react-native 底部弹窗选项卡 + 上传图片 +预览图片

向右看齐 2021-08-13 20:56 331阅读 0赞

效果图，  
支持默认图片，上传中的状态，最大上传数量，预览大图等功能  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzIwNjk0OQ_size_16_color_FFFFFF_t_70]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzIwNjk0OQ_size_16_color_FFFFFF_t_70 1]

import React, {  Component } from "react";
    import { 
      StyleSheet,
      View,
      Text,
      Image,
      TouchableOpacity,
      Modal,
      Platform
    } from "react-native";
    import {  scaleSizeW, setSpText, uploadImag } from "../utils/util";
    import ToastBox from "../utils/Toast";
    import ActionSheet from "react-native-actionsheet";
    import Toast from "../utils/Toast";
    import config from "../utils/config";
    import ImageViewer from "react-native-image-zoom-viewer";
    
    /*
     * maxNum  (number)上传的最大数量
     * onChange (fun) 返回文件列表arrary
     * actionText  + 下面的文字
     * noRequire  选传
     * initList 已有的图片数组
     */
    export default class ImgUpLoad extends Component { 
      constructor(props) { 
        super(props);
        this.state = { 
          flieLists: [],
          visible: false,
          upLoadState: 2 //1上传中 2上传完成
        };
      }
      componentWillMount() { 
        const {  initList, size } = this.props;
        console.log(initList);
        let flieLists = initList ? initList : [];
        this.setState({ 
          flieLists
        });
      }
      feedBack = () => { 
        // this.props.onChange && this.props.onChange(this.state.flieLists);
        if (this.props.onChange) { 
          let arr = [...this.state.flieLists];
          // console.log("feedBack: ",arr)
          this.props.onChange(arr);
        }
      };
      // 打开相册
      selectFromAblum(type) { 
        const {  userInfo, setUserInfo } = this.props;
        uploadImag(type, image => { 
          // const param = `data:${ image.mime};base64,${ image.data}`;
          console.log(image);
          let maxSize = image.size / 1024 / 1024, // MB
            minSize = image.size / 1024; // KB
          if (maxSize > 1) { 
            ToastBox.showTop("图片大小不符合要求，请重新选择");
            return;
          }
          // ToastBox.showTop(`${ image.size}`)
          if(Platform.OS=='android'){ 
            let DateName = new Date().getTime();
            image.filename = DateName + ".jpg";
          }
          
          let file = { 
            uri: image.path,
            type: "multipart/form-data",
            name: image.filename
          };
          let formData = new FormData();
          formData.append("file", file);
          this.setState({ 
            upLoadState: 1
          });
          fetch(config.uploadImg, { 
            method: "post",
            body: formData,
            headers: { 
              "Content-Type": "multipart/form-data;charset=utf-8"
            }
            // body: JSON.stringify({ 
            //   base64Str:param
            // }),
          })
            .then(res => { 
              console.log(res);
              // console.log(res.text())
              return res.json();
            })
            .then(response => { 
              console.log(response);
              if (response.code == 0) { 
                this.setState({ 
                  upLoadState: 2
                });
                console.log(response.data.uri);
                let myfile = response.data.uri;
                let flieLists = [...this.state.flieLists];
                flieLists.push(myfile);
                this.setState({  flieLists }, () => { 
                  this.feedBack();
                });
              }
            })
            .catch(err => { 
              console.log(err);
              ToastBox.showTop("图片上传失败，请重试");
              this.setState({ 
                upLoadState: 2
              });
            });
        });
      }
    
      takePhoto(type) { 
        const {  userInfo, setUserInfo } = this.props;
        uploadImag(type, image => { 
          // const param = `data:${ image.mime};base64,${ image.data}`;
          // console.log(param)
          console.log(image);
          let maxSize = image.size / 1024 / 1024, // MB
            minSize = image.size / 1024; // KB
          let filename;
          if (maxSize > 1) { 
            ToastBox.showTop("图片大小不符合要求，请重试");
            return;
          }
          // ToastBox.showTop(`${ image.size}`)
          let DateName = new Date().getTime();
          filename = DateName + ".jpg";
          let file = { 
            uri: image.path,
            type: "multipart/form-data",
            name: filename
          };
          this.setState({ 
            upLoadState: 1
          });
          let formData = new FormData();
          formData.append("file", file);
    
