I use touchkit to develope mobile UI, but I can not find multiple uploader files component.
It just can use single file uploader.
Does Touchkit has multiple uploader files ?
No, there is no multi file upload support in Upload component in Touchkit, the detailed documentation is here_
https://vaadin.com/docs/v7/touchkit/mobile-features.html#mobile.features.upload
The reason is that it is direct derivative from Framework standard Upload, which also single file case.
There are number of add-ons for multi file upload, but I do not know how well they work with TouchKit (and actually also FW8 file drag’n’drop has that feature, but not applicable for mobile)