iOS 7：在textfield上确实更改了我的应用程序崩溃的第一个响应者 [英] iOS 7: on textfield did change the firstresponder my application is crashing

问题描述

我有可编辑的tableview单元格，当我从表格的第一个文本字段移动到最后一个文本字段时，它正在崩溃。代码是。下面的代码用于textfield委托

I have editable tableview cell,and when i move from first textfield to last textfield in the table it is crashing.Code is.The below code is for textfield delegate

-(void)textFieldDidBeginEditing:(UITextField *)sender
{
   NSIndexPath *indexpath = [NSIndexPath indexPathForRow:sender.tag inSection:1];
    EditableTextFieldCell *cell = (EditableTextFieldCell *)[self.documentdetailTable cellForRowAtIndexPath:indexpath];
    self.actField = cell.textFieldOne;
    if([self.actField canBecomeFirstResponder]){
        [self.actField becomeFirstResponder];
    }
}
 -(BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
   if (self.actField == textField) {
      [self.actField resignFirstResponder];
    }
    return YES;
}
-(void)textFieldDidEndEditing:(UITextField*)sender
{
if (self.quantityValue !=nil)
        {
            [self.quantityArray replaceObjectAtIndex:[sender tag] withObject:sender.text];
            [[self.documentItemsArray objectAtIndex:[sender tag]] setQUANTITY:[NSNumber numberWithDouble:[sender.text doubleValue]]];
            [self.documentdetailTable reloadData];
        }
}
- (BOOL)textFieldShouldClear:(UITextField *)textField {
self.quantityValue=@"";
return YES;
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}
-(void)textFieldDidChange:(UITextField *)theTextField
{
    NSLog( @"text changed: %@", theTextField.text);
    self.quantityTextField = theTextField;
    self.actField = theTextField;

}

//add the textfield listeners
[self.quantityTextField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingDidBegin];

但它崩溃了，我得到的消息如下：

But it is crashing and I am getting message like:

**EditableTextFieldCell _didChangeToFirstResponder:]: message sent to deallocated instance 0xc3c6bf0**

推荐答案

可能这个答案有点愚蠢但是正确答案。
我检查了tableview cellforrowatindexpath并添加了一个标识符

May be this answer somewhat is stupid but the correct answer. I have checked for tableview cellforrowatindexpath and added an identifier

static NSString *EditableTextFieldCellIdentifier = @"EditableCell";

// using custom cells to show textfield and multiple columns
EditableTextFieldCell *cellText = [tableView dequeueReusableCellWithIdentifier:EditableTextFieldCellIdentifier];

这解决了我的问题，也崩溃了。

And this fixed my problem and also crash.

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