[Add] 支持记录当前选中的图片数组

README.md

@@ -19,7 +19,9 @@
 * 支持单选、多选，类型包括图片、GIF
 * 可自定义裁剪区域大小，支持圆形裁剪
 * 可设置压缩质量
-* 支持返回图片 base64 编码
+* 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
 
 ## 运行截图
 
@@ -214,6 +216,19 @@ handleSelectPhoto = async () => {
   }
 }
 ```
+### 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：
+```javascript
+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 });
+}
+```
+
 ### 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。
 

android/src/main/java/com/reactlibrary/RNSyanImagePickerModule.java

@@ -88,6 +88,17 @@ public class RNSyanImagePickerModule extends ReactContextBaseJavaModule {
         PictureFileUtils.deleteCacheDirFile(currentActivity);
     }
 
+    /**
+     * 移除选中的图片
+     * @param {int} index 要移除的图片下标
+     */
+    @ReactMethod
+    public void removePhotoAtIndex(int index) {
+        if (selectList != null && selectList.size() > index) {
+            selectList.remove(index);
+        }
+    }
+
     /**
      * 打开相册选择
      */
@@ -139,6 +150,7 @@ public class RNSyanImagePickerModule extends ReactContextBaseJavaModule {
                 .synOrAsy(true)//同步true或异步false 压缩 默认同步
                 .rotateEnabled(true) // 裁剪是否可旋转图片 true or false
                 .scaleEnabled(true)// 裁剪是否可放大缩小图片 true or false
+                .selectionMedia(selectList) // 当前已选中的图片 List
                 //.videoQuality(0)// 视频录制质量 0 or 1 int
                 //.videoMaxSecond(15)// 显示多少秒以内的视频or音频也可适用 int
                 //.videoMinSecond(10)// 显示多少秒以内的视频or音频也可适用 int
@@ -185,11 +197,15 @@ public class RNSyanImagePickerModule extends ReactContextBaseJavaModule {
         public void onActivityResult(Activity activity, int requestCode, int resultCode, Intent data) {
             switch (requestCode) {
                 case PictureConfig.CHOOSE_REQUEST:
-                    selectList = PictureSelector.obtainMultipleResult(data);
+                    List<LocalMedia> tmpSelectList = PictureSelector.obtainMultipleResult(data);
+                    if (!tmpSelectList.isEmpty()) {
+                        selectList = tmpSelectList;
+                    }
+
                     WritableArray imageList = new WritableNativeArray();
                     boolean enableBase64 = cameraOptions.getBoolean("enableBase64");
 
-                    for (LocalMedia media : selectList) {
+                    for (LocalMedia media : tmpSelectList) {
                         WritableMap aImage = new WritableNativeMap();
 
                         BitmapFactory.Options options = new BitmapFactory.Options();
@@ -238,7 +254,7 @@ public class RNSyanImagePickerModule extends ReactContextBaseJavaModule {
 
                         imageList.pushMap(aImage);
                     }
-                    if (selectList.isEmpty()) {
+                    if (tmpSelectList.isEmpty()) {
                         invokeError();
                     } else {
                         invokeSuccessWithResult(imageList);
@@ -259,7 +275,7 @@ public class RNSyanImagePickerModule extends ReactContextBaseJavaModule {
 
         byte[] encode = Base64.encode(bytes,Base64.DEFAULT);
         String encodeString = new String(encode);
-        return encodeString;
+        return "data:image/jpeg;base64," + encodeString;
     }
 
     /**

index.js

@@ -103,5 +103,13 @@ export default {
      */
     deleteCache() {
         RNSyanImagePicker.deleteCache()
+    },
+
+    /**
+     * 移除选中的图片
+     * @param {Number} index 要移除的图片下标
+     */
+    removePhotoAtIndex(index) {
+        RNSyanImagePicker.removePhotoAtIndex(index)
     }
 };

ios/RNSyanImagePicker.m

@@ -22,10 +22,26 @@
  保存回调的callback
  */
 @property (nonatomic, copy) RCTResponseSenderBlock callback;
+/**
+ 保存选中的图片数组
+ */
+@property (nonatomic, strong) NSMutableArray *selectedAssets;
 @end
 
 @implementation RNSyanImagePicker
 
+- (instancetype)init {
+		self = [super init];
+		if (self) {
+			_selectedAssets = [NSMutableArray array];
+		}
+		return self;
+}
+
+- (void)dealloc {
+		_selectedAssets = nil;
+}
+
 RCT_EXPORT_MODULE()
 
 RCT_EXPORT_METHOD(showImagePicker:(NSDictionary *)options
@@ -61,6 +77,12 @@ RCT_EXPORT_METHOD(deleteCache) {
     [fileManager removeItemAtPath: [NSString stringWithFormat:@"%@ImageCaches", NSTemporaryDirectory()] error:nil];
 }
 
+RCT_EXPORT_METHOD(removePhotoAtIndex:(NSInteger)index) {
+		if (self.selectedAssets && self.selectedAssets.count > index) {
+				[self.selectedAssets removeObjectAtIndex:index];
+		}
+}
+
 - (void)openImagePicker {
     // 照片最大可选张数
     NSInteger imageCount = [self.cameraOptions sy_integerForKey:@"imageCount"];
@@ -82,6 +104,7 @@ RCT_EXPORT_METHOD(deleteCache) {
     imagePickerVc.allowPickingVideo = NO; // 不允许视频
     imagePickerVc.allowPickingOriginalPhoto = NO; // 允许原图
     imagePickerVc.allowCrop = isCrop;   // 裁剪
+		imagePickerVc.selectedAssets = self.selectedAssets; // 当前已选中的图片
 
     if (imageCount == 1) {
         // 单选模式
@@ -102,6 +125,7 @@ RCT_EXPORT_METHOD(deleteCache) {
 
     __block TZImagePickerController *weakPicker = imagePickerVc;
     [imagePickerVc setDidFinishPickingPhotosWithInfosHandle:^(NSArray<UIImage *> *photos,NSArray *assets,BOOL isSelectOriginalPhoto,NSArray<NSDictionary *> *infos) {
+					self.selectedAssets = [NSMutableArray arrayWithArray:assets];
           NSMutableArray *selectedPhotos = [NSMutableArray array];
           [weakPicker showProgressHUD];
           if (imageCount == 1 && isCrop) {