ConversionFlutter - 回调导出路径优化

ios/Runner/ConvertUtil.swift

@@ -188,7 +188,7 @@ class ConvertUtil : NSObject,CPDFConverterDelegate{
      
      @objc func converter(_ converter: CPDFConverter!, pageIndex index: UInt, pageCount count: UInt) {
          let progress = Double(index) / Double(count)
-         result?(Int(progress*100), converting, nil)
+         result?(Int(progress*100), converting, mPath)
      }
      
      @objc func converter(_ converter: CPDFConverter!, didEndConvert error: Error!) {