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Add velocity and targetContentOffset for scrollEndDrag event in RCTScrollView 

Summary:
In some case, it is very useful to have `velocity` and `targetContentOffset` parameters for `ScrollEndDrag` event. I just added them.
Closes https://github.com/facebook/react-native/pull/1500
Github Author: =?UTF-8?q?=E6=AD=A3=E9=9C=96?= <zhenglin.lzl@alibaba-inc.com>

Test Plan: Imported from GitHub, without a `Test Plan:` line.
This commit is contained in:
=?UTF-8?q?=E6=AD=A3=E9=9C=96?= 2015-06-15 12:16:07 -07:00
parent df8287d8ee
commit 3940b024a0
1 changed files with 11 additions and 1 deletions
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12
React/Views/RCTScrollView.m
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@ -581,7 +581,17 @@ RCT_SCROLL_EVENT_HANDLER(scrollViewDidZoom, RCTScrollEventTypeMove)
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
{
[_eventDispatcher sendScrollEventWithType:RCTScrollEventTypeEnd reactTag:self.reactTag scrollView:scrollView userData:nil];
NSDictionary *userData = @{
@"velocity": @{
@"x": @(velocity.x),
@"y": @(velocity.y)
},
@"targetContentOffset": @{
@"x": @(targetContentOffset->x),
@"y": @(targetContentOffset->y)
}
};
[_eventDispatcher sendScrollEventWithType:RCTScrollEventTypeEnd reactTag:self.reactTag scrollView:scrollView userData:userData];
RCT_FORWARD_SCROLL_EVENT(scrollViewWillEndDragging:scrollView withVelocity:velocity targetContentOffset:targetContentOffset);
}