如何在uipickerview上添加完成按钮

Question

我在按钮单击操作上编写了以下代码，以创建 ui 选择器视图

- (IBAction)selectbtn:(id)sender {
    pickerview = [[UIPickerView alloc] initWithFrame:CGRectMake(5, 40, 300, 300)];
    pickerview.showsSelectionIndicator = YES;
    pickerview.hidden = NO;
    pickerview.delegate = self;
    [self.view addSubview:pickerview];
}

这是我的选择器代表

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


}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return self.jsonresultarr.count;


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

//    return [[self.jsonresultarr objectAtIndex:row] objectForKey:@"Company_Id"];
  //  NSObject *companyId = [[self.jsonresultarr objectAtIndex:row] objectForKey:@"Company_Id"];
    NSObject *companyName = [[self.jsonresultarr objectAtIndex:row] objectForKey:@"Company_Name"];
    return [NSString stringWithFormat:@"%@", companyName, nil];




}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    self.Textbox.text=[[self.jsonresultarr objectAtIndex:row] objectForKey:@"Company_Name"];
    [self.pickerview removeFromSuperview];


}

我的问题是我想在 uipicker 视图上显示完成按钮，其功能是在我的文本字段中设置选定的值。我怎么能做到。提前感谢

Answer 1

你可以用这个。首先在你的 self.view 中添加 UIView。添加UIPickerView 和UIToolBar 初始化。并将 IBAction 方法与 UIBarButtonItem 绑定。请检查附件截图。

也许这会对你有所帮助。

Answer 2

你应该使用UIBarButtonItem && UIToolbar

// add a toolbar with Done button
UIToolbar *toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
toolBar.barStyle = UIBarStyleBlackOpaque;

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

[toolBar setItems:[NSArray arrayWithObjects:doneButton, nil]];
self.pickerViewTextField.inputAccessoryView = toolBar;

点击完成按钮时触发选择器视图

- (void)doneTouched:(UIBarButtonItem *)sender
{
    // hide the picker view
    [self.pickerViewTextField resignFirstResponder];

    // perform some action
}

您可以在didSelectRow委托方法中获取选定的值。

Answer 3

试试这个

  UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(done)];
 cancelButton=[[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStylePlain target:self action:@selector(cancel)];
[cancelButton setTintColor:[UIColor whiteColor]];
    UIToolbar *toolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height-PickerView.frame.size.height-50, 320, 50)];
    NSArray *toolbarItems = [NSArray arrayWithObjects:cancelButton,doneButton,nil];
[toolbar setItems:toolbarItems];
self.textfield1.inputAccessoryView = toolbar;

where is done 方法如下

-(void)done{
 self.textfield1.text =[Array objectAtIndex:];
// for you it 
//self.Textbox.text=[[self.jsonresultarr objectAtIndex:[PickerView selectedRowInComponent:0]] objectForKey:@"Company_Name"];
}

而取消方法是

-(void)cancel{
[self.view endEditing:YES];
}

Answer 4

你可以简单地使用这个方法（适用于ios8）

actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:nil    
destructiveButtonTitle:nil otherButtonTitles:nil];

    [actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent];
    CGRect pickerFrame = CGRectMake(0, 0, 0, 0);
    UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:pickerFrame];
    pickerView.showsSelectionIndicator = YES;
    pickerView.dataSource = self;
    pickerView.delegate = self;
    txtPriorityTemp=myTextField;
    [actionSheet addSubview:pickerView];

    alertController = [UIAlertController alertControllerWithTitle:nil
                                                          message:@"\n\n\n\n\n\n\n\n\n\n"
                                                   preferredStyle:UIAlertControllerStyleActionSheet];
    //pickerView.frame=CGRectMake(0, 0, 120, 30);
    UIView *toolView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 305.0f, 44.f)];
    toolView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"blank-headerNew.png"]];
    CGRect buttonFrame = CGRectMake(220, 5, 70, 30);
    UIButton *selButton = [[UIButton alloc] initWithFrame:buttonFrame];
    //[selButton setBackgroundImage:[UIImage imageNamed:@"red_bgnew.png"] forState:UIControlStateNormal];
    [selButton setTitle:@"Done" forState:UIControlStateNormal];
    [selButton addTarget: self
                  action: @selector(dismissActionSheet:)
        forControlEvents: UIControlEventTouchDown];
    selButton.tag= myTextField.tag+10;
    [toolView addSubview:selButton];
    [alertController.view addSubview:pickerView];
    [alertController.view addSubview:toolView];
    [self presentViewController:alertController animated:YES completion:nil];
    }