Cocoa Scroll view keeps bouncing on mavericks in the middle of the file

问题

Does anybody know why when scrolling (via two finger touch) rapidly up and down it "catches" quite often and bounces incorrectly in the middle of a scrollview? This behavior is quite annoying and makes for a bad user experience.

Xcode has scrollviews which bounce both horizontally and vertically and doesn't nearly-as-often get stuck this way.

回答1:

That seems like a bug in NSScrollView.

You can enable predominant axis scrolling, which mostly eliminates the problem:

scrollView.usesPredominantAxisScrolling = YES;

Or, you can disable horizontal bouncing, which is what Finder does:

scrollView.horizontalScrollElasticity = NSScrollElasticityNone;

来源：https://stackoverflow.com/questions/21339616/cocoa-scroll-view-keeps-bouncing-on-mavericks-in-the-middle-of-the-file