Question

我有一个UITableViewController的联系人，当点击联系人时，我想从tableviewcontroller执行一个segue到实际的控制器。

这是我在-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {运行的代码：

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 

{
  // A lot of code, but it's basically saying: dependent of the section and whether you're searching or not, store the name and number you've selected.

  number = [[NSMutableArray alloc]init];
  if(indexPath.section == 0 && [self.usersWithNamesAndNumbers count] > 0){
    if (self.searchDisplayController.isActive) {
      index = [[self.searchDisplayController searchResultsTableView] indexPathForSelectedRow];
      name = [[self.searchedUsersWithNamesAndNumbers allKeys] objectAtIndex:index.row];
      number = [[self.searchedUsersWithNamesAndNumbers allValues] objectAtIndex:index.row];
    } else {
      index = [self.tableView indexPathForSelectedRow];
      name = [[self.usersWithNamesAndNumbers allKeys] objectAtIndex:index.row];
      number = [[self.usersWithNamesAndNumbers allValues] objectAtIndex:index.row];
    }
  } else {
    if (self.searchDisplayController.isActive) {
      index = [[self.searchDisplayController searchResultsTableView] indexPathForSelectedRow];
      name = [[self.searchedContactNamesWithNumbers allKeys] objectAtIndex:index.row];
      number = [[self.searchedContactNamesWithNumbers allValues] objectAtIndex:index.row];
    } else {
      index = [self.tableView indexPathForSelectedRow];
      name = [[self.contactNamesWithNumbers allKeys] objectAtIndex:index.row];
      number = [[self.contactNamesWithNumbers allValues] objectAtIndex:index.row];
    }
  }

  [self performSegueWithIdentifier:@"moveToView" sender:self];
  [tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition:UITableViewScrollPositionNone];
  [tableView deselectRowAtIndexPath:indexPath animated:YES];
}

我也在prepareForSegue方法中获得了一些代码：

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
  if([[segue identifier] isEqualToString:@"moveToView"]){
    [[segue destinationViewController] setDidComeFromContacts:YES];
    [[segue destinationViewController] setNameLabelContents:[NSString stringWithFormat:@"%@,", name]];
    [[segue destinationViewController] setPhoneNumberLabelContents:number];
    [[segue destinationViewController] setText:@"Segue text"];
    [[segue destinationViewController] setCardId:@"EDf8oCCol2"];
  }
}

处理此代码大约需要2-3秒。我还有两个其他的segue到同一个VC，那些长约1s，但仍然1-2s。这可能与destinationViewController内的设置有关，还是在segue之前的设置？

非常感谢

Answer 1

问题是由于目标视图控制器的initWithCoder方法中的长时间运行操作。将该代码移动到viewDidAppear中，以及viewDidLoad中依赖于initWitCoder中该代码结果的任何代码。这应该允许segue快速完成。最终，如果可能的话，您将需要尝试解决缓慢运行方法的问题。

Segue需要很长时间才能完成

1 个答案: