Want to add a custom drop-down refresh starting position

[pepenb]

First of all, thank shakurocom for providing this pull-down refresh library, which saved me a lot of time. I found in the process of using this pull-down refresh animation starts from the middle of a fixed height. Can you support the pull-down refresh change in a customized direction? For example, from the bottom up instead of the middle, I did not find it in the document Can change the starting position of the drop-down refresh