iOS 6上每个组件的UIPickerView固定标签存在问题

Question

我想显示一个UIPickerView，其中每个组件都有一些硬编码的文本。比如"小时"one_answers"分钟"。现在，我可以通过创建标签并将其作为子视图放入picker视图来实现这一点。这适用于iOS 7&在上面

但对于iOS6，我的标签被UIPickerView组件重叠，因此它们不可见。我如何在iOS 6中实现这种视图，其中每个组件的值都被标记到一个固定的标签上，这样用户就知道他们在选择什么。

Answer 1

我认为您可以通过构建一个包含picker视图和标签的自定义视图来实现这一点。

Answer 2

为了他人的利益，我就是这样做到的（基于Frog的建议）：

- (void)setDatePickerView:(MyCustomCell *)iCell {
    UIView *inputView = [[UIView alloc] init];
    // Add Picker First
    UIPickerView *pickerView = [[UIPickerView alloc] init];
    pickerView.delegate = self;
    pickerView.tag = 100;
    int height = 30;
    int offsetY = pickerView.frame.size.height / 2 - height / 2;
    // Add a line on top of selection
    if ([Utilities isIOS7orAbove]) {
        UIImageView *topLineView = [[UIImageView alloc] initWithFrame:CGRectMake(0, offsetY - 2, pickerView.frame.size.width, 1)];
        [topLineView setBackgroundColor:[UIColor grayColor]];
        [pickerView addSubview:topLineView];
    }
    [inputView addSubview:pickerView];
    // Add Minute Label
    CGFloat minLabelX = [Utilities isIOS7orAbove] ? 97 : 90;
    CGFloat labelYM = [Utilities isIOS7orAbove] ? 0.0 : 1.0;
    CGFloat labelW = 50;
    UILabel *minutesLabel = [[UILabel alloc] initWithFrame:CGRectMake(minLabelX, offsetY - labelYM, labelW, height)];
    minutesLabel.text = @“Mins";
    minutesLabel.font = [UIFont systemFontOfSize:kFontSize22];
    minutesLabel.backgroundColor = [UIColor clearColor];
    minutesLabel.textColor = [UIColor blackColor];
    [inputView addSubview:minutesLabel];
    // Now Add Seconds Label
    CGFloat secLabelX = [Utilities isIOS7orAbove] ? 230 : 218;
    UILabel *secondsLabel = [[UILabel alloc] initWithFrame:CGRectMake(secLabelX, offsetY - labelYM, labelW, height)];
    secondsLabel.text = @“Secs";
    secondsLabel.font = [UIFont systemFontOfSize:kFontSize22];
    secondsLabel.backgroundColor = [UIColor clearColor];
    secondsLabel.textColor = [UIColor blackColor];
    [inputView addSubview:secondsLabel];
    iCell.inputField.inputView = inputView;
}

Answer 3

只需使用ActionSheetPicker3.0，当我需要自定义选择器时，我会一直使用它。它与iOS6+完美配合。

以下是字符串选择器的使用方法：

NSArray *colors = [NSArray arrayWithObjects:@"Hours", @"Mins", @"Whatever", @"More", nil];
[ActionSheetStringPicker showPickerWithTitle:@"Select a Color"
                                        rows:colors
                            initialSelection:0
                                   doneBlock:^(ActionSheetStringPicker *picker, NSInteger selectedIndex, id selectedValue) {
                                      NSLog(@"Picker: %@, Index: %@, value: %@", 
                                      picker, selectedIndex, selectedValue);
                                    }
                                 cancelBlock:^(ActionSheetStringPicker *picker) {
                                      NSLog(@"Block Picker Canceled");
                                    }
                                      origin:sender];

享受吧！