本地数据缓存，增加默认识别标记

Tevin

2021-11-30 12d96556919c652c9592e9e215c01f1ac58b7eb5

 forms/imagePicker/CImagePicker.vue

@@ -7,92 +7,160 @@
    <view class="c-image-picker">
        <AtInput
            ref="input"
            :name="itemData.name"
            :title="itemData.label"
            :required="itemData.required"
            :error="itemData.error"
            :name="itemRes.name"
            :title="itemRes.label"
            :required="itemRes.required"
            :error="itemRes.error"
        />
        <AtImagePicker
            ref="picker"
            multiple
            mode="aspectFit"
            :count="9"
            :multiple="count > 1"
            :count="count"
            :showAddBtn="!selectedFull"
            :length="3"
            :files="files"
            :onChange="(files,operationType,index)=>handleChange(files,operationType,index)"
            :onFail="evt=>handleFail(evt)"
            :onImageClick="(index, file)=>handleImgView(index,file)"
        />
        <AtCurtain
            class="c-image-picker-view"
            closeBtnPosition="top-right"
            :isOpened="showImg"
            :onClose="evt=>handleImgClose()"
        >
            <image
                class="img"
                mode="aspectFit"
                :src="curtainImg"
            />
        </AtCurtain>
        <CImageCompressor ref="compressor" />
    </view>
</template>

<script>
import Taro from '@tarojs/taro';
import { $ } from '@tarojs/extend';
import { AtInput, AtImagePicker, AtCurtain } from 'taro-ui-vue';
import { $fetchCommon } from '@fetchers/FCommon';
import { Tools } from '@components/common/Tools';
import CImageCompressor from './CImageCompressor.vue';
import './cImagePicker.scss';

