UITextField 代表不工作

Question

我的 iPad 应用程序的 UITableViewCell 中有一个 UITextField。如果我输入文本，然后按关闭键盘按钮，它会保存文本，但如果我单击更改视图而不先关闭键盘，则不会保存文本。

我正在使用此代码尝试将 textField 作为第一响应者辞职，但没有运气。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    for (int it=0; it < [self.clinicalChecklist count]; ++it)
    {
        ClinicalChecklistCell *cell = (ClinicalChecklistCell *)[self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:it inSection:0]];
        UITouch *touch = [[event allTouches] anyObject];
        if ([cell.col1_singleEntryValue isFirstResponder] && [touch view] != cell.col1_singleEntryValue) {
            [cell.col1_singleEntryValue resignFirstResponder];
        }
        if ([cell.col2_singleEntryValue isFirstResponder] && [touch view] != cell.col2_singleEntryValue) {
            [cell.col2_singleEntryValue resignFirstResponder];
        }
        if ([cell.col1_doubleEntryValue_1 isFirstResponder] && [touch view] != cell.col1_doubleEntryValue_1) {
            [cell.col1_doubleEntryValue_1 resignFirstResponder];
        }
        if ([cell.col1_doubleEntryValue_2 isFirstResponder] && [touch view] != cell.col1_doubleEntryValue_2) {
            [cell.col1_doubleEntryValue_2 resignFirstResponder];
        }
        if ([cell.col2_doubleEntryValue_1 isFirstResponder] && [touch view] != cell.col2_doubleEntryValue_1) {
            [cell.col2_doubleEntryValue_1 resignFirstResponder];
        }
        if ([cell.col2_doubleEntryValue_2 isFirstResponder] && [touch view] != cell.col2_doubleEntryValue_2) {
            [cell.col2_doubleEntryValue_2 resignFirstResponder];
        }
        [super touchesBegan:touches withEvent:event];
    }
}

Answer 1

如果你只想获取 UITextField 的文本，

[myTextField addTarget:self action:@selector(getText) forControlEvents:UIControlEventEditingChanged];