动画的MKOverlayView [英] Animating an MKOverlayView

问题描述

我有一个显示动画的雷达数据作为一系列图像的MKOverlayView。我的问题是，该雷达图像被切碎成MapKit砖。要切换图像我有一个调用它设置在我的叠加当前图像的更新功能，然后调用一个计时器以下

I have an MKOverlayView that displays animated radar data as a series of images. The issue I have is that the radar images are chopped into tiles by MapKit. To swap images I have a timer that calls an update function which sets the current image in my overlay and then calls the following

[myRadarOverlayView setNeedsDisplayInMapRect:self.mapView.visibleMapRect];

该覆盖更新，但这样做一次一个瓦，所以我得到一个波涛汹涌的动画。如何使所有的瓷砖在精确的同时动画（即交换图像）任何想法？

The overlay updates, but does so one tile at a time so I get a choppy animation. Any ideas about how make all the tiles animate (i.e. swap images) at the exact same time?

推荐答案

我加入一个UIImageView作为MKOverlayView的子视图解决了这个。

I solved this by adding a UIImageView as a subview of the MKOverlayView.

• 要动画，停止与绘图
  正常
  drawMa preCT：zoomScale：inContext的：（通过
  实例变量/属性标志）和
  画到的UIImageView，而不是（以
  所述animationImages属性），则
  使用startAnimating。

• To animate, stop drawing with the normal drawMapRect:zoomScale:inContext: (via an instance variable/property flag) and draw to the UIImageView instead (to the animationImages property), then use startAnimating.

您可以处理平移和缩放通过
重新初始化中的UIImageView
响应
图形页面：regionDidChangeAnimated：

You can handle panning and zooming by reinitializing the UIImageView in response to mapView:regionDidChangeAnimated:.

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