ToolBar位于xcode中UIPIckerView的顶部？

问题描述

我需要在 UIPickerView 的顶部添加一个带有完成按钮的工具栏。我不想使用 actionSheet ，因为我希望视图的其余部分处于活动状态。我已经找到了以下代码：

I need to add a toolbar with done button on the top of UIPickerView. I don't want to use actionSheet because I want the rest of the view to be active. I've gone for the following code:

- (BOOL)textFieldDidBeginEditing:(UITextField *)textField {
  [txtstate resignFirstResponder];
  pickerView = [[UIPickerView alloc]init] ;
  pickerView.frame=CGRectMake(10, 75, 180,20);
  pickerView.delegate = self;
  pickerView.showsSelectionIndicator = YES;

  UIToolbar* toolbar = [[UIToolbar alloc] init];
  toolbar.frame=CGRectMake(0,75,180,10);
  toolbar.barStyle = UIBarStyleBlackTranslucent;
  UIBarButtonItem *flexibleSpaceLeft = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];


  UIBarButtonItem* doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
                                                                       style:UIBarButtonItemStyleDone target:self
                                                                      action:@selector(doneClicked:)];


   [toolbar setItems:[NSArray arrayWithObjects:flexibleSpaceLeft, doneButton, nil]];

   textField.inputAccessoryView = toolbar;
   [pickerView addSubview:toolbar];
   [self.view addSubview:pickerView];
}

通过使用上面的代码我的工具栏已添加，但隐藏在 UIPickerView ，它正在中间添加。如何让工具栏显示在前面（在 UIPickerView 的顶部）？

By using the above code my toolbar is added but it is hidden under UIPickerView and it is getting added in the middle. How can I make the toolbar come to the front (on the top of UIPickerView) ?

推荐答案

你可以使用这个getPicker

You can getPicker using this

-(void)getValuePicker
{
    ViewForValuePicker = [[UIView alloc]initWithFrame:CGRectMake(0, 219, 320, 266)];

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

    UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneBtnPressToGetValue)];

    [toolBar setItems:[NSArray arrayWithObject:btn]];
    [ViewForValuePicker addSubview:toolBar];


    valuePicker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 44, 320, 216)];
    valuePicker.delegate=self;
    valuePicker.dataSource=self;
    valuePicker.showsSelectionIndicator=YES;

    [ViewForValuePicker addSubview:valuePicker];

    [appDelegate.window addSubview:ViewForValuePicker];
} 

及其Delegete方法

And its Delegete Method

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}

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

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
{
    NSMutableArray *ary = [[NSMutableArray alloc] initWithArray:pickerValueAry];
    id str=[ary objectAtIndex:row];
    return str;
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{    
    NSLog(@"selectedRowInPicker >> %d",row);
}  

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