Question

UITableViewCell的contentView中的UITextField的值获取有几种方法

Answer 1

UITableViewCell的contentView中的UITextField的值获取有几种方法，本人简单总结一下。
1. 获取UITextField所以Cell的NSIndexPath,知道了NSIndexPath就知道了这个UITextField是干什么的了。
可以在
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
//get cell
UITableViewCell *cell = [UITableViewCell ][[textField superview] superview];
NSIndexPath *indexPath = [tableView indexPathForCell:cell];
}

或

- (void)textFieldDidEndEditing:(UITextField *)textField
{
//get cell
UITableViewCell *cell = (UITableViewCell *)[[textField superview] superview];
NSIndexPath *indexPath = [tableView indexPathForCell:cell];
}

中得知道UITextField中text是哪一个数据结构的值，前一个是实时的，后一个是失去焦点时一次性的。

2。第二种方法与上面第一个有点类似也是实时的，
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSInteger row = [indexPath row]; static NSString *CellIdentifier = @"CellIdentifier"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; cell.selectionStyle = UITableViewCellSelectionStyleNone; } cell.textLabel.text = [_passwordArray objectAtIndex:row]; CGRect textFieldRect = CGRectMake(0.0, 0.0f, 215.0f, 31.0f); UITextField *theTextField = [[UITextField alloc] initWithFrame:textFieldRect]; theTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter; theTextField.returnKeyType = UIReturnKeyDone; theTextField.secureTextEntry = YES; theTextField.clearButtonMode = YES; theTextField.tag = row; theTextField.delegate = self; //此方法为关键方法 [theTextField addTarget:self action:@selector(textFieldWithText:) forControlEvents:UIControlEventEditingChanged]; switch (row) { case 0: theTextField.placeholder = @"请输入旧密码"; break; case 1: theTextField.placeholder = @"请输入新密码"; break; case 2: theTextField.placeholder = @"请再次输入新密码"; break; default: break; } cell.accessoryView = theTextField; [theTextField release]; return cell; } - (void)textFieldWithText:(UITextField *)textField { switch (textField.tag) { case 0: self.theOldPassword = textField.text; break; case 1: self.theNewPassword = textField.text; break; case 2: self.theTwiceNewPassword = textField.text; break; default: break; } }