带有coreplot图的子视图的UIScrollView不经常缩放

Question

我有一个带有核心图图视图的子视图的滚动视图。它不经常变焦。如果我们在滚动视图后缩放滚动视图，它将会变焦。

每次委托方法 - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView将被调用，但调用委托方法的机会 - (void)scrollViewDidZoom:(UIScrollView *)scrollView非常少。

这种行为的原因是什么？

[consumptionGraphView_ addSubview:graphPlottedView_]; 
[graphPlottedView_ setContentScaleFactor:consumptionGraphView_.contentScaleFactor]; 

consumptionGraphView_.contentSize = consumptionGraphView_.frame.size; 
consumptionGraphView_.minimumZoomScale = 1.0; 
consumptionGraphView_.maximumZoomScale = 10.0; 
consumptionGraphView_.zoomScale = 0.1; 

Answer 1

问题出在CorePlot的GraphHostingView中存在UIGestureRecognizers。

 for (UIGestureRecognizer * recognizer in hostingView.gestureRecognizers) { 
     [hostingView removeGestureRecognizer:recognizer]; 
    } 

此代码将删除UIGestureRecognizers，并且图形缩放是完美的。