///日期转时间戳staticintdateToTimestamp(String date,{isMicroseconds=false}){DateTime dateTime=DateTime.parse(date);int timestamp=dateTime.millisecondsSinceEpoch;if(isMicroseconds){timestamp=dateTime.microsecondsSinceEpoch;}returntimestamp;} 时间戳转时间格式 staticDateTimetimestampToDate(int timestamp){Dat...
DateTime date=DateTime(2020,9,5);//或者当前时间DateTime.now();//下个月的第一天DateTime lastDateTime=DateTime(date.year,date.month+1);//再减一天DateTime lastDay=lastDateTime.subtract(Duration(days:1));print(lastDay);//2020-09-30 00:00:00.000 二、String-int-double类型转换 //String -> do...
// String 转为 int var one = int.parse('1'); assert(one == 1); // String 转为 double var onePointOne = double.parse('1.1'); assert(onePointOne == 1.1); // int 转为 String String oneAsString = 1.toString(); assert(oneAsString == '1'); // double 转为 String String pi...
复制 // 初始化当前日期DateTime _nowDate=DateTime.now();// 获取当前时间print(_nowDate);// 2021-01-01 18:18:37.522021// 获取当前时间戳print(_nowDate.millisecondsSinceEpoch);// 1609496743946// 将时间戳转为格式化的时间print(DateTime.fromMillisecondsSinceEpoch(1609496743946));// 2021-01-01 18:25...
类型转换 Number转String 用 12.toString() String转Number用 int.parse(str) 6. var num = 0/0 此时num类型是NaN if(num is NaN) { …… } List的常用方法和属性:注意调用reversed将返回('a','b'), 需要toList(),才能转为List 即就是['a', 'b']. Map常用属性和方法:...
DateTime _nowDate= DateTime.now();//当前日期TimeOfDay _nowTime = TimeOfDay.now();//当前时间//调起日期选择器_showDatePicker(){//获取异步方法里面的值的第一种方式:thenshowDatePicker(//如下四个参数为必填参数context: context, initialDate: _nowDate,//选中的日期firstDate: DateTime(1900),//日期选...
int endTime = DateTime.now().millisecondsSinceEpoch; result = sum/count; cost = endTime - startTime; setState(() {}); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 可以看到,这样是可以实现需求的,总耗时在8.5秒左右。细心的朋友可能会发现,在点击按键触发_doTask时,FloatingActionButton的...
List<DateTime> getHighlightedDates() { return List<DateTime>.generate(10, (int index) => DateTime.now().add(Duration(days: 10 * (index + 1))), ); } int maxSelectYear() { return DateTime.now().year; } int maxSelectMounth() { ...
DateTime minValue, DateTime value, DateTimePickerAdapter adapter, @required _DateClickCallBack clickCallback, }) {inttimeType;if(dateType == DateType.YM){ timeType = PickerDateTimeType.kYM; }elseif(dateType == DateType.YMD_HM){ timeType = PickerDateTimeType.kYMDHM; ...
int count=0;constperiod=constDuration(seconds:1);print('currentTime='+DateTime.now().toString());Timer.periodic(period,(timer){//到时回调 print('afterTimer='+DateTime.now().toString()); count++; if (count >= 5) { //取消定时器,避免无限回调 timer.cancel(); timer = null; }}); ...