添加一个空判断FLTImagePickerMetaDataUtil.m

ios/Classes/FLTImagePickerMetaDataUtil.m

@@ -51,6 +51,9 @@ const FLTImagePickerMIMEType kFLTImagePickerMIMETypeDefault = FLTImagePickerMIME
 
 + (NSData *)updateMetaData:(NSDictionary *)metaData toImage:(NSData *)imageData {
   NSMutableData *mutableData = [NSMutableData data];
+  if(imageData == nil){
+      return mutableData;
+  }
   CGImageSourceRef cgImage = CGImageSourceCreateWithData((__bridge CFDataRef)imageData, NULL);
   CGImageDestinationRef destination = CGImageDestinationCreateWithData(
       (__bridge CFMutableDataRef)mutableData, CGImageSourceGetType(cgImage), 1, nil);