追踪朋友的位置
我想让用户能够通过我的应用程序之一跟踪他们的朋友。该应用程序适用于音乐节。
我一直在想办法做到这一点：
- 让用户为设备设置一个昵称（与UDID关联），让用户通过昵称将彼此添加到“好友列表”中。当应用程序运行时，用户的位置将通过推送消息发送。这可能有点难以集成 - 而且我有点讨厌使用推送通知。
- 为每个用户设置帐户，然后将用户的最近位置存储在数据库中并读取它们。同样，用户将通过昵称相互添加。这将是一个非常简单的解决方案，但我不确定存储用户的位置是否合法（也许我可以请求他们的许可，并且默认情况下不启用此选项？）
- 我见过一个应用程序这样做“朋友”跟踪”并通过让用户登录 Facebook 来完成此操作。我没有尝试过这个功能，也不知道 Facebook 是如何做到这一点的。也许你知道？
对这些解决方案有什么想法或者有其他方法可以实现这一目标吗？
I would like to make it possible for the user to track their friends through one of my applications. The application is for a music festival.
I have been thinking of ways to do this:
- Let the user set a nickname for the device (associated with the UDID) and let users add each other to a "friend list" by their nickname. When the application is running the location of the users would be sent around through push messages. This might be a bit hard to integrate - and I kind of hate working with push notifications.
- Set up accounts for each user then store the user's most recent location in a database and read them. Again, users will add each other by nicknames. This would be a really easy solution but I am not sure if it is legal to store the location of the user (maybe I could ask them for permission and not have this option enabled by default?)
- I have seen an application doing this "friend tracking" and doing it by having the user log into Facebook. I did not try this feature and I do not know how they do it with Facebook. Maybe you do?
Any thoughts on these solutions or are there any other ways to accomplish this?
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你见过谷歌纬度吗？
http://nexos.ravex.net.au/apps/xnetViewer/ ?q=google+latitude
有 api
http://code.google.com/apis/latitude/
Have you seen google latitude?
http://nexos.ravex.net.au/apps/xnetViewer/?q=google+latitude
Has api
http://code.google.com/apis/latitude/