如何按升序排序NSMutableArray，iPhone？ [英] How to sort NSMutableArray in ascending order, iPhone?

问题描述

我有SQLite数据库（DB）并将其作为模型类并在NSMutableArray中获取数据库。我的DB与此DB类似。
StudentName | RegisterNumber | DatesOfJoin（DoJ）
我在tableView中成功显示了DoJ，但我想在tableView中按升序和降序排序DatesOfJoin。
任何帮助将不胜感激，并提前感谢您。

I have SQLite Database(DB) and made this to model class and taken the data of DB in NSMutableArray. My DB is similar to this DB. StudentName | RegisterNumber | DatesOfJoin(DoJ) I am displaying the DoJ in tableView successfully, but I wanna sort the DatesOfJoin in Ascending order and Descending order in tableView. Any help would be appreciated and Thanks you in advance.

推荐答案

您可以使用 NSSortDescriptor 和 sortUsingDescriptors：sortDescriptors 对可变数组进行排序。

You can use NSSortDescriptor and sortUsingDescriptors:sortDescriptors to sort a mutable array.

NSSortDescriptor *sortDescriptor;
sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"DatesOfJoin" ascending:YES];
NSArray *sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
[array sortUsingDescriptors:sortDescriptors];
[sortDescriptor release];

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