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How to save the value of indexpath.row

开发者 https://www.devze.com 2023-01-14 18:16 出处:网络
I have a problem in my code. I have an application TabBar controller, with 2 tabs. The first tab is a map, and the second a list of cities(table view).

I have a problem in my code. I have an application TabBar controller, with 2 tabs. The first tab is a map, and the second a list of cities(table view). When I click in a city, the application center the map in the city that I selected. So far so good. My problem is that I have a refresh button on the mapview, and I want that, when I click on it can refresh the last city that I selected. I thought I could do it by getting the value of indexpath.row in my list of cities. But I do not know how, a开发者_运维百科nd if it's a good idea.

Any suggestions? Thanks


Of course you could store the row value into some member variable, like indexOfLastCitySelected, for later access. But I wouldn't do it this way, maybe later you'll add some filter mechanisms which may change the amount of cities visible in the tableview so that the same city will have another row index.

I suppose you have some datasource that you populate your list from - I'd either check which item from the datasource is the last selected city and then keep a reference or an index value (only use index if the datasource itself is static).


You would have been showing cities with the help of an array, if that is the case you should make a class level NSInteger and save your indexpath.row in that.

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