更改自定义tableViewCell的背景颜色

Question

I want to change my cell's background color

I see other question but they are not correspond my situation

I want to do a notification tableView

for example,If user have read cell, the cell's background color will change to white

If not, the color is yellow

At beginning

I set color in

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

   if(read[[indexPath row]])
     [cell.backView setBckgroundColor:[UIColor whiteColor];
   else
     [cell.backView setBckgroundColor:[UIColor redColor];
}

It works, and then i want to change color in

tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath{
   read[[indexPath row]] = yes;
   [cell.backView setBckgroundColor:[UIColor whiteColor];
   cell.name.text = @"test";
}

it works too

BUT if i selection other cell, it change to orignial color

It seems it only can change ONE cell's color at same time

No matter I use

cell.backgroundColor
cell.contentView.backgroundColor
cell.backView 

it get the same result,can anyone help me

---

edit 4/20 20:13

I set read in

tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath

sorry for misdirection,i update code

and after i selection other cell, i don't call [tableView reload]

so i don't think this is the reason

By the way, everything(eg label) can change but background color

and if i select cell , it jump to other screen by navigation

---

Ans

conclusion first

tableView: cellForRowAtIndexPath: is well

and

tableView: willDisplayCell: is well too

both of them can change background color

but they execute when need to draw new cell or reload tableView

I still confuse why I can change label in didselectionRowAtIndexPath but i can't change color

Answer 1

Change color using tableView: willDisplayCell: method

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (...){ //do your stuff.
        [cell.backView setBckgroundColor:[UIColor redColor];
    } else {
        [cell.backView setBckgroundColor:[UIColor whiteColor];
    }
}

Answer 2

I think you want to set your variable "read" to YES in

tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath

and I guess you use only one variable to record the states just because you simplified it for posting here, otherwise you might want to record the state of each cell with separate variables.

Answer 3

You need to update the "read" property of the object at the index of your cell.

tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath {
   [cell.backView setBckgroundColor:[UIColor whiteColor];
   currentObjectForThisCell.read = YES;
}

then:

-(void)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath {
   if(currentObjectForThisCell.read)
     [cell.backView setBckgroundColor:[UIColor whiteColor];
   else
     [cell.backView setBckgroundColor:[UIColor redColor];
}

Answer 4

在已编辑的代码中，选择单元格时，将读取标志设置为YES并将颜色更改为白色，这很好，但是在cellForRowAtIndexPath:您将读取标志为YES的单元格设置为红色，将NO的标志设置为白色，与didSelectRowAtIndexPath:方法中的行为相反。

Answer 5

Try to get the Selected cell in the didSelectRowAtIndexPath

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

//set read property for the seleted index

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
cell.backgroundColor = [UIColor redColor];

}

Answer 6

您是否在“ didSelectRowAtIndexPath”中为tableView Set读取属性调用reloadData并重新加载tableView