百度智能小程序选择图片或使用相机拍照

2020-09-05 14:17 更新

swan.chooseImage

解释：从本地相册选择图片或使用相机拍照。

方法参数

Object object

object 参数说明

属性名	类型	必填	默认值	说明
count	Number	否	9	最多可以选择的图片张数
sizeType	Array.<string>	否		original 原图，compressed 压缩图，默认二者都有
sourceType	Array.<string>	否		album 从相册选图，camera 使用相机，默认二者都有
success	Function	否		成功则返回图片的本地文件路径列表 tempFilePaths
fail	Function	否		接口调用失败的回调函数
complete	Function	否		接口调用结束的回调函数（调用成功、失败都会执行）

success 返回参数说明

参数	类型	说明	Web 态说明
tempFilePaths	Array.< string>	图片的本地文件路径列表	Web 态值为浏览器所支持的 blob URL 数组，形如 `["blob:https://xxx"]`
tempFiles	Array.<object>	图片的本地文件列表，每一项是一个 File 对象	-

tempFiles 对象结构如下

字段	类型	说明	Web 态说明
path	String	本地文件路径	Web 态值为浏览器所支持的 blob URL 数组，示例 `"blob:https://9zs64x.smartapps.cn/52f855e3-2d9d-49b5-aeb4-96534135f0a9"`
size	Number	本地文件大小（单位：B）	-

示例

图片示例

代码示例 1：tempFilePaths

在开发者工具中打开

<view class="wrap">
    <view class="card-area">
        <view s-if="{{imageList.length > 0}}" class="image-container" style="height: {{imageList.length > 6 ? '3.54' : '2.55'}}rem;">
            <image s-for="image in imageList" class="image-items" style="height: {{imageList.length > 6 ? '32' : '49'}}%;" src="{{image}}" mode="scaleToFill" data-src="{{image}}" bindtap="previewImage"></image>
        </view>
        <view s-else class="display-area">
            图片显示区
        </view>
        <view class="middle-area border-top">
            <view class="list-area border-bottom" hover-class="option-active">
                <text class="list-item-key-4">图片来源</text>
                <picker class="list-item-value" mode="selector" value="{{sourceIndex}}" range="{{sourceArray}}" bind:change="sourceChange">
                    <view hover-class="hover">{{sourceArray[sourceIndex]}}</view>
                </picker>
            </view>
            <view class="list-area border-bottom" hover-class="option-active">
                <text class="list-item-key-4">图片质量</text>
                <picker class="list-item-value" mode="selector" value="{{sizeIndex}}" range="{{sizeArray}}" bind:change="sizeChange">
                    <view hover-class="hover">{{sizeArray[sizeIndex]}}</view>
                </picker>
            </view>
            <view class="list-area border-bottom" hover-class="option-active">
                <text class="list-item-key-4">图片数量</text>
                <picker class="list-item-value" mode="selector" value="{{countIndex}}" range="{{countArray}}" bind:change="countChange">
                    <view hover-class="hover">{{countArray[countIndex]}}</view>
                </picker>
            </view>
        </view>
        <view class="button-group">
            <button type="primary" bindtap="selectImage">添加图片</button>
            <button type="default" bindtap="clearImage">清空图片</button>
        </view>
    </view>
</view>

Page({
    data: {
        sourceIndex: 2,
        sourceArray: ['拍照', '相册', '拍照或相册'],
        sizeIndex: 2,
        sizeArray: ['压缩', '原图', '压缩或原图'],
        countIndex: 0,
        countArray: [],
        imageList: []
    },
    onLoad(e) {
        const array = [];
        for (let i = 0; i < 9; i++) {
            array.push(i + 1);
        }
        this.setData({
            countIndex: array.length - 1,
            countArray: array
        });
    },
    sourceChange(e) {
        this.setData('sourceIndex', e.detail.value);
    },
    sizeChange(e) {
        this.setData('sizeIndex', e.detail.value);
    },
    countChange(e) {
        this.setData('countIndex', e.detail.value);
    },
    selectImage() {
        const sourceIndex = this.data.sourceIndex;
        const count = this.data.countIndex + 1;
        if (sourceIndex === 2) {
            swan.showActionSheet({
                itemList: ['拍照', '相册'],
                success: res => {
                    const sourceType = res.tapIndex === 0 ? 'camera' : 'album';
                    this.chooseImage(sourceType, count);
                }
            });
        } else {
            const sourceType = sourceIndex === 0 ? 'camera' : 'album';
            this.chooseImage(sourceType, count);
        }
    },
    chooseImage(sourceType, count) {
        const sizeIndex = this.data.sizeIndex;
        let sizeType = ['compressed', 'original'];
        if (sizeIndex === 0) {
            sizeType = ['compressed'];
        } else if (sizeIndex === 1) {
            sizeType = ['original'];
        }

        swan.chooseImage({
            count,
            sizeType,
            sourceType: [sourceType],
            success: res => {
                this.setData('imageList', res.tempFilePaths);
                console.log('res.tempFilePaths', res.tempFilePaths);
            },
            fail: err => {
                console.log('chooseImage fail', err);
            }
        });
    },
    clearImage() {
        const imageList = this.data.imageList;
        if (imageList.length > 0) {
            this.setData('imageList', []);
            swan.showToast({title: '清空图片成功'});
        } else {
            swan.showToast({title: '无可清空图片', icon: 'none'});
        }
    },
    previewImage(e) {
        swan.showToast({title: '暂不支持预览', icon: 'none'});
    }
});

