Objective-C将MKOverlay添加到地图视图中的动画淡入 [英] Objective-C add MKOverlay to map view animated fade in
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问题描述
我一直在尝试向带有动画的地图添加MKOverlay.我正在尝试使其在添加时淡入并在删除时淡出.是否可以通过创建自定义叠加层类或叠加层视图类来完成此操作?
I've been trying to add an MKOverlay to a map with animation. I'm trying to make it fade in when it's added and fade out when it's removed. Could this be done by created a custom overlay class or overlay view class?
推荐答案
在iOS 7上，即使使用新的MKOverlayRenderer，也可以实现此目的.它具有alpha 属性您可以通过设置计时器以重复更改其值并调用setNeedsDisplayInMapRect:zoomScale:来制作动画.
On iOS 7 you could achieve this even with the new MKOverlayRenderer. It has an alpha property which you could animate by setting up a timer to repeatedly change its value and call setNeedsDisplayInMapRect:zoomScale:.
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