IOS之UIPickerView添加确定，取消按钮

txtfield点击出现pickerview

if (txtField.tag == 301)
    {
        [txtField resignFirstResponder];
        UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@""
                                                                 delegate:self
                                                        cancelButtonTitle:nil
                                                   destructiveButtonTitle:nil
                                                        otherButtonTitles:nil, nil];
        self.m_actionSheet = actionSheet;
        [actionSheet release];
         
        UIToolbar   *pickerDateToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
        pickerDateToolbar.barStyle = UIBarStyleBlackOpaque;
        [pickerDateToolbar sizeToFit];
         
        NSMutableArray *barItems = [[NSMutableArray alloc] init];
         
        //
        UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStyleBordered target:self action:@selector(toolBarCanelClick)];
        [barItems addObject:cancelBtn];
        [cancelBtn release];
         
        //
        UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
        [barItems addObject:flexSpace];
        [flexSpace release];
         
        //
        UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithTitle:@"完成" style:UIBarButtonItemStyleDone target:self action:@selector(toolBarDoneClick)];
        [barItems addObject:doneBtn];
        [doneBtn release];
         
        [pickerDateToolbar setItems:barItems animated:YES];
        [m_actionSheet addSubview:pickerDateToolbar];
         
        UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 44, 0, 0)];
        pickerView.showsSelectionIndicator = YES;
        pickerView.dataSource = self;
        pickerView.delegate = self;
         
        [pickerView selectRow:1 inComponent:0 animated:YES];
        [m_actionSheet addSubview:pickerView];
        [pickerView release];
        [m_actionSheet showInView:self.view];
        [m_actionSheet setBounds:CGRectMake(0,0,320, 500)];
    }

点击完成可以获取picker选中值

-(void)toolBarCanelClick{
    [m_actionSheet dismissWithClickedButtonIndex:0 animated:YES];
}
-(void)toolBarDoneClick{
    [m_actionSheet dismissWithClickedButtonIndex:0 animated:YES];
//    UIDatePicker *datePicker=(UIDatePicker*)[datePickerSheet viewWithTag:DATE_PICKER_TAG];
//    birthdayField.text=[UIUtils convertUIDate:datePicker.date];
}

下边的就pickerview的delegate了，自己定义就行

#pragma mark pickview delegate
//组件数
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}
 
//每个组件的行数
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return [m_mutArrIntervalTime count]*50;
}
 
//初始化每个组件每一行数据
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return [m_mutArrIntervalTime objectAtIndex:(row%[m_mutArrIntervalTime count])];
}
 
//选中picker cell,save ArrayIndex
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    NSUInteger max = 0;
    NSUInteger base10 = 0;
    if(component == 0)
    {
        max = [m_mutArrIntervalTime count]*50;
        base10 = (max/2)-(max/2)%[m_mutArrIntervalTime count];
        [pickerView selectRow:[pickerView selectedRowInComponent:component]%[m_mutArrIntervalTime count]+base10 inComponent:component animated:false];
    }
}
 
//替换text居中
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(12.0f, 0.0f, [pickerView rowSizeForComponent:component].width-12, [pickerView rowSizeForComponent:component].height)];
     
    label.text = [m_mutArrIntervalTime objectAtIndex:(row%[m_mutArrIntervalTime count])];//[m_mutArrSensorList objectAtIndex:row-1];
    label.textAlignment = UITextAlignmentCenter;
    return [label autorelease];
}