带有 coreplot 图形子视图的 UIScrollView 不经常缩放
我有一个带有核心图图形视图子视图的滚动视图。它不经常缩放。如果我们在滚动视图后缩放滚动视图，它将获得缩放。
每次都会调用委托方法 - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView ，但有机会调用委托方法 - (void)scrollViewDidZoom:(UIScrollView *)scrollView< /code> 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;
I have a scrollview with sub-view of core-plot graph view. It does not zoom frequently. If we are zooming the scrollview after scrolling the view, it will get zoom.
Every time the delegate method - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView will get called, but chance of calling the delegate method - (void)scrollViewDidZoom:(UIScrollView *)scrollView is very less.
What is the reason for this behaviour?
[consumptionGraphView_ addSubview:graphPlottedView_];
[graphPlottedView_ setContentScaleFactor:consumptionGraphView_.contentScaleFactor];
consumptionGraphView_.contentSize = consumptionGraphView_.frame.size;
consumptionGraphView_.minimumZoomScale = 1.0;
consumptionGraphView_.maximumZoomScale = 10.0;
consumptionGraphView_.zoomScale = 0.1;
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该问题是由于 CorePlot 的 GraphHostingView 中存在 UIGestureRecognizers 造成的。
for (UIGestureRecognizer * recognizer in hostingView.gestureRecognizers) { [hostingView removeGestureRecognizer:recognizer]; }此代码将删除 UIGestureRecognizers，并且图形缩放现在是完美的。
The problem was due to the presence of UIGestureRecognizers in GraphHostingView of CorePlot.
for (UIGestureRecognizer * recognizer in hostingView.gestureRecognizers) { [hostingView removeGestureRecognizer:recognizer]; }This code will remove the UIGestureRecognizers and the graph zooming is perfect now.