Programmaticlaly moving rows with animation in UIT

问题:

I want to move a row to the bottom of my UITableView with cool animation effect just like in this Grocery Shopping List app.

Just like we can move rows with reordering control like:

How can I create such animation?

回答1:

In IOS 5 this can be done with the following UITableView selector:

- (void)moveRowAtIndexPath:(NSIndexPath *)indexPath toIndexPath:(NSIndexPath *)newIndexPath

For example:

[self.tableView moveRowAtIndexPath:indexPath toIndexPath:[NSIndexPath indexPathForRow:[items count] - 1 inSection:1]];

回答2:

Important: This answer assumes iPhone OS 3.x. See the answer above for iOS 5.x

I don't know what is the "cool animation effect just like in Grocery Shopping List app". Not everyone has that app.

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Rows cannot be moved programmatically.

However, you can simultaneously insert and delete a row to simulate a move.

[tableView beginUpdates];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:rowToMove]
                 withRowAnimation:UITableViewRowAnimationLeft];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPathToMoveTo]
                 withRowAnimation:UITableViewRowAnimationLeft];
// update your dataSource as well.
[tableView endUpdates];

回答3:

This is kind of similar to what I have done to allow drag and drop from one scrollview to another.

You will want to create a duplicate/dummy cell (for visual effect), then remove the original cell, then animate the duplicate, then insert into the bottom and then finally remove the duplicate/dummy cell.