Question

@Luda's answer is a great answer，但当我需要将它用于多个文本字段时，我遇到了困难，因此我将其编辑为以下内容：

首先，我为每个textField获取IBOutlets，例如：textField1，textField2

然后我将代码编辑为

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIToolbar* numberToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
    numberToolbar.barStyle = UIBarStyleBlackTranslucent;
    numberToolbar.items = [NSArray arrayWithObjects:
                         [[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelNumberPad:)],
                         [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
                         [[UIBarButtonItem alloc]initWithTitle:@"Apply" style:UIBarButtonItemStyleDone target:self action:@selector(sendToServer:)],
                     nil];
    [numberToolbar sizeToFit];
    textField1.inputAccessoryView = numberToolbar;
    textField2.inputAccessoryView = numberToolbar;
}

-(void)cancelNumberPad:(UITextField *)textField
{
   //here I use if/else to determine which textField was tapped
   if(textField == self.textField1)
   {
      //do some stuff
   }else //...

}

-(void) sendToServer:(UITextField *)textField
{
    //here I use if/else to determine which textField was tapped
   if(textField == self.textField1)
   {
      //do some stuff
   }else //...
}

请注意我必须将冒号:添加到@selector，例如@selector(sendToServer:)这样就可以将正确的TextField作为参数传递。

但是

它不起作用。测试失败：if(textField == self.textField1)。所以有人知道如何做到这一点吗？

问题是：我如何知道正在编辑哪个文本字段？

Answer 1

检查if (textField == self.textField)失败的原因是因为默认情况下传递给UIBarButtonItem选择器的参数实际上是UIBarButtonItem本身。您可以通过在selector方法中放置断点并检查textField参数来验证这一点。

一个可能的解决方案是在没有引入任何代码来循环子视图的情况下，将视图控制器声明为UITextFieldDelegate，然后按如下方式修改选择器：

- (void)sendToServer:(UIBarButtonItem*)barButtonItem {
    [self.view endEditing:NO];
}

然后实现委托方法textFieldShouldEndEditing：

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
    // here you would determine which text field the UIBarButtonItem was associated with
   if(textField == self.textField1)
   {
       // your code here
       // and then, if you wanted to dismiss the keyboard
       return YES;
   } else {
       return NO;
   }
}

Answer 2

尝试使用标签像这样：

textFiled1.tag = 1;
textFiled2.tag = 2;

//当您的文本字段开始编辑时，将调用此方法。

- (void)textFieldDidBeginEditing:(UITextField *)textField

{

NSLog(@"tag ==%d",textField.tag);
if(textField.tag == 1){
   //do sth
  }

}

顺便说一下，你应该在你的XX.h文件中声明UITextFieldDelegate

在多个UITextField的数字键盘上显示完成按钮

2 个答案: