weex-image-crop-picker 扩展图片选择器，支持对相册与相机的图片进行压缩裁剪以及相册多选或视频选择等

weex-image-crop-picker

因为weex market里的 weex-image-picker插件并没有裁剪和多选功能，看到也是从 react-native-image-picker移植来的，而且该插件原做者推荐了功能比较多的 react-native-image-crop-picker ，因而产生了此项目。

Android

• root目录的build.gradle增长jitpack的地址

  allprojects {
    repositories {
      ...
      maven { url 'https://jitpack.io' }
    }
  }

• 在你的app目录的build.gradle增长一行依赖

  dependencies {
    compile com.github.voids:weex-image-crop-picker:1.0.2
  }
  // 若是提示duplicate entry，则exclude不须要的module，以下
  dependencies {
      compile('com.github.voids:weex-image-crop-picker:1.0.2') {
          exclude module: 'weex_sdk'
      }
  }

• Application子类中注册module

  import cn.dv4.weeximagecroppicker.ImageCropPickerModule;
  // 在WXSDKEngine.initialize以后注册module
  WXSDKEngine.registerModule("imageCropPicker", ImageCropPickerModule.class);

• 在你的WXSDKInstance所在的Activity中重载onActivityResult，不然接收不到返回结果

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      super.onActivityResult(requestCode, resultCode, data);
          if (mWXSDKInstance != null) {
          mWXSDKInstance.onActivityResult(requestCode, resultCode, data);
      }
  }

• 若是须要使用camera，则须要手动在AndroidManifest.xml中添加一行权限

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

iOS

• 在Podfile增长一行依赖

  pod 'WeexImageCropPicker'

• 更新依赖

  pod install

• appdelegate中注册module

  #import <WeexImageCropPicker/ImageCropPicker.h>
  // 在[WXSDKEngine initSDKEnvironment] 以后注册module
  [WXSDKEngine registerModule:@"imageCropPicker" withClass:[ImageCropPicker class]];

• 请在info.plist中自行添加权限

javascript

因为weex的扩展为callback，不支持promise，因此用法有些调整。

// example
var ImageCropPicker = weex.requireModule('imageCropPicker')
var options = {
    width: 300,
    height: 300,
    includeExif: true,
    mediaType: 'photo',
    cropping: true
}

export default {
    data: {
        result:""
    },
    methods: {
        gallery(e) {
            ImageCropPicker.openPicker(options, (response) => {
                // 成功返回 {code:'E_SUCCESS', data:{...}}
                this.result = JSON.stringify(response)
            })
        },
        camera(e) {
            ImageCropPicker.openCamera(options, (response) => {
                // 失败返回 {code:'E_PERMISSION_MISSING', message:'...'}
                this.result = JSON.stringify(response)
            })
        }
    }
}

options

Property	Type	Description
cropping	bool (default false)	是否开启图片剪裁
width	number	剪裁后图片的宽度，cropping为true时有效
height	number	剪裁后图片的高度，cropping 为true时有效
multiple	bool (default false)	是否开启多选，开启多选后裁剪功能无效
writeTempFile (ios only)	bool (default true)	When set to false, does not write temporary files for the selected images. This is useful to improve performance when you are retrieving file contents with the includeBase64 option and don't need to read files from disk.
includeBase64	bool (default false)	是否输出base64
includeExif	bool (default false)	是否输出图片exif信息，如gps、光圈、快门速度等
cropperActiveWidgetColor (android only)	string (default "#424242")	When cropping image, determines ActiveWidget color.
cropperStatusBarColor (android only)	string (default #424242)	When cropping image, determines the color of StatusBar.
cropperToolbarColor (android only)	string (default #424242)	When cropping image, determines the color of Toolbar.
freeStyleCropEnabled (android only)	bool (default false)	Enables user to apply custom rectangle area for cropping
cropperToolbarTitle	string (default Edit Photo)	When cropping image, determines the title of Toolbar.
cropperCircleOverlay	bool (default false)	是否裁剪时开启遮罩
minFiles (ios only)	number (default 1)	Min number of files to select when using multiple option
maxFiles (ios only)	number (default 5)	Max number of files to select when using multiple option
waitAnimationEnd (ios only)	bool (default true)	Promise will resolve/reject once ViewController completion block is called
smartAlbums (ios only)	array (supported values: ['PhotoStream', 'Generic', 'Panoramas', 'Videos', 'Favorites', 'Timelapses', 'AllHidden', 'RecentlyAdded', 'Bursts', 'SlomoVideos', 'UserLibrary', 'SelfPortraits', 'Screenshots', 'DepthEffect', 'LivePhotos', 'Animated', 'LongExposure']) (default ['UserLibrary', 'PhotoStream', 'Panoramas', 'Videos', 'Bursts'])	List of smart albums to choose from
useFrontCamera (ios only)	bool (default false)	Whether to default to the front/'selfie' camera when opened
compressVideoPreset (ios only)	string (default MediumQuality)	Choose which preset will be used for video compression
compressImageMaxWidth	number (default none)	图片压缩指定最大宽度
compressImageMaxHeight	number (default none)	图片压缩指定最大高度
compressImageQuality	number (default 1)	图片压缩质量 (取值范围 0 — 1，1为最好质量)
loadingLabelText (ios only)	string (default "Processing assets...")	Text displayed while photo is loading in picker
mediaType	string (default any)	媒体选择类型: 'photo'=照片, 'video'=视频, 'any'=所有
showsSelectedCount (ios only)	bool (default true)	Whether to show the number of selected assets
showCropGuidelines (android only)	bool (default true)	Whether to show the 3x3 grid on top of the image during cropping
hideBottomControls (android only)	bool (default false)	Whether to display bottom controls
enableRotationGesture (android only)	bool (default false)	Whether to enable rotating the image by hand gesture

参数均与 react-native-image-crop-picker 文档中所列的参数保持一致

注：跟原插件的android部份同样，并未实现视频压缩，由于ffmpeg太慢而且须要licence