Question

我使用以下代码在tableview中显示一些标签和textview。但问题是在滚动时在一些不需要的地方覆盖一些文本视图。请帮我。提前致谢

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

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    }
    cell.selectionStyle                                         =   UITableViewCellSelectionStyleNone;
    cell.backgroundColor=[UIColor whiteColor];
    if (indexPath.row==0) 
    {
        UILabel *Sender = [[UILabel alloc] initWithFrame:CGRectMake(20, 10, 200, 20)];
        Sender.text=@"From Time";
        Sender.textColor=[UIColor colorWithRed:77.0/255.0 green:104.0/255.0 blue:159.0/255.0 alpha:1.0]; 
        Sender.font=[UIFont fontWithName:@"verdana" size:16];
        [cell addSubview:Sender];
        [Sender release];  

    }

    if (indexPath.row==1) 
    {
        UILabel *Sender = [[UILabel alloc] initWithFrame:CGRectMake(20, 10, 200, 20)];
        Sender.text=@"Sender";
        Sender.textColor=[UIColor colorWithRed:77.0/255.0 green:104.0/255.0 blue:159.0/255.0 alpha:1.0]; 
        Sender.font=[UIFont fontWithName:@"verdana" size:16];
        [cell addSubview:Sender];
        [Sender release];  
        UILabel *Label = [[UILabel alloc] initWithFrame:CGRectMake(30, 35, 200, 20)];
        Label.text=@"Achuthananthan";
        Label.font=[UIFont fontWithName:@"verdana" size:14];
        [cell addSubview:Label];
        [Label release]; 
    }
    if (indexPath.row==2) 
    {
        UILabel *Agenda = [[UILabel alloc] initWithFrame:CGRectMake(20, 10, 200, 20)];
        Agenda.text=@"Agenda";
        Agenda.textColor=[UIColor colorWithRed:77.0/255.0 green:104.0/255.0 blue:159.0/255.0 alpha:1.0]; 
        Agenda.font=[UIFont fontWithName:@"verdana" size:16];

        [cell addSubview:Agenda];
        [Agenda release]; 
        UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(20, 30, 280, 120)];
        textView.editable=NO;
        textView.text=[NSString stringWithString:@"Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiuda."];
        textView.font=[UIFont fontWithName:@"verdana" size:14];
        [cell addSubview:textView];

        [textView release];

    }
    return cell;
}

Answer 1

移动在if (cell == nil) {部分

中添加视图的代码

例如，如果您想添加UILabel，请执行以下操作

UILabel *label;
if (cell == nil) {
    //create the cell
    //Create the label
    //Give the label a tag
    label.tag = 111; //for example
    //add label to the cell
    [cell.contentView addSubView:label];
}

//Now get the label of the cell
label = (UILabel*) [cell viewWithTag:111];

对要添加到单元格的所有UILabel和其他视图重复此操作

Answer 2

使用此代码...

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

static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    cell.selectionStyle =   UITableViewCellSelectionStyleNone;
        cell.backgroundColor=[UIColor whiteColor];

 UILabel *Sender = [[UILabel alloc] initWithFrame:CGRectMake(20, 10, 200, 20)];
     [sender setTag:500];
Sender.font=[UIFont fontWithName:@"verdana" size:16];
    Sender.textColor=[UIColor colorWithRed:77.0/255.0 green:104.0/255.0 blue:159.0/255.0 alpha:1.0]; 
    [cell addSubview:Sender];
    [Sender release];  

    UILabel *Label = [[UILabel alloc] initWithFrame:CGRectMake(30, 35, 200, 20)];
    Label.text=@"Achuthananthan";
    Label.font=[UIFont fontWithName:@"verdana" size:14];
    [Label setTag:600];
    [cell addSubview:Label];
    [Label release]; 

UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(20, 30, 280, 120)];
    textView.editable=NO;
[Label setTag:700];
    textView.text=[NSString stringWithString:@"Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Nam liber te conscient to factor tum poen legum odioque civiuda."];
    textView.font=[UIFont fontWithName:@"verdana" size:14];
    [cell addSubview:textView];
    [textView release];

}

UILabel *firstLabel = (UILabel*)[cell viewWithTag:500];
UILabel *SecondLabel = (UILabel*)[cell viewWithTag:600];
UITextView *firstText = (UITextView*)[cell viewWithTag:700];

if (indexPath.row==0) 
{

    firstLabel.text=@"From Time";
[SecondLabel setHidden:Yes];
[firstText setHidden:Yes];

}

if (indexPath.row==1) 
{

    firstLabel.text=@"Sender";
[SecondLabel setHidden:NO];
[firstText setHidden:Yes];

}
if (indexPath.row==2) 
{
    firstLabel.text=@"Agenda";
[SecondLabel setHidden:Yes];
[firstText setHidden:NO]; 
}
return cell;
 }

侧视图中的Textview在iphone中覆盖

2 个答案: