如何在不手动滚动的情况下将 HMSegmentedControl 水平滚动到所选索引

Posted 2023-03-14

【中文标题】如何在不手动滚动的情况下将 HMSegmentedControl 水平滚动到所选索引

【英文标题】：How to scroll HMSegmentedControl horizontally to the selected index without manually scrolling

【发布时间】：2017-05-15 08:08:04

【问题描述】：

我正在使用HMSegmentedControl 6 个部分标题（周一、周二、周三、周四、周五、周六）。 当今天是星期五时，我想将 HMSegmentedControl 滚动到星期五的索引（即索引 4）。 我已将HMSegmentedControl.selectedSegmentIndex 设置为星期五的索引，但它没有滚动到该索引。 当我手动点击星期五然后HMSegmentedControl 滚动。 有谁知道我如何做到这一点。

segmentedControl = [[HMSegmentedControl alloc] initWithSectionTitles:@[NSLocalizedString(@"MONDAY", nil), NSLocalizedString(@"TUESDAY", nil), NSLocalizedString(@"WEDNESDAY", nil), NSLocalizedString(@"THURSDAY", nil), NSLocalizedString(@"FRIDAY", nil), NSLocalizedString(@"SATURDAY", nil)]];

    segmentedControl.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth;
    CGFloat viewWidth = CGRectGetWidth(self.view.frame);
    segmentedControl.frame = CGRectMake(0, 44, viewWidth, 45);
    segmentedControl.segmentEdgeInset = UIEdgeInsetsMake(0, 10, 0, 10);
    segmentedControl.backgroundColor = [Nav_Bar_Color toColor];
    segmentedControl.selectionStyle = HMSegmentedControlSelectionStyleFullWidthStripe;
    segmentedControl.selectionIndicatorLocation = HMSegmentedControlSelectionIndicatorLocationDown;
    segmentedControl.selectionIndicatorColor = [UIColor whiteColor];
    segmentedControl.verticalDividerEnabled = YES;
    segmentedControl.verticalDividerColor = [UIColor clearColor];
    segmentedControl.verticalDividerWidth = 1.5f;
    [segmentedControl setTitleFormatter:^NSAttributedString *(HMSegmentedControl *segmentedControl, NSString *title, NSUInteger index, BOOL selected) 
        NSAttributedString *attString = [[NSAttributedString alloc] initWithString:title attributes:@NSForegroundColorAttributeName : [UIColor whiteColor], NSFontAttributeName : [UIFont fontWithName:FONT_NAME size:FONT_SIZE]];
        return attString;
    ];
    [segmentedControl addTarget:self action:@selector(loadTimeTableData:) forControlEvents:UIControlEventValueChanged];

    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [calendar components:NSCalendarUnitWeekday fromDate:[NSDate date]];
    int weekdayNumber = [components weekday];
    weekdayNumber = weekdayNumber - 1;

    switch (weekdayNumber) 
        case 1:
        case 7:
            segmentedControl.selectedSegmentIndex = 0;
            break;
        case 2:
            segmentedControl.selectedSegmentIndex = 1;
            break;
        case 3:
            segmentedControl.selectedSegmentIndex = 2;
            break;
        case 4:
            segmentedControl.selectedSegmentIndex = 3;
            break;
        case 5:
            segmentedControl.selectedSegmentIndex = 4;
            break;
        case 6:
            segmentedControl.selectedSegmentIndex = 5;
            break;
        default:
            break;
    

    [segmentedControl setSelectedSegmentIndex:segmentedControl.selectedSegmentIndex animated:YES];

    [self.view addSubview:segmentedControl];

【问题讨论】：

分享那个的代码。

segmentedControl = [[HMSegmentedControl alloc] initWithSectionTitles:@[NSLocalizedString(@"MONDAY", nil), NSLocalizedString(@"TUESDAY", nil), NSLocalizedString(@"WEDNESDAY", nil), NSLocalizedString (@"THURSDAY", nil), NSLocalizedString(@"FRIDAY", nil), NSLocalizedString(@"SATURDAY", nil)]]; segmentedControl.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth; CGFloat viewWidth = CGRectGetWidth(self.view.frame); segmentedControl.frame = CGRectMake(0, 44, viewWidth, 45); segmentedControl.selectedSegmentIndex = 4;

你需要调用这个方法 - (void)setSelectedSegmentIndex:(NSUInteger)index animated:(BOOL)animated ..... 例如.. [segmentedControl setSelectedSegmentIndex:4 animated:YES];

@Zck 我已经调用了 setSelectedSegmentIndex 方法，但仍然 segmentedControl 没有滚动到该索引

你的 viewcontroller 中是否添加了任何 scrollView ？

【参考方案1】：

您应该在loadTimeTableData:method 中调用segementControl selected at indexmethod。