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在tableview中滚动时,UI关闭状态不稳定

uiswitch uitableview objective-c ios

Vinod Radhakrishnan · 技术社区 · 7 年前

我正在一个tableview数据源函数(索引处的行的单元格)中以编程方式创建UISwitch。当我滚动表格视图时,关闭状态开关出现故障(UI)出现两轮。连接开关的屏幕截图。

谢谢你的帮助!

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
    UILabel *title = (UILabel*)[cell viewWithTag:80];
    UILabel *description = (UILabel*)[cell viewWithTag:81];
    UIView *innerView = (UIView *)[cell viewWithTag:82];

    innerView.layer.borderColor=[[UIColor colorWithRed:229/255.0f green:229/255.0f blue:229/255.0f alpha:1.0]  CGColor];
    innerView.layer.borderWidth = 2.0f;
    NSDictionary *displayDict = scenarioListsArray[indexPath.row];
    title.text =[displayDict objectForKey:@"name"];
    description.text = [displayDict objectForKey:@"description"];    
    UISwitch *myswitch = [[UISwitch alloc]initWithFrame:CGRectMake(cell.contentView.frame.size.width-60, (cell.contentView.frame.size.height/2)-20 , 100, 100)];
    myswitch.onTintColor = [UIColor colorWithRed:25/255.0f green:122/255.0f blue:66/255.0f alpha:1];
    [cell.contentView addSubview:myswitch];
    myswitch.tag = indexPath.row;
    [myswitch addTarget:self action:@selector(cellButtonClickAction:) forControlEvents:UIControlEventValueChanged];
    if ([[displayDict objectForKey:@"status"] isEqualToString:@"ACTIVE"]) {
        [myswitch setOn:YES animated:YES];

    }
    else
    {
        [myswitch setOn:NO animated:YES];
    }


    return cell;
}

2 回复 | 直到 7 年前

Vinod Radhakrishnan 7 年前

在创建switch之前,我也遇到了同样的问题,并用以下代码进行了修复

for(UIView *subView in cell. contentView.subviews){
        if ([subView isKindOfClass:[UISwitch class]]) {
        [subView removeFromSuperview];

    }
    }

或

static NSString *TableIdentifier = @"YourCellIdentifier";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:TableIdentifier];

if (cell == nil) {
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:TableIdentifier];
    //place your all UI elements code here.
  }

AshokPolu 7 年前

我已经更新了你的代码,试试这个会对你有用的,

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
    [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
    UILabel *title = (UILabel*)[cell viewWithTag:80];
    UILabel *description = (UILabel*)[cell viewWithTag:81];
    UIView *innerView = (UIView *)[cell viewWithTag:82];

    innerView.layer.borderColor=[[UIColor colorWithRed:229/255.0f green:229/255.0f blue:229/255.0f alpha:1.0]  CGColor];
    innerView.layer.borderWidth = 2.0f;
    NSDictionary *displayDict = scenarioListsArray[indexPath.row];
    title.text =[displayDict objectForKey:@"name"];
    description.text = [displayDict objectForKey:@"description"];    
    UISwitch *myswitch = [cell.contentView viewWithTag:indexPath.row+597];
    if(mySwitch == nil){
        myswitch = [[UISwitch alloc]initWithFrame:CGRectMake(cell.contentView.frame.size.width-60,(cell.contentView.frame.size.height/2)-20 , 100, 100)];
       [cell.contentView addSubview:myswitch];
       [myswitch addTarget:self action:@selector(cellButtonClickAction:) forControlEvents:UIControlEventValueChanged];

    }
    myswitch.onTintColor = [UIColor colorWithRed:25/255.0f green:122/255.0f blue:66/255.0f alpha:1];
    myswitch.tag = indexPath.row+597; //597 is extra number added to tag
    if ([[displayDict objectForKey:@"status"] isEqualToString:@"ACTIVE"]) {
        [myswitch setOn:YES animated:YES];
    }
    else
    {
        [myswitch setOn:NO animated:YES];
    }

    return cell;
}