帶有coreplot圖的子視圖的UIScrollView不經常縮放

Question

我有一個帶有核心圖圖視圖的子視圖的滾動視圖。它不經常變焦。如果我們在滾動視圖後縮放滾動視圖，它將會變焦。

每次委託方法 - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView將被調用，但調用委託方法的機會 - (void)scrollViewDidZoom:(UIScrollView *)scrollView非常少。

這種行爲的原因是什麼？

[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

問題出在CorePlot的GraphHostingView中存在UIGestureRecognizers。

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

此代碼將刪除UIGestureRecognizers，並且圖形縮放是完美的。