          fetch(config.uploadImg, { 
            method: "post",
            body: formData,
            headers: { 
              "Content-Type": "multipart/form-data;charset=utf-8"
            }
            // body: JSON.stringify({ 
            //   base64Str:param
            // }),
          })
            .then(res => res.json())
            .then(response => { 
              if (response.code == 0) { 
                // ToastBox.showTop(`图片上传成功：${ JSON.stringify( response)}`)
                let myfile = response.data.uri;
                let flieLists = [...this.state.flieLists];
                flieLists.push(myfile);
                this.setState({  flieLists, upLoadState: 2 }, () => { 
                  this.feedBack();
                });
              }
            })
            .catch(err => { 
              console.log(err);
              ToastBox.showTop("图片上传失败，请重试");
              this.setState({ upLoadState: 2})
            });
        });
      }
      // 开打底部选项卡
      showActionSheet = () => { 
        if (this.props.maxNum && this.state.flieLists.length >= this.props.maxNum) { 
          Toast.show("上传数量达到极限");
          return;
        }
        this.ActionSheet.show();
      };
      // 删除图片
      delImg = index => { 
        let flieLists = [...this.state.flieLists];
        flieLists.splice(index, 1);
        console.log(flieLists);
        this.setState({  flieLists: flieLists }, () => { 
          this.feedBack();
        });
      };
      render() { 
        const {  flieLists, visible, upLoadState } = this.state;
        const {  maxNum, actionText, size, noRequire, initList } = this.props;
        if (size) { 
          let num = scaleSizeW(size);
          console.log(num)
          styles.upLoadItem = {  ...styles.upLoadItem, width: num, height: num };
          styles.image = {  ...styles.image, width: num, height: num };
        }
        console.log(flieLists);
        return (
          <View style={ styles.upLoad}>
            { flieLists.length > 0 &&
              flieLists.map((item, index) => { 
                console.log(item);
                const images = [
                  { 
                    // Simplest usage.
                    url: item
                  }
                ];
                return (
                  <TouchableOpacity
                    onPress={ () => { 
                      this.setState({  visible: true });
                    }}
                    key={ index}
                    style={ styles.upLoadItem}
                  >
                    <Image source={ {  uri: item }} style={ styles.image} />
                    <Modal
                      style={ {  width: "100%", height: "100%" }}
                      visible={ visible}
                      transparent
                    >
                      <ImageViewer
                        backgroundColor={ "rgba(0,0,0,0.8)"}
                        onClick={ () => { 
                          this.setState({  visible: false });
                        }}
                        imageUrls={ images}
                      />
                    </Modal>
                    <Text
                      style={ styles.close}
                      onPress={ () => { 
                        this.delImg(index);
                      }}
                    >
                      { "\ue613"}
                    </Text>
                  </TouchableOpacity>
                );
              })}
            { /* 超过最大数隐藏上传 */}
            { maxNum > flieLists.length && (
              <TouchableOpacity
                activeOpacity={ 1}
                onPress={ () => { 
                  this.showActionSheet();
                }}
              >
                { upLoadState == 2 && (
                  <View style={ [styles.upLoadItem, styles.addBtn]}>
                    <Text style={ styles.add}>{ "\ue612"}</Text>
                    <Text style={ styles.addText}>
                      { actionText ? actionText : "上传"}
                    </Text>
                    { noRequire && <Text style={ styles.otherText}>(选传)</Text>}
                  </View>
                )}
                { upLoadState == 1 && (
                  <View style={ [styles.upLoadItem, styles.loadingImgWrap]}>
                    <Image
                      style={ styles.loadingImg}
                      source={ require("../assets/image/timg.gif")}
                    ></Image>
                  </View>
                )}
              </TouchableOpacity>
            )}
            <ActionSheet
              ref={ o => (this.ActionSheet = o)}
              options={ ["拍照", "从相册上传", "取消"]}
              cancelButtonIndex={ 2}
              destructiveButtonIndex={ 1}
              onPress={ index => { 
                if (index === 0) { 
                  this.takePhoto(1);
                } else if (index === 1) { 
                  this.selectFromAblum(2);
                }
              }}
            />
          </View>
        );
      }
    }
    const styles = StyleSheet.create({ 
      upLoad: { 
        // width: "100%",
        flexDirection: "row",
        flexWrap: "wrap",
        // paddingLeft: scaleSizeW(20),
        paddingTop: scaleSizeW(20)
        // justifyContent: "flex-start"
      },
      upLoadItem: { 
        width: scaleSizeW(204),
        height: scaleSizeW(204),
        borderRadius: scaleSizeW(8),
        borderColor: "#ccc",
        borderWidth: StyleSheet.hairlineWidth,
        justifyContent: "center",
        alignItems: "center",
        marginRight: scaleSizeW(20),
        marginBottom: scaleSizeW(20),
        position: "relative"
      },
      loadingImgWrap: { 
        backgroundColor: "#fff"
      },
      loadingImg: { 
        width: scaleSizeW(100),
        height: scaleSizeW(100),
        borderRadius: scaleSizeW(8)
      },
      addBtn: { 
        borderStyle: "dashed",
        backgroundColor: "rgba(247,250,253,1)"
      },
      image: { 
        width: scaleSizeW(204),
        height: scaleSizeW(204),
        borderRadius: scaleSizeW(8)
      },
      add: { 
        fontFamily: "iconfont",
        fontSize: setSpText(40),
        color: "#8595A6"
      },
      addText: { 
        color: "#FF6737",
        fontSize: setSpText(24),
        textAlign: "center"
      },
      otherText: { 
        fontSize: scaleSizeW(24),
        color: "rgba(76,154,255,0.6)",
        marginTop: scaleSizeW(8),
        position: "absolute",
        bottom: scaleSizeW(30),
        left: "50%",
        marginLeft: scaleSizeW(-30)
      },
      close: { 
        position: "absolute",
        right: scaleSizeW(12),
        zIndex: 10,
        top: scaleSizeW(12),
        fontSize: setSpText(50),
        fontFamily: "iconfont",
        color: "#999"
      }
    });

