TableView有一个属性scrollView
,该属性将返回TableView的内部scrollView。使用以下...
tableview.scrollView.decelerationRate = UIScrollViewDecelerationRateFast;
其他方式:
TableView将响应scrollView委托,因此我们需要实现scrollView的委托,如下所示:
采用这些全局变量:
CGPoint lastOffset;
NSTimeInterval lastOffsetCapture;
BOOL isScrollingFast;
实施scrollViewDidScroll
like :
- (void) scrollViewDidScroll:(UIScrollView *)scrollView {
CGPoint currentOffset = scrollView.contentOffset;
NSTimeInterval currentTime = [NSDate timeIntervalSinceReferenceDate];
NSTimeInterval timeDiff = currentTime - lastOffsetCapture;
if(timeDiff > 0.1) {
CGFloat distance = currentOffset.y - lastOffset.y;
//The multiply by 10, / 1000 isn't really necessary.......
CGFloat scrollSpeedNotAbs = (distance * 10) / 1000; //in pixels per millisecond
CGFloat scrollSpeed = fabsf(scrollSpeedNotAbs);
if (scrollSpeed > 0.5) {
isScrollingFast = YES;
NSLog(@"Fast");
} else {
isScrollingFast = NO;
NSLog(@"Slow");
}
lastOffset = currentOffset;
lastOffsetCapture = currentTime;
}
}
然后实施scrollViewDidEndDragging
像这样 :
- (void) scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
if( !decelerate )
{
NSUInteger currentIndex = (NSUInteger)(scrollView.contentOffset.x / scrollView.bounds.size.width);
[scrollView setContentOffset:CGPointMake(scrollView.bounds.size.width * currentIndex, 0) animated:YES];
}
}
希望这可以帮助你...