taro 长按保存照片到系统相册getImageInfo、saveImageToPhotosAlbum

短命女 2021-07-24 19:31 618阅读 0赞

(1)通过长按事件获取到照片路径(或ref获取dom对象)
    		因通e无法获取到src属性,固添加自定义属性为照片url地址
    		<Image className='m-i' data-url={'xx.jpg'} onLongPress={this._LongPress}  src='xx.jpg'/>
    	
    	(2)onLongPress长按事件中获取到照片url
    		e.target.dataset.url
    	
    	(3)通过Taro.getImageInfo获取到照片的本地路径
    		Taro.getImageInfo({
    			src:'图片的路径，可以是相对路径、临时文件路径、存储文件路径、网络图片路径',
    			success(res)
    			{
    				res.path获取到照片的本地路径
    			}
    			
    		})
    	
    	(4)通过Taro.saveImageToPhotosAlbum,将照片保存到系统相册
    		Taro.saveImageToPhotosAlbum({
    			filePath:'图片文件路径，可以是临时文件路径或永久文件路径，不支持网络图片路径',
    			success(res)
    			{
    				...
    			}
    		})

保存图片底部面报提示、图片授权、以及未授权引导授权、保存成功提示完整代码:

import Taro from '@tarojs/taro'
    import { View,Text,Image,OpenData,} from '@tarojs/components'
    import React,{ Component} from 'react'
    import { connect} from 'react-redux'
    
    import './index.less'
    
    import Avator from './child/avator'
    import Card from './child/card'
    
    class Mine extends Component{ 
    
        componentDidMount()
        { 
        }
    
        //长按保存图片到系统相册底部面报提示
        _LongPress=(e)=>{ 
            let that=this;
            Taro.showActionSheet({ 
                itemList:['保存到系统相册','取消'],
                success(res)
                {    
                    //保存到系统相册
                    if(res.tapIndex==0)
                    { 
                        that._saveImageAuthorize(e.target.dataset.url)
                    }else{ 
                        //取消保存
                    }
                }
            })
        }
    
        //保存到系统相册授权
        _saveImageAuthorize(url)
        { 
            // console.log(url);
            let that=this;
            Taro.getSetting({ 
                success(res)
                { 
                    //未授权
                    if(!res.authSetting['scope.writePhotosAlbum'])
                    { 
                        Taro.authorize({ 
                            scope: 'scope.writePhotosAlbum',
                            success: function () { 
                              //同意授权
                              that._saveImage(url);
                            },
                            //拒绝授权引导手动开启
                            fail()
                            { 
                                Taro.showModal({ 
                                    title:'提示',
                                    confirmText:'确认',
                                    cancelText:'取消',
                                    content:'是否开启相册权限',
                                    success(res)
                                    { 
                                        if(res.confirm)
                                        { 
                                          Taro.openSetting();
                                        }else if(res.cancel)
                                        { 
                                          
                                        }
                                    }
    
                                })
                            }
                        })
                    //已授权
                    }else{ 
                        that._saveImage(url);
                    }
                }
            })
    
        }
    
        //将照片保存到系统相册
        _saveImage(url)
        { 
            console.log(url);
            Taro.getImageInfo({ 
                src:url,
                success(res)
                { 
                    Taro.saveImageToPhotosAlbum({ 
                        filePath:res.path,
                        success()
                        { 
                            Taro.showToast({ 
                                title:'已保存到系统相册'
                            })
                        }
                    })
                }
            });
        }
    
        render()
        { 
            const { name,avator} = this.props;
            return(
    
                <View className='m-c'>
                    <Image className='m-i' data-url={ 'https://dss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=3213420747,3920605119&fm=26&gp=0.jpg'} onLongPress={ this._LongPress}  src='https://dss2.bdstatic.com/70cFvnSh_Q1YnxGkpoWK1HF6hhy/it/u=3213420747,3920605119&fm=26&gp=0.jpg'/>
                    { /* <OpenData type='userAvatarUrl'/> */}
                </View>
            )
        }
    }
    
    const mapStateToProps=(state)=>{ 
        return{ 
            name:state.user.username,
            avator:state.user.avator
        }
    }
    
    export default connect(mapStateToProps)(Mine)