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react-native-michael-image-picker

v0.3.3

Published

React-Native 多图片选择 支持裁剪 压缩

Downloads

7

Readme

react-native-syan-image-picker

npm npm npm npm

功能介绍

基于已有原生第三方框架封装的多图片选择组件,适用于 React Native App。

原生框架依赖

功能特点

  • 支持 iOS、Android 两端
  • 支持单选、多选
  • 可自定义裁剪区域大小,支持圆形裁剪
  • 可设置压缩质量
  • 可设置是否返回图片 base64 编码
  • 支持记录当前已选中的图片
  • 支持删除指定下标的图片

Live

安装使用

安装

// Step 1 基于 npm
npm install react-native-syan-image-picker --save

// 或是 yarn
yarn add react-native-syan-image-picker

// Step 2 执行 link
react-native link react-native-syan-image-picker

其他配置

iOS

1、添加原生框架中所需的 bundle 文件:
  • TARGETS -> Build Phases -> Copy Bundle Resources 点击"+"按钮,在弹出的窗口中点击“Add Other”按钮,选择
    node_modules/react-native-syan-image-picker/ios/TZImagePickerController/TZImagePickerController.bundle
2、添加相册相关权限:
  • 项目目录->Info.plist->增加
 Privacy - Camera Usage Description 是否允许此App使用你的相机进行拍照?
 Privacy - Photo Library Usage Description 请允许访问相册以选取照片
 Privacy - Photo Library Additions Usage Description 请允许访问相册以选取照片
 Privacy - Location When In Use Usage Description 我们需要通过您的地理位置信息获取您周边的相关数据
3、中文适配:
  • 添加中文 PROJECT -> Info -> Localizations 点击"+"按钮,选择Chinese(Simplified)

Android

1、在 build.gradle 中添加 maven { url "https://jitpack.io" }Google 配置:
buildscript {
    repositories {
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}
allprojects {
    repositories {
        mavenLocal()
        jcenter()
        maven { url "https://jitpack.io" }
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url "$rootDir/../node_modules/react-native/android"
        }
    }
}
2、在 AndroidManifest.xml 中添加权限:
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
3、更新到 PictureSelector 2.2.0 需要修改:
// app/build.gradle

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.3"
    ...
}

注意安装运行报错

  1. 检查自动 link 是否成功
  2. 使用 Android Studio 查看 MainApplication.java 文件是否添加 new RNSyanImagePickerPackage()
  3. 使用 Android Studio 打开项目检查 Gradle 是否同步完成
  4. 可以运行 ImagePickerExample 该 Demo,测试 Android 7.0,6.0 拍照选图都为正常

link失败手动添加

iOS

  1. In XCode, in the project navigator, right click LibrariesAdd Files to [your project's name]
  2. Go to node_modulesreact-native-syan-image-picker and add RNSyanImagePicker.xcodeproj
  3. In XCode, in the project navigator, select your project. Add libRNSyanImagePicker.a to your project's Build PhasesLink Binary With Libraries
  4. Run your project (Cmd+R)<

Android

  1. Open up android/app/src/main/java/[...]/MainApplication.java
  • Add import com.reactlibrary.RNSyanImagePickerPackage; to the imports at the top of the file
  • Add new RNSyanImagePickerPackage() to the list returned by the getPackages() method
  1. Append the following lines to android/settings.gradle:
    include ':react-native-syan-image-picker'
    project(':react-native-syan-image-picker').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-syan-image-picker/android')
  2. Insert the following lines inside the dependencies block in android/app/build.gradle:
      compile project(':react-native-syan-image-picker')

运行示例

相关 Demo 见 ImagePickerExample

配置参数说明

组件调用时,支持传入一个 options 对象,可设置的属性如下:

属性名 | 类型 | 是否可选 | 默认值 | 描述 ---------------- | ------ | -------- | ----------- | ----------- imageCount | int | 是 | 6 | 最大选择图片数目 isRecordSelected | bool | 是 | false | 记录当前已选中的图片 isCamera | bool | 是 | true | 是否允许用户在内部拍照 isCrop | bool | 是 | false | 是否允许裁剪,imageCount 为1才生效 CropW | int | 是 | screenW * 0.6 | 裁剪宽度,默认屏幕宽度60% CropH | int | 是 | screenW * 0.6 | 裁剪高度,默认屏幕宽度60% isGif | bool | 是 | false | 是否允许选择GIF,暂无回调GIF数据 showCropCircle | bool | 是 | false | 是否显示圆形裁剪区域 circleCropRadius | float | 是 | screenW * 0.5 | 圆形裁剪半径,默认屏幕宽度一半 showCropFrame | bool | 是 | true | 是否显示裁剪区域 showCropGrid | bool | 是 | false | 是否隐藏裁剪区域网格 quality | int | 是 | 90 | 压缩质量 enableBase64 | bool | 是 | false | 是否返回base64编码,默认不返回

返回结果说明

Callback 形式调用时,返回的第一个参数为错误对象,第二个才是图片数组:

属性名 | 类型 | 描述 ---------------- | ------ | ----------- error | object | 取消拍照时不为 null,此时 error.message == '取消' photos | array | 选择的图片数组

而以 Promise 形式调用时,则直接返回图片数组,在 catch 中去处理取消选择的情况。

下面是每张图片对象所包含的属性:

属性名 | 类型 | 描述 ---------------- | ------ | ----------- width | int | 图片宽度 height | int | 图片高度 uri | string | 图片路径 original_uri | string | 图片原始路径,仅 Android type | string | 文件类型,仅 Android,当前只返回 image size | int | 图片大小,单位为字节 b base64 | string | 图片的 base64 编码,如果 enableBase64 设置 false,则不返回该属性

方法调用

Callback

回调形式需调用 showImagePicker 方法:

import SyanImagePicker from 'react-native-michael-image-picker';

SyanImagePicker.showImagePicker(options, (err, selectedPhotos) => {
  if (err) {
    // 取消选择
    return;
  }
  // 选择成功,渲染图片
  // ...
})

Promise

非回调形式则使用 asyncShowImagePicker 方法:

import SyanImagePicker from 'react-native-michael-image-picker';

// promise-then
SYImagePicker.asyncShowImagePicker(options)
  .then(photos => {
    // 选择成功
  })
  .catch(err => {
    // 取消选择,err.message为"取消"
  })

// async/await
handleSelectPhoto = async () => {
  try {
    const photos = await SYImagePicker.asyncShowImagePicker(options);
    // 选择成功
  } catch (err) {
    // 取消选择,err.message为"取消"
  }
}

移除选中图片

在 React Native 页面移除选中的图片后,需调用 removePhotoAtIndex 方法,来删除原生中保存的图片数组,确保下次进入图片选择时,已选中的图片保持一致:

handleDeletePhoto = index => {
  const { selectedPhotos: oldPhotos } = this.state;
  const selectedPhotos = oldPhotos.filter((photo, photoIndex) => photoIndex !== index);
  // 更新原生图片数组
  SYImagePicker.removePhotoAtIndex(index);
  // 更新 RN 页面
  this.setState({ selectedPhotos });
}

移除全部选中图片

STImagePicke.removeAllPhoto()

调用相机

相机功能调用 openCamera 方法,一样支持 Callback 和 Promise 两种形式,结果参数也保持一致。

删除缓存

SYImagePicker.deleteCache();

帮助

加入 React-Native QQ群 397885169

非常感谢

LuckSiege

banchichen

ljunb

捐赠

随时欢迎!!☕️☕️☕️✨✨