uiimageview 保留滚动视图缩放位置
我有一个滚动视图，其中 uiimageview 表示为平铺层，它是一个静态地图。我有一个用于固定它的图像视图。当用户放大和缩小地图时，我需要图钉保留其位置，并按比例增加尺寸，以便在较小的缩放比例下仍然可见。我可以在谷歌地图中无缝地看到这一切的发生。当您缩小时，图钉的大小也会同时改变。 我尝试实现scrollviewdidbeginzoom和endzooming方法，当用户开始缩放时隐藏图钉并将其放回末尾重新计算的位置。但看起来并不优雅。任何指点都会有帮助，谢谢。
I have a scrollview with an uiimageview represented as a tiled layer, it is a static map. I have an imageview for pin over it. when the user zooms in and out of the map, I need the pin to retain its position, and also increase in size proportionately so that it is still visible at a smaller zoomscale. I can see this happening seamlessly in google maps. When you zoom out, the pin changes size at the same time.
I tried implementing the scrollviewdidbeginzoom and endzooming methods, hiding the pin when the user begins zoom and putting it back at a recalculated position at the end of it. But it does not appear elegant. Any pointers would be helpful, thanks.
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我通过将 imageview pin 添加到最内层（photoscroller 应用程序中的 TilingView）的整个逻辑解决了这个问题。然后它会自动保持位置。我更改图像的大小，使其在某些缩放级别下更大。
I solved this by taking the whole logic of adding the imageview pin to the innermost layer(TilingView in the photoscroller app). It then automatically takes care of retaining position. I change the size of the image to make it bigger at certain zoom levels.