点击 uipickerview 时键盘不退出

Posted 2023-03-11

【中文标题】点击 uipickerview 时键盘不退出

【英文标题】：Keyboard is not resigning when tapping uipickerview

【发布时间】：2012-10-04 05:38:21

【问题描述】：

我的搜索视图中有两个UIPickerView 和一个UITextField。当我首先输入/选择两个UIPickerView 然后我输入UITextField 时，一切正常。

但是当我改变输入UITextField然后选择UIPickerView的顺序时，发生的问题是当我点击UIPickerViews时键盘没有退出。

下面是我的代码

- (void) textFieldDidBeginEditing: (UITextField *) textField
//---------------------------------------------------------------

    if (textField == self.txtFieldPoetName) 
        NSLog(@"sdsdfsd");
      [textField resignFirstResponder];
      if ( [self.poetNameArray count] > 0 )
          [self showPoetNamePicker];
      

    
    else if (textField == self.txtFieldPoemType) 
        NSLog(@"jdjdjdjd");
        [textField resignFirstResponder];

        if( [self.poemTypeArray count] > 0 )
            [self showPoemTypePicker];
        
    



- (void) textFieldDidEndEditing:(UITextField *)textField

    [textField resignFirstResponder];



- (void)showPoetNamePicker 

    [self resignKeyboard];

    startXMLParser_ = NO;

    self.actionSheet = [[[UIActionSheet alloc] initWithTitle:nil delegate:nil cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil]autorelease];
    self.actionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent;
    self.actionSheet.title = @"Poet Name";
    self.poetNamePicker = [[[UIPickerView alloc] init]autorelease];
    self.poetNamePicker.showsSelectionIndicator = YES;
    self.poetNamePicker.dataSource = self;
    self.poetNamePicker.delegate = self;
    PickerType = 1;

    //Set up the display frame
    self.poetNamePicker.frame = CGRectMake(0, 35, 320, 120);

    //Add the picker to the view
    [self.actionSheet addSubview:self.poetNamePicker];

    UISegmentedControl *closeButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObject:@"Done"]];
    closeButton.momentary = YES; 
    closeButton.frame = CGRectMake(260, 6.0f, 50.0f, 27.0f);
    closeButton.segmentedControlStyle = UISegmentedControlStyleBar;
    closeButton.tintColor = [UIColor blackColor];
    [closeButton addTarget:self action:@selector(hidePicker:) forControlEvents:UIControlEventValueChanged];
    [self.actionSheet addSubview:closeButton];
    [closeButton release];

    [self.actionSheet showInView:self.appDelegate.tabBarController.view];
    [self.actionSheet setBounds:CGRectMake(0, 0, 320, 385)];


- (void)showPoemTypePicker 

    [self resignKeyboard];

    startXMLParser_ = YES;

    self.actionSheet = [[[UIActionSheet alloc] initWithTitle:nil delegate:nil cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil]autorelease];
    self.actionSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent;
    self.actionSheet.title = @"Poem Type";
    self.poemTypePicker = [[[UIPickerView alloc] init]autorelease];
    self.poemTypePicker.showsSelectionIndicator = YES;
    self.poemTypePicker.dataSource = self;
    self.poemTypePicker.delegate = self;
    PickerType = 2;

    //Set up the display frame
    self.poemTypePicker.frame = CGRectMake(0, 35, 320, 120);

    //Add the picker to the view
    [self.actionSheet addSubview:self.poemTypePicker];

    UISegmentedControl *closeButton = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObject:@"Done"]];
    closeButton.momentary = YES; 
    closeButton.frame = CGRectMake(260, 6.0f, 50.0f, 27.0f);
    closeButton.segmentedControlStyle = UISegmentedControlStyleBar;
    closeButton.tintColor = [UIColor blackColor];
    [closeButton addTarget:self action:@selector(hidePicker:) forControlEvents:UIControlEventValueChanged];
    [self.actionSheet addSubview:closeButton];
    [closeButton release];

    [self.actionSheet showInView:self.appDelegate.tabBarController.view];
    [self.actionSheet setBounds:CGRectMake(0, 0, 320, 385)];


- (void)hidePicker:(id)sender


  if( PickerType == 1 )
  
    if ( [self.poetNameArray count] > 0 &&
    [self.txtFieldPoetName.text length] == 0 )
    
        //self.poemTypeId = @"";
      self.txtFieldPoetName.text = [self.poetNameArray objectAtIndex:0];
      self.poetTypeId = [self.poetTypeIdArray objectAtIndex:0];
    
  
  else if( PickerType == 2 )
  
    if ( [self.poemTypeArray count] > 0  &&
    [self.txtFieldPoemType.text length] == 0)
    
        //self.poetTypeId = @"";
      self.txtFieldPoemType.text = [self.poemTypeArray objectAtIndex:0];
      self.poemTypeId = [self.poemTypeIdArray objectAtIndex:0];

    
  

  [self resignFirstResponder];
  self.actionSheet.hidden = YES;
  [self.actionSheet dismissWithClickedButtonIndex:1 animated:YES];

  if (startXMLParser_)
  
    [self performSelector:@selector(startXMLParsing) withObject:nil afterDelay:0.5];
  


-(void)resignKeyboard

    [self.txtFieldPoetName resignFirstResponder];
    [self.txtFieldPoemName resignFirstResponder];
    [self.txtFieldPoemType resignFirstResponder];

【问题讨论】：

你说你有一个 textField 但正在寻找 3 textField txtFieldPoetName, txtFieldPoemName, txtFieldPoemType

【参考方案1】：

编辑：

- (void) textFieldShouldBeginEditing: (UITextField *) textField

   if (textField == self.txtFieldPoetName)
   
      if( [self.poemNameArray count] > 0 )
       [self showPoetNamePicker];
      
      return NO;
   
   else if (textField == self.txtFieldPoemType)
   
     if( [self.poemTypeArray count] > 0 )
        [self showPoemTypePicker];
     
     return NO;
   
   else
   
     return YES;
   

---

在 showPoetNamePicker 中添加：

 - (void)showPoetNamePicker
 
     [self.view endEditing:YES];
     ........
     ........
 

【讨论】：

解决了因为我弄错了应该是textFieldShouldBeginEditing

点击 textfiled 时显示键盘，但点击 uipickerview 时不显示选择器

uipickers 和 textfield 都必须工作。我的问题是当点击 uitextfield（不是 uipicker）时键盘来了。这很好。当点击上面的 uitextfiled 这是一个 uipicker键盘未隐藏，并且通过重叠键盘来显示选择器视图。这就是问题

【参考方案2】：

您是否正确链接到委托？

【参考方案3】：

尝试改变这个方法，

 -(void)resignKeyboard

     [self.view endEditing:YES];

【参考方案4】：

我知道这是一个老问题，但我认为应该提到它......我认为更好的解决方案是使用每个 textField 的 inputView（以及可选的 inputAccessoryView）。类似的东西：

-(void)setupTextFields
  UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
  toolbar.items = [NSArray arrayWithObjects:[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(endEditing)], nil];

  self.txtFieldPoetName.inputView = self.poetNamePicker;
  self.txtFieldPoetName.inputAccessoryView = toolbar;
  self.txtFieldPoemType.inputView = self.poetTypePicker;
  self.txtFieldPoemType.inputAccessoryView = toolbar;


-(void)endEditing
  [self.txtFieldPoetName resignFirstResponder];
  [self.txtFieldPoemType resignFirstResponder];

操作系统确保为键盘切换选择器，反之亦然（我猜它显示在与键盘相同的视图中）。