MKMapKit实用最大MKPolylines数量
是否有任何已发布的基准测试，或者您是否有任何关于可以在 iPhone 和 iPad 上以合理性能添加到地图中的 MKPolylines 的指示？
我想添加数千个。
我的最高限额是多少？
Is there any published benchmarks or do you have any indication about how many MKPolylines you can add to a map with reasonable performance on iPhone and iPad?
I would like to add thousands of them.
What would be my top limit?
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我不知道 MKPolylines，但我尝试渲染 1200 个 MKPolygon，并且成功渲染它而没有崩溃。但它表现出一些较慢的性能。我认为没有限制。我的建议是一切都值得尝试。
I dont know about MKPolylines but i have tried rendering 1200 MKPolygons and i successfully rendered it without crashing. But it showed be some slower performance. I dont think there is a limit for it. What i would suggest is everything is worth a try.
我的应用程序（Circle 8）有大约 70 条 MKPolylines，它们在地图中都有自己单独的 MKOverlayView。性能/平移非常慢，内存警告来得又快又猛。我最终将所有这些包装到一个视图（MKOverlayPathView 的子类）中，该视图使用简单的 CGPath 调用绘制每个 MKPolyline。性能/平移/内存问题已解决。公平地说，这并不是我的原创想法，而是主要来自此处相关的 Apple 开发者论坛线程：
https://devforums.apple.com/message/328631#328631
My app (Circle 8) has about 70 MKPolylines that all had their own separate MKOverlayView in the map. Performance/panning was horribly slow and the memory warnings came in fast and furious. I ended up wrapping all these into a single view (subclass of MKOverlayPathView) that draws each MKPolyline using simple CGPath calls. Performance/panning/memory problems SOLVED. To be fair, this was not an original thought on my part but rather came largely from the related Apple Developer Forum thread here:
https://devforums.apple.com/message/328631#328631