上传图片，拍照组件

import ImagePicker from 'react-native-image-crop-picker';
    /**
     * 上传图片
     * @param callback 上传成功后的回调函数
     */
    export function uploadImag(type,callback) { 
      if(type==1){ 
        ImagePicker.openCamera({ 
          cropping: false,
          compressImageQuality: 0.3,
          includeExif: true
        }).then((image) => { 
          callback(image)
        }).catch(err=>{ console.log(err)})
      }else if(type==2){ 
        ImagePicker.openPicker({ 
          cropping: false,
          compressImageQuality: 0.5,
          includeExif: true
        }).then((image) => { 
          callback(image)
        }).catch(err=>{ console.log(err)});
      }
    }
    
    export function uploadFile(callback) { 
      DocumentPicker.show(
        { 
          filetype: [DocumentPickerUtil.allFiles()]
        },
        (error, res) => { 
          if (error) { 
            Toast.message('上传文件失败');
          } else { 
            let source = { 
              uri: res.uri,
              type: 'multipart/form-data',
              name: res.fileName
            };
            let params = { 
              image: source,
              imageFileName: 'images'
            };
            Api.uploadFile(params).then(res => { 
              if (res.success) { 
                if (typeof callback === 'function') { 
                  callback(res);
                }
              } else { 
                Toast.message('上传图片失败');
              }
            });
          }
        }
      );
    }

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzIwNjk0OQ_size_16_color_FFFFFF_t_70 1]: /images/20210813/702c52933cbd4788a2fa6388fcc92b2e.png