export default {
    name: 'CImagePicker',
    components: {
        CImageCompressor,
        AtInput,
        AtImagePicker,
        AtCurtain,
    },
    props: {
        itemData: Object,
        // 表单数据资源（表单组件内部机制专用）
        itemRes: Object,
        // 最大图片张数
        count: {
            type: Number,
            default: 1,
        },
    },
    data() {
        return {
            showImg: false,
            curtainImg: '',
        };
        return {};
    },
    computed: {
        files() {
            const value = this.itemData.formData[this.itemData.name];
            const value = this.itemRes.formData[this.itemRes.name];
            let files = [];
            if (Object.prototype.toString.call(value) === '[object String]') {
                files = value.split(',').map((url) => ({ url }));
                files = value.split(',').map(url => ({ url }));
            } else if (Object.prototype.toString.call(value) === '[object Array]') {
                files = value.map((url) => ({ url }));
                files = value.map(url => ({ url }));
            }
            files.push({ type: 'btn' });
            return files;
        },
        selectedFull() {
            return this.files.length >= this.count;
        },
    },
    methods: {
        handleChange(files, operationType, index) {
            if (operationType === 'add') {
            }
        _triggerChange(files) {
            const value = [];
            files.forEach((file) => {
                if (file.type === 'btn') {
                    return;
                }
            files.forEach(file => {
                value.push(file.url);
            });
            this.itemData.onChange(value);
            this.itemRes.onChange(value);
        },
        handleChange(files, operationType, index) {
            // 添加图片
            if (operationType === 'add') {
                // 屏蔽其他格式
                let nextFiles = files.filter(file => {
                    // 新添加
                    if (file.file && file.file.originalFileObj) {
                        if (
                            /image\/(gif|png|jpg|jpeg)/.test(
                                file.file.originalFileObj.type
                            )
                        ) {
                            return true;
                        } else {
                            Tools.toast('不支持的格式，请选择其他图片！');
                            return false;
                        }
                    }
                    // 非本次添加的图片
                    else {
                        return true;
                    }
                });
                // 限制数量
                if (nextFiles.length > this.count) {
                    Tools.toast('最多只能选 ' + this.count + ' 张图片！');
                    nextFiles = nextFiles.splice(0, this.count);
                }
                // 检查是否需要压缩
                const needs = nextFiles
                    .map((file, needIndex) => {
                        const fileInfo = file.file;
                        // 没有 file 信息对象，或者不是 blob 类型
                        if (!fileInfo || fileInfo.path.indexOf('blob') < 0) {
                            return false;
                        }
                        // 尺寸小于 1M 的图片
                        if (fileInfo.size < 1 * 1024 * 1024) {
                            return false;
                        }
                        return [fileInfo, needIndex];
                    })
                    .filter(Boolean);
                // 存在需要压缩的图片，一次性压缩
                if (needs.length > 0) {
                    const files2 = [...nextFiles];
                    const needPaths = needs.map(need => need[0].path);
                    this.$refs.compressor.$compress(needPaths, compressedFiles => {
                        compressedFiles.forEach((cpPath, cpIndex) => {
                            const filesIndex = needs[cpIndex][1];
                            files2[filesIndex] = {
                                url: cpPath.compress,
                            };
                        });
                        this._triggerChange(files2);
                    });
                }
                // 不存在，直接显示
                else {
                    this._triggerChange(nextFiles);
                }
            }
            // 删除图片，直接显示
            else {
                this._triggerChange(files);
            }
        },
        handleImgView(index, file) {
            this.curtainImg = file.url;
            this.showImg = true;
            const urls = this.files
                .map(file => (file.type === 'btn' ? false : file.url))
                .filter(Boolean);
            Taro.previewImage({
                current: file.url, // 当前显示图片的http链接
                urls, // 需要预览的图片http链接列表
            });
        },
        handleImgClose() {
            this.showImg = false;
        },
        handleFail(msg) {
            console.log(msg);
            Taro.showToast({
                title: msg,
                icon: 'none',
@@ -100,9 +168,76 @@
                duration: 2000,
            });
        },
        $uploadImage(callback) {
            const url = $fetchCommon.getUploadImgURL();
            const uploadTeam = [];
            const imgs = [];
            this.files.forEach(file => {
                if (file.type === 'btn') {
                    return;
                }
                // blob 临时文件才上传
                if (file.url.indexOf('blob') >= 0) {
                    uploadTeam.push(
                        new Promise((resolve, reject) => {
                            Taro.uploadFile({
                                url,
                                filePath: file.url,
                                name: 'file',
                                formData: {},
                                success(res) {
                                    const res2 =
                                        typeof res.data === 'string'
                                            ? JSON.parse(res.data)
                                            : res.data;
                                    if (res2.state.code === 2000) {
                                        resolve(
                                            $fetchCommon.transImgPath(
                                                'fix',
                                                res2.data.src
                                            )
                                        );
                                    } else {
                                        reject({ message: res2.state.msg });
                                    }
                                },
                                cancel() {
                                    reject({ message: '上传图片已取消！' });
                                },
                                fail() {
                                    reject({ message: '上传图片失败！' });
                                },
                            });
                        })
                    );
                }
                // 其他类型视为 url，忽略
                else {
                    uploadTeam.push(Promise.resolve(file.url));
                }
            });
            Promise.all(uploadTeam)
                .then(res => {
                    this.itemRes.onChange(res);
                    setTimeout(() => {
                        callback('success');
                    }, 0);
                })
                .catch(err => {
                    callback('error', err);
                });
        },
    },
    mounted() {
        $(this.$refs.input.$el).find('.at-input__input').prepend(this.$refs.picker.$el);
        if (process.env.TARO_ENV === 'h5') {
            $(this.$refs.input.$el)
                .find('.at-input__input')
                .prepend(this.$refs.picker.$el);
        } else if (process.env.TARO_ENV === 'weapp') {
            $(this.$refs.input.$el)
                .find('.at-input__container')
                .append(this.$refs.picker.$el);
        }
    },
};
</script>