代码示例 2：tempFiles

在开发者工具中打开

<view class="wrap">
    <view class="card-area">
        <view s-if="{{imageList.length > 0}}" class="image-container" style="height: {{imageList.length > 6 ? '3.54' : '2.55'}}rem;">
            <image s-for="image in imageList" class="image-items" style="height: {{imageList.length > 6 ? '32' : '49'}}%;" src="{{image}}" mode="scaleToFill" data-src="{{image}}" bindtap="previewImage"></image>
        </view>
        <view s-else class="display-area">
            图片显示区
        </view>
        <view class="middle-area border-top">
            <view class="list-area border-bottom" hover-class="option-active">
                <text class="list-item-key-4">图片来源</text>
                <picker class="list-item-value" mode="selector" value="{{sourceIndex}}" range="{{sourceArray}}" bind:change="sourceChange">
                    <view hover-class="hover">{{sourceArray[sourceIndex]}}</view>
                </picker>
            </view>
            <view class="list-area border-bottom" hover-class="option-active">
                <text class="list-item-key-4">图片质量</text>
                <picker class="list-item-value" mode="selector" value="{{sizeIndex}}" range="{{sizeArray}}" bind:change="sizeChange">
                    <view hover-class="hover">{{sizeArray[sizeIndex]}}</view>
                </picker>
            </view>
            <view class="list-area border-bottom" hover-class="option-active">
                <text class="list-item-key-4">图片数量</text>
                <picker class="list-item-value" mode="selector" value="{{countIndex}}" range="{{countArray}}" bind:change="countChange">
                    <view hover-class="hover">{{countArray[countIndex]}}</view>
                </picker>
            </view>
        </view>
        <view class="button-group">
            <button type="primary" bindtap="selectImage">添加图片</button>
            <button type="default" bindtap="clearImage">清空图片</button>
        </view>
    </view>
</view>

Page({
    data: {
        sourceIndex: 2,
        sourceArray: ['拍照', '相册', '拍照或相册'],
        sizeIndex: 2,
        sizeArray: ['压缩', '原图', '压缩或原图'],
        countIndex: 0,
        countArray: [],
        imageList: []
    },
    onLoad(e) {
        const array = [];
        for (let i = 0; i < 9; i++) {
            array.push(i + 1);
        }
        this.setData({
            countIndex: array.length - 1,
            countArray: array
        });
    },
    sourceChange(e) {
        this.setData('sourceIndex', e.detail.value);
    },
    sizeChange(e) {
        this.setData('sizeIndex', e.detail.value);
    },
    countChange(e) {
        this.setData('countIndex', e.detail.value);
    },
    selectImage() {
        const sourceIndex = this.data.sourceIndex;
        const count = this.data.countIndex + 1;
        if (sourceIndex === 2) {
            swan.showActionSheet({
                itemList: ['拍照', '相册'],
                success: res => {
                    const sourceType = res.tapIndex === 0 ? 'camera' : 'album';
                    this.chooseImage(sourceType, count);
                }
            });
        } else {
            const sourceType = sourceIndex === 0 ? 'camera' : 'album';
            this.chooseImage(sourceType, count);
        }
    },
    chooseImage(sourceType, count) {
        const sizeIndex = this.data.sizeIndex;
        let sizeType = ['compressed', 'original'];
        if (sizeIndex === 0) {
            sizeType = ['compressed'];
        } else if (sizeIndex === 1) {
            sizeType = ['original'];
        }

        swan.chooseImage({
            count,
            sizeType,
            sourceType: [sourceType],
            success: res => {
                console.log('res.tempFiles',res.tempFiles);
                let imageList = [];
                res.tempFiles.forEach((e)=>{ 
                    imageList.push(e.path)
                })
                this.setData('imageList', imageList);
            },
            fail: err => {
                console.log('chooseImage fail', err);
            }
        });
    },
    clearImage() {
        const imageList = this.data.imageList;
        if (imageList.length > 0) {
            this.setData('imageList', []);
            swan.showToast({title: '清空图片成功'});
        } else {
            swan.showToast({title: '无可清空图片', icon: 'none'});
        }
    },
    previewImage(e) {
        swan.showToast({title: '暂不支持预览', icon: 'none'});
    }
});