Question

编辑：忘记分配代表，现在就可以使用。

    self.timePickerView.delegate = self;
        self.timePickerView.dataSource = self;

好的，所以我使用了UIDatePicker并且它工作正常，但我想要包括秒，所以不得不尝试使用自定义选择器。现在我的操作表和按钮弹出，但我的自定义选择器应该是的空间只是黑色，我知道我错过了一些东西或者只是采取了错误的方法。目标是让用户使用自定义选择器来选择一小时/分钟/秒来记录他们在跑步等上花费的时间......

我的主要问题是如何在单击文本字段时显示自定义选择器，我知道我在选择器本身的实现中缺少某些东西，也许这个自定义选择器不遵循组件的默认方法/行？我知道我之前使用的日期不需要那些吗？提前感谢任何见解。

标题

@property (strong, nonatomic) UIPickerView *timePickerView;
@property (strong, nonatomic) UIActionSheet *datePickerViewPopup;
@property (retain, nonatomic) NSMutableArray *hoursArray;
@property (retain, nonatomic) NSMutableArray *minutesArray;
@property (retain, nonatomic) NSMutableArray *secondsArray;

视图确实已加载

       NSString *stringValue = [[NSString alloc]init];
self.hoursArray = [[NSMutableArray alloc]init];
self.minutesArray = [[NSMutableArray alloc]init];
self.secondsArray = [[NSMutableArray alloc]init];
for (int i = 0; i < 61; i++) {
    stringValue = [NSString stringWithFormat:@"%d", i];
    if (i < 13) {
        [self.hoursArray addObject:stringValue];
    }
    [self.minutesArray addObject:stringValue];
    [self.secondsArray addObject:stringValue];
}

调用弹出窗口的单元格

    - (void)textFieldDidBeginEditing:(UITextField *)textField
{
   switch (textField.tag) {
    case 1003:
        [textField resignFirstResponder];

        NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
        [dateFormatter setTimeZone:[NSTimeZone systemTimeZone]];
        [dateFormatter setDateFormat:@"HH:mm:ss"];

        self.datePickerViewPopup = [[UIActionSheet alloc]init];
        const CGFloat toolBarHeight = 44.0f;
        self.timePickerView = [[UIPickerView alloc]initWithFrame:CGRectMake(0, toolBarHeight, 0, 0)];
        self.timePickerView.hidden = NO;

        UIToolbar *pickerToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, toolBarHeight)];
        pickerToolbar.barStyle = UIBarStyleBlackOpaque;
        [pickerToolbar sizeToFit];
        NSMutableArray *toolBarItems = [[NSMutableArray alloc]init];

        UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonPressed:)];
        [toolBarItems addObject:cancelButton];

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

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

        NSDateComponents *comps = [[NSDateComponents alloc]init];
        comps.hour = [self.timePickerView selectedRowInComponent:0];
        comps.minute = [self.timePickerView selectedRowInComponent:1];
        comps.second = [self.timePickerView selectedRowInComponent:2];
        NSCalendar *calerdar = [NSCalendar currentCalendar];
        NSDate *cardioTime = [calerdar dateFromComponents:comps];

        textField.text = [dateFormatter stringFromDate:cardioTime];

        [pickerToolbar setItems:toolBarItems animated:NO];

        [self.datePickerViewPopup addSubview:pickerToolbar];
        [self.datePickerViewPopup addSubview:self.timePickerView];
        [self.datePickerViewPopup showInView:self.view.superview];
        [self.datePickerViewPopup setBounds:CGRectMake(0, 0, self.view.frame.size.width, 464)];

        break;
}

}

选择器方法

   #pragma mark - Picker Methods

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 3;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
if (component == 0) {
    return [self.hoursArray count];
} else if (component == 1) {
    return [self.minutesArray count];
} else {
    return [self.secondsArray count];
}
}


- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
switch (component) {
    case 0:
        return [self.hoursArray objectAtIndex:row];
        break;
    case 1:
        return [self.minutesArray objectAtIndex:row];
        break;
    case 2:
        return [self.secondsArray objectAtIndex:row];
    default:
        break;
}
return nil;
}

Answer 1

您无需创建操作表。只需创建UIPickerView并将其分配给文本字段inputView

Answer 2

我只是一个菜鸟，我忘了在初始化选择器后添加以下内容。现在我只需要清理其余的混乱。

    self.timePickerView.delegate = self;
        self.timePickerView.dataSource = self;

实现自定义时间UIPickerView弹出问题IOS

2 个答案: