在正则表达式中使用\B：
justinmcadded thewaiting for customer responseThe Flutter team cannot make further progress on this issue until the original reporter respondslabelMar 31, 2020 Thats a good example, I have just tested the same blacklisting input formatter on my android phone that i used in December and it seems...
not designed to handle regexes that match an entire string (such as the example seen in). The reverted commit will cause unexpected moves of the cursor position in text fields that expect the old behavior. This can be seen in the phone number field of the text fields demo in Flutter ...