Question

我有一个文本字段和选择器视图。当我选择文本字段选择器视图出现时如果我在选择器中选择行仍然我的文本字段是可编辑的。我想只在下拉列表中设置文本字段。还有一个问题，当我选择文本字段时，我的键盘是可见的

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


       [txtstate resignFirstResponder];//this is to hide key board
        txtstate.inputView=pickerView;


    ViewForValuePicker = [[UIView alloc]initWithFrame:CGRectMake(43,337, 212, 160)];
    UIToolbar *toolBar = [[UIToolbar alloc]initWithFrame:CGRectMake(43, 0, 212, 30)];
    toolBar.barStyle = UIBarStyleBlackOpaque;
    UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneBtnPressToGetValue)];
    [toolBar setItems:[NSArray arrayWithObject:btn]];

    [ViewForValuePicker addSubview:toolBar];
    pickerView = [[UIPickerView alloc]init] ;
    pickerView.frame=CGRectMake(43, 30, 212, 140);
    pickerView.delegate = self;
    pickerView.dataSource= self;
    pickerView.showsSelectionIndicator = YES;
         [ViewForValuePicker addSubview:pickerView];
    errstate.hidden=YES;
    [testScroll addSubview:ViewForValuePicker];
    [pickerView setHidden:NO];

   }


     - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row
      forComponent:(NSInteger)component reusingView:(UIView *)view {
     UILabel *retval = (id)view;
         if (!retval) {
          retval= [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f,
             [pickerView    rowSizeForComponent:component].width,
                     [pickerView rowSizeForComponent:component].height)] ;
   }
   retval.text = [[arr objectAtIndex:row]objectForKey:@"Code"];
    retval.font = [UIFont fontWithName:@"Helvetica-Bold" size:12];


  return retval;
 }


     - (void)doneBtnPressToGetValue{

      [pickerView resignFirstResponder];

    [pickerView removeFromSuperview];
       txtcity.text=nil;
    autocompleteTableView.hidden=YES;
     [ ViewForValuePicker removeFromSuperview];


 }

  -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {

     return 1;
    }

 - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component 
  { 
   txtLId.text=[[arr objectAtIndex:row] valueForKey:@"LId"]; 

    txtstate.text= [[arr objectAtIndex:row] valueForKey:@"Code"];
   //txtstate.userInteractionEnabled=NO;

 } 

 - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component; 
 { 
return [arr count]; 
 } 

  - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component; 
 { 

   return [[arr objectAtIndex:row] valueForKey:@"Code"]; 
 }

Answer 1

您好请尝试使用您的代码更新以下代码，或在http://pastie.org/6569798检查完整代码： -

首先定义

UIActionSheet *actionSheet;

在头文件（.h）中。

- (void)createActionSheet {
    if (actionSheet == nil)
    {
        actionSheet = [[UIActionSheet alloc] initWithTitle:@"Select" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];

        UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
        pickerToolbar.barStyle = UIBarStyleBlackOpaque;
        [pickerToolbar sizeToFit];

        NSMutableArray *barItems = [[NSMutableArray alloc] init];

        UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
        [barItems addObject:flexSpace];
        [flexSpace release];

        UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneBtnPressToGetValue)];
        [barItems addObject:doneBtn];
        [doneBtn release];

        [pickerToolbar setItems:barItems animated:YES];
        [barItems release];

        [actionSheet addSubview:pickerToolbar];
        [pickerToolbar release];

        [actionSheet showInView:self.view];
        [actionSheet setBounds:CGRectMake(0,0,320, 464)];
    }
}

-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
     [textField resignFirstResponder];
     return YES;
}

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

    if(textField==txtstate)
    {
        pickerView = [[UIPickerView alloc]init] ;
        pickerView.frame=CGRectMake(0, 44, 320, 420);
        pickerView.delegate = self;
        pickerView.dataSource= self;
        pickerView.showsSelectionIndicator = YES;
        [pickerView setHidden:NO];

        [self createActionSheet];
        [actionSheet addSubview:pickerView];
        [textField resignFirstResponder];
    }
}


- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row
          forComponent:(NSInteger)component reusingView:(UIView *)view
{
    UILabel *retval = (id)view;
    if (!retval) {
        retval= [[UILabel alloc] initWithFrame:CGRectMake(0.0f, 0.0f,
                                                          [pickerView    rowSizeForComponent:component].width,
                                                          [pickerView rowSizeForComponent:component].height)] ;
    }
    retval.text = [arr objectAtIndex:row];
    retval.font = [UIFont fontWithName:@"Helvetica-Bold" size:12];


    return retval;
}


- (void)doneBtnPressToGetValue
{
    [txtstate resignFirstResponder];

    [actionSheet dismissWithClickedButtonIndex:0 animated:YES];
    [actionSheet release];
    actionSheet = nil;
}

Answer 2

使用textfield.inputview在viewDidLoad中分配您的pickerView。

在textFieldDidBeginEditing中 - 不再需要代码。

同样使用您的UIPickerViewDelegate方法。

Answer 3

如果您希望在选择文本字段时只显示选择器视图，请在textFieldDidBeginEditing中获取您现在拥有的所有代码并将其移至viewDidLoad。如果您事先初始化txtstate.inputView=pickerView;，它将替换键盘作为主要输入。

当选择器视图选中时键盘仍然可见

3 个答案: