ios - 使用 UISegmentedControl 更改 UITableView 的数据源(就像 Twitter 那样)

Question

我正在尝试创建一个 TableView ，其中可以根据在 UISegmentedControl 上选择的索引来更改数据源。我会发布我所拥有的。似乎不起作用!我想像 Twitter 在其个人资料页面上使用“推文、媒体收藏夹”分段 Controller 那样进行操作。

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

    switch (self.segmentedControliPhone4.selectedSegmentIndex) {
        case 0:
            return 10;
            break;
        case 1:
            return 15;
            break;
        case 2:
            return 5;
            break;
    }
    return 0;
}

-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
    return 30;
}

-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{

    self.segmentedControliPhone4 = [[HMSegmentedControl alloc] initWithSectionTitles:@[@"ACTIVITY FEED", @"HOT BOX", @"COLLECTIONS"]];
    self.segmentedControliPhone4.selectedSegmentIndex = 1;
    self.segmentedControliPhone4.frame = CGRectMake(0, 263, self.view.frame.size.width, 30);
    self.segmentedControliPhone4.selectionIndicatorLocation = HMSegmentedControlSelectionIndicatorLocationDown;
    self.segmentedControliPhone4.selectionStyle = HMSegmentedControlSelectionStyleBox;
    self.segmentedControliPhone4.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleLeftMargin;
    self.segmentedControliPhone4.backgroundColor = [UIColor blackColor];
    self.segmentedControliPhone4.textColor = [UIColor whiteColor];
    self.segmentedControliPhone4.font = [UIFont fontWithName:@"Lato" size:10];
    self.segmentedControliPhone4.selectedTextColor = [UIColor colorWithRed:0.016 green:0.850 blue:0.796 alpha:1];
    self.segmentedControliPhone4.selectionIndicatorColor = [UIColor colorWithRed:0.016 green:0.850 blue:0.796 alpha:1];
    [self.segmentedControliPhone4 addTarget:self action:@selector(segmentedControlIndexChanged:) forControlEvents:UIControlEventValueChanged];
    return self.segmentedControliPhone4;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell *cell;

    if(cell == nil){
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];
    }

    switch (self.segmentedControliPhone4.selectedSegmentIndex) {
        case 0:
            cell.textLabel.text = @"Acitivy Feed";
            cell.imageView.image = [UIImage imageNamed:@"brand.png"];
            break;
        case 1:
            cell.textLabel.text = @"Hot Box";
            break;
        case 2:
            cell.textLabel.text = @"Collections";
            break;
    }

    return cell;
}

-(void)segmentedControlIndexChanged:(HMSegmentedControl *)segmentedControl{

    if(segmentedControl.selectedSegmentIndex == 0){
        self.hotBoxTableView.hidden = NO;
        [self.hotBoxTableView reloadData];
    }
    else if(segmentedControl.selectedSegmentIndex == 1){
        self.hotBoxTableView.hidden = NO;
        [self.hotBoxTableView reloadData];
    }
    else if(segmentedControl.selectedSegmentIndex == 2){
        self.hotBoxTableView.hidden = NO;
        [self.hotBoxTableView reloadData];
    }
}

我正在使用自定义分段控件，但愿意更改为常规控件。如果您有任何见解或疑问，请告诉我!

非常感谢!!

Answer 1

两件事。

首先你应该在更新单元格之前清除数据

cell.textLabel.text = nil
cell.imageView.image = nil
switch (self.segmentedControliPhone4.selectedSegmentIndex) {
    case 0:
        cell.textLabel.text = @"Acitivy Feed";
        cell.imageView.image = [UIImage imageNamed:@"brand.png"];
        break;
    case 1:
        cell.textLabel.text = @"Hot Box";
        break;
    case 2:
        cell.textLabel.text = @"Collections";
        break;
}

其次，在 segmentedControlIndexChanged 中，您在不同的 if 语句中运行相同的代码。以下应该足够了

-(void)segmentedControlIndexChanged:(HMSegmentedControl *)segmentedControl{

    self.hotBoxTableView.hidden = NO;
    [self.hotBoxTableView reloadData];