<itemvalue="Cancels this subscription. After this call, the subscription no longer receives events. The stream may need to shut down the source of events and clean up after the subscription is canceled. Returns a future that is completed once the stream has finished its cleanup. Typically, cleanup happens when the stream needs to release resources. For example, a stream might need to close an open file (as an asynchronous operation). If the listener wants to delete the file after having canceled the subscription, it must wait for the cleanup future to complete. If the cleanup throws, which it really shouldn't, the returned future completes with that error."/>
<itemvalue="cancel"/>
<itemvalue="reactive"/>
<itemvalue="subscription"/>
<itemvalue="Missing or insufficient permissions"/>
<itemvalue="Notifies of document updates at this location. An initial event is immediately sent, and further events will be sent whenever the document is modified."/>
<itemvalue="Pop the top-most route off the navigator. {@macro flutter.widgets.navigator.pop} {@tool snippet} Typical usage for closing a route is as follows: ```dart void _handleClose() { navigator.pop(); } ``` {@end-tool} {@tool snippet} A dialog box might be closed with a result: ```dart void _handleAccept() { navigator.pop(true); dialog returns true } ``` {@end-tool} @optionalTypeArgs"/>
<itemvalue="Whether the navigator can be popped. {@macro flutter.widgets.navigator.canPop} See also: [Route.isFirst], which returns true for routes for which [canPop] returns false."/>
<itemvalue="Consults the current route's [Route.willPop] method, and acts accordingly, potentially popping the route as a result; returns whether the pop request should be considered handled. {@macro flutter.widgets.navigator.maybePop} See also: [Form], which provides an `onWillPop` callback that enables the form to veto a [pop] initiated by the app's back button. [ModalRoute], which provides a `scopedWillPopCallback` that can be used to define the route's `willPop` method."/>
<itemvalue="forget about this pop, we were disposed in the meantime"/>
<itemvalue="Cancels this subscription. After this call, the subscription no longer receives events. The stream may need to shut down the source of events and clean up after the subscription is canceled. Returns a future that is completed once the stream has finished its cleanup. Typically, cleanup happens when the stream needs to release resources. For example, a stream might need to close an open file (as an asynchronous operation). If the listener wants to delete the file after having canceled the subscription, it must wait for the cleanup future to complete. If the cleanup throws, which it really shouldn't, the returned future completes with that error."/>
<itemvalue="moment Click Notification Icon"/>
<itemvalue="Opacity Button"/>
<itemvalue="操产品经理"/>
@ -51,14 +54,11 @@
<itemvalue="diameter Ratio"/>
<itemvalue="Convert the given point from the local coordinate system for this box to the global coordinate system in logical pixels. If `ancestor` is non-null, this function converts the given point to the coordinate system of `ancestor` (which must be an ancestor of this render object) instead of to the global coordinate system. This method is implemented in terms of [getTransformTo]. If the transform matrix puts the given `point` on the line at infinity (for instance, when the transform matrix is the zero matrix), this method returns (NaN, NaN)."/>
<itemvalue="Vertical viewport was given unbounded height. Viewports expand in the scrolling direction to fill their container. In this case, a vertical viewport was given an unlimited amount of vertical space in which to expand. This situation typically happens when a scrollable widget is nested inside another scrollable widget. If this widget is always nested in a scrollable widget there is no need to use a viewport because there will always be enough vertical space for the children. In this case, consider using a Column instead. Otherwise, consider using the "shrinkWrap" property (or a ShrinkWrappingViewport) to size the height of the viewport to the sum of the heights of its children."/>
<itemvalue="The following assertion was thrown during performResize(): Vertical viewport was given unbounded height. Viewports expand in the scrolling direction to fill their container. In this case, a vertical viewport was given an unlimited amount of vertical space in which to expand. This situation typically happens when a scrollable widget is nested inside another scrollable widget."/>