UITextField委託不工作

Question

我在我的iPad應用程序的UITableViewCell裏面有一個UITextField。如果我輸入文本，然後按解除鍵盤按鈕，它將保存文本，但如果我點擊更改視圖而不關閉鍵盤，它不會保存文本。

我使用此代碼嘗試resigning textField作爲第一響應者，但沒有運氣。

- (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

如果你只是想獲得的UITextField的文本，

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