I’ve mentioned a number of custom components enhancing UIScrollView, such as ReorderableGridView for drag and drop reorderable views, and Refresher which makes it easy to add pull-to-refresh to a UIScrollView with custom animations.
Here’s an open source component that enhances UIScrollView with a number of added features called SMScrollView from Simon Hanukaev.
Specifically SMScrollView makes it easy to add centered zooming to a scroll view, double tap to zoom in and out, and scale to Fit for orientantion changes. An example project is included.
You can find SMScrollView on Github here.
A nice UIScrollView enhancement adding some commonly desired features.
Original article: Open Source Component For Adding Zoom Capabilities And More To A UIScrollView
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