int_time; Timer _timer; intget currentTime => _time; bool get isFinish => _time == timeMax; CountDownTimeModel(this.timeMax,this.interval) { _time = timeMax; } voidstartCountDown{ if(_timer !=null) { _timer.cancel; _timer =null; } _timer = Timer.periodic(Duration(seconds: int...
时间常用方法: ///获取当前时间_getCurrentTime(){varnow=DateTime.now();//打印当前时间 2020-12-29 06:21:34.729165print("当前时间: $now");}///将时间转换为时间戳_getTimestamp(){//时间varnow=DateTime.now();//时间戳 1644820150292vartime=now.millisecondsSinceEpoch;print("时间戳: $time");}/...
#How to get the Current Epoch Timestamp in Dart/Flutter Dart provides theDateTimeclass to provide Date and Time-related functions. Thenow()method returns the DateTime object current date and time. Here is an example to get the Current timestamp in Dart voidmain() {print(DateTime.now().mil...
例如,我们来看下 Flutter 官方提供的示例代码: consttimeout=constDuration(seconds:3);constms=constDuration(milliseconds:1);startTimeout([int milliseconds]){varduration=milliseconds==null?timeout:ms*milliseconds;returnnewTimer(duration,handleTimeout);}...voidhandleTimeout(){// callback function...} ...
DayPicker(selectableDayPredicate:(date){returndate.difference(DateTime.now()).inMilliseconds<0;},...) 效果如下: 今天以后的日期全部为灰色,不可选状态。 MonthPicker 可选择的月份选择器,在顶部有一个滚动的月份列表,每个月份下面展示当前月份的天,本质上MonthPicker是滚动的月份列表+ DayPicker,用法如下: ...
return date.difference(DateTime.now()).inMilliseconds < 0; }, ... ) 效果如下: 今天以后的日期全部为灰色,不可选状态。 MonthPicker 可选择的月份选择器,在顶部有一个滚动的月份列表,每个月份下面展示当前月份的天,本质上MonthPicker是滚动的月份列表+ DayPicker,用法如下: ...
duration: Duration(milliseconds: 800), ); progressController.animateTo(widget.progress); waveController.repeat(); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. waveController是无限循环的动画,营造水波纹一直涌动的效果。 progressController则是控制水波纹上升的动画效果。
_currentTime.millisecondsSinceEpoch); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 当子树 (subtree) 中存在有状态 (stateful) 的 widget 时,修改子树时才需要 key 来维护 widget 状态。如果整个 widget subtree 中都是无状态 (stateless) 的 widgets,key 是不需要的。
Current isolate:driver.execute('flutter:getIsolate')(JS) Particular isolate:driver.execute('flutter:getIsolate', 'isolates/2978358234363215')(JS) Commands across contexts These Appium commands can work across context deleteSession setContext getCurrentContext ...
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