我想删除一个表视图单元格,但在该操作发生之前,我想给用户一个警报视图.我懂了：
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Warning"
message:@"Are you sure?"
delegate:self
cancelButtonTitle:@"NO"
otherButtonTitles:@"YES",nil];
[alert show];
[self.array removeObjectAtIndex:indexPath.row];//or something similar to this based on your data source array structure
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
if([title isEqualToString:@"Nee"])
{
NSLog(@"Nothing to do here");
}
else if([title isEqualToString:@"Ja"])
{
NSLog(@"Delete the cell");
}
}
但是现在当我在单元格上向右滑动并且删除按钮出现时,我没有AlertView.当我按下删除按钮时,我只获得AlertView.当我按下删除按钮时,会出现消息,但单元格已被删除.
如何使这项工作？所以当我滑动时有一个AlertView.
关于序列,一切都很好.只有在按下删除按钮时才会调用commitEditingStyle.关键是你实际上在响应警报之前删除了对象.把它改成这个：
@interface PutYourViewControllerClassNameHere @property (strong,nonatomic) NSIndexPath *indexPathToBeDeleted; @end
然后：
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
self.indexPathToBeDeleted = indexPath;
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Warning"
message:@"Are you sure?"
delegate:self
cancelButtonTitle:@"NO"
otherButtonTitles:@"YES",nil];
[alert show];
// do not delete it here. So far the alter has not even been shown yet. It will not been shown to the user before this current method is finished.
}
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
// This method is invoked in response to the user's action. The altert view is about to disappear (or has been disappeard already - I am not sure)
NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
if([title isEqualToString:@"NO"])
{
NSLog(@"Nothing to do here");
}
else if([title isEqualToString:@"YES"])
{
NSLog(@"Delete the cell");
[self.array removeObjectAtIndex:[self.indexPathToBeDeleted row]];
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:self.indexPathToBeDeleted] withRowAnimation:UITableViewRowAnimationFade];
}
}
