do you have some strategy for manage over 10000 annotations on a small area inside a MapKit view... I have set a filter for manage that when the开发者_运维技巧 user change the zoom level but with over 10000 iterations it's very slow....
Thanks
What is usually done is merge several annotations that are close to each other into only one and show them in more detail once the user zooms in. Would that work for you?
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是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
微信重新建群怎么开发者_Go百科建？ 产品名称：苹果手机 产品型号：iPhone 11 系统版本：iOS 13
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