rotateLeft() {
            this.$refs.cropper.rotateLeft();
        },
        // 向右旋转
        rotateRight() {
            this.$refs.cropper.rotateRight();
        },
        // 图片缩放
        changeScale(num) {
            num = num || 1;
            this.$refs.cropper.changeScale(num);
        },
        // 上传预处理
        beforeUpload(file) {
            if (file.type.indexOf('image/') == -1) {
                this.$modal.msgError('文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。');
            } else {
                const reader = new FileReader();
                reader.readAsDataURL(file);
                reader.onload = () => {
                    this.options.img = reader.result;
                };
            }
        },
        // 上传图片
        uploadImg() {
            this.$refs.cropper.getCropBlob(data => {
                let formData = new FormData();
                formData.append('avatarfile', data);
                uploadAvatar(formData).then(response => {
                    if (response.status == 200) {
                        this.img();
                        this.$alert('修改成功');
                        this.visible = false;
                        this.open = false;
                    }
                });
            });
        },
        // 实时预览
        realTime(data) {
            this.previews = data;
        },
        // 关闭窗口
        closeDialog() {
            this.open = false;
        }
    }
};
</script>
<style scoped lang="less">
.user-info-head {
    position: relative;
    display: inline-block;
    height: 144px;
    width: 144px;
}

.user-info-head:hover:after {
    content: '+';
    position: absolute;
    left: 0px;
    right: 0;
    top: 0;
    bottom: 0;
    color: #eee;
    background: rgba(0, 0, 0, 0.5);
    font-size: 24px;
    font-style: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    cursor: pointer;
    line-height: 130px;
    border-radius: 50%;
    padding-left: 55px;
}
</style>