preMonthCalendar method

void preMonthCalendar(
  1. String dateStr,
  2. void completionBlk(
    1. Map?
    )
)

切换到上个月

Implementation

void preMonthCalendar(String dateStr, void Function(Map?) completionBlk) {
  String preMonthStr = titleOfPreMonth(dateStr);
  turnCalendarMapWithCallBack(preMonthStr, completionBlk);
}