iphone – 在xcode中UIPIckerView顶部的ToolBar？

发布时间：2020-12-14 19:53:22 所属栏目：百科来源：网络整理

导读：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.我已经去了以下代码： - (BOOL)textFieldDidBeginEditing:(UITextField *)textField { [txtstate resignFirstResponder]; pickerView

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.我已经去了以下代码：

- (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(0,10);
  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,我的工具栏被添加,但它被隐藏在UIPickerView下,它被添加到中间.如何让工具栏显示在前面(在UIPickerView的顶部)？

解决方法

你可以使用这个getPicker

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

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

    [ViewForValuePicker addSubview:valuePicker];

    [appDelegate.window addSubview:ViewForValuePicker];
}

及其Delegete方法

-(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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（编辑：李大同）

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