RN 使用第三方组件之react-native-image-picker（拍照／从相册获取图片）

首先给个github地址：https://github.com/react-community/react-native-image-picker 英文不行的看下面这个笔记

该插件可以同时给iOS和Android两个平台下使用,但是需要配置下各自平台下的文件

1. 首先,安装下该插件:

npm install react-native-image-picker@latest --save

2. 先别link,先添加进来该库之后再link.

下面对于各自平台进行配置即可.

iOS:

手动添加库：

In the XCode's "Project navigator", right click on your project's Libraries folder ➜ Add Files to <...>
Go to node_modules ➜ react-native-image-picker ➜ ios ➜ select RNImagePicker.xcodeproj

　=> 打开Xcode打开项目,点击根目录,右键选择　Add Files to 'XXX',选中项目中的该路径下的文件即可:node_modules ➜ react-native-image-picker ➜ ios ➜ select RNImagePicker.xcodeproj

OK,添加进来之后,再进行 link命令. react-native link react-native-image-picker

3.Add RNImagePicker.a to Build Phases -> Link Binary With Libraries

（注意这里的只要出现RNImagePicker.就可以了，跟前面的图标没关系）

4.For iOS 10+, Add the NSPhotoLibraryUsageDescription and NSCameraUsageDescription keys to your Info.plist with strings describing why your app needs these permissions

=>对于适配iOS10,需要在info.plist中配置NSPhotoLibraryUsageDescription和NSCameraUsageDescription

（点击加号选择privacy camera usage Description 和 privacy. PhotoLibraryUsageDescription ）

iOS平台配置完毕.

Android:

1.Add the following lines to android/settings.gradle:

include ':react-native-image-picker'
project(':react-native-image-picker').projectDir = new File(settingsDir, '../node_modules/react-native-image-picker/android')

2.Add the compile line to the dependencies in android/app/build.gradle:

dependencies {
    compile project(':react-native-image-picker')
}

3.Add the required permissions in AndroidManifest.xml:

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

4.Add the import and link the package in MainApplication.java:

import com.imagepicker.ImagePickerPackage;


.........



 new ImagePickerPackage()

OK,安卓这边也配置完毕.

用法:

配置弹出框信息

import  ImagePicker from 'react-native-image-picker'; //第三方相机
var photoOptions = {
    //底部弹出框选项
    title:'请选择',
    cancelButtonTitle:'取消',
    takePhotoButtonTitle:'拍照',
    chooseFromLibraryButtonTitle:'选择相册',
    quality:0.75,
    allowsEditing:true,
    noData:false,
    storageOptions: {
        skipBackup: true,
        path:'images'
    }
}

点击事件

cameraAction = () =>{
        
ImagePicker.showImagePicker(options, (response) => {
  console.log('Response = ', response);

  if (response.didCancel) {
    console.log('User cancelled image picker');
  }
  else if (response.error) {
    console.log('ImagePicker Error: ', response.error);
  }
  else if (response.customButton) {
    console.log('User tapped custom button: ', response.customButton);
  }
  else {
    let source = { uri: response.uri };

    // You can also display the image using data:
    // let source = { uri: 'data:image/jpeg;base64,' + response.data };

    this.setState({
      avatarSource: source
    });
  }
});
    }

<Image source={this.state.avatarSource} style={styles.uploadAvatar} />

这里注意的是 ios的模拟器不能拍照哦

案例: