Question

我有一个简单的剖面表视图。我在图像的左侧添加了一个按钮。此按钮是可选择的。一次只能选择一个按钮（每个单元格具有相同类型的单个按钮），并且所选按钮背景图像将更改为特定的所选图像，其他按钮背景图像更改为取消选择图像。如果再次点击所选图像，它将保持选中状态。我怎么没有得到正确的行为。代码：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//  UITableViewCell *cell=nil;
CustomCellMasterCustomer *cell=nil;

static NSString *cellIdentifier=@"Locations";
Customer *mCustomer;
cell=[tableView dequeueReusableCellWithIdentifier:cellIdentifier];

if(cell==nil){
//      cell=[self reusableContentWithIdentifier:cellIdentifier];
    cell=(CustomCellMasterCustomer *)[self reusableContentWithIdentifier:cellIdentifier];

}

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.tag = indexPath;
[button setBackgroundImage:[UIImage imageNamed:@"cellLeftImageDisabled.png"] forState:UIControlStateNormal];
[button setFrame:CGRectMake(10, 5, 36, 30)];
[button addTarget:self action:@selector(viewDetail:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:button];

cell.aCustomer = mCustomer;//alok added

if (indexPath == self.mPreviousIndex)
{
    [button setBackgroundImage:[UIImage imageNamed:@"cellLeftImageEnabled.png"] forState:UIControlStateNormal];
}
else
{
    [button setBackgroundImage:[UIImage imageNamed:@"cellLeftImageDisabled.png"] forState:UIControlStateNormal];

}
return cell;

}

-(void)viewDetail:(id)sender
{
CGPoint buttonOrigin = [sender frame].origin;
// this converts the coordinate system of the origin from the button's superview to the table view's coordinate system.
CGPoint originInTableView = [self.allCustomerTable convertPoint:buttonOrigin fromView:[sender superview]];

                             // gets the row corresponding to the converted point
                             NSIndexPath *rowIndexPath = [self.allCustomerTable indexPathForRowAtPoint:originInTableView];


CustomCellMasterCustomer *cell = (CustomCellMasterCustomer *)[self.allCustomerTable cellForRowAtIndexPath:rowIndexPath];

[self fillDetailViewWithCustomerInformation:cell.aCustomer];

//change button background image


UIButton *btn = (UIButton *)sender;

[btn setBackgroundImage:[UIImage imageNamed:@"cellLeftImageEnabled.png"] forState:UIControlStateNormal];
self.mPreviousIndex = rowIndexPath;
[self.allCustomerTable reloadData];

}

我正在做什么错，任何建议

Answer 1

试试这个。因为indexpath总是使用相同的行和节号重新创建。它与以前不一样。

if (indexPath.row == self.mPreviousIndex.row && indexPath.section == self.mPreviousIndex.section)
{
    [button setBackgroundImage:[UIImage imageNamed:@"cellLeftImageEnabled.png"] forState:UIControlStateNormal];
}

这两行代码，不再需要了

/* UIButton *btn = (UIButton *)sender;

    [btn setBackgroundImage:[UIImage imageNamed:@"cellLeftImageEnabled.png"] forState:UIControlStateNormal];*/

Answer 2

您不应在if块旁边添加按钮。在UITableView单元格中将重复使用，如果单元格被重用，并且已经有一个按钮添加到contentView，那么您不应再添加一个按钮。因此，通过在customCell.h中声明buttion属性，创建一个自定义单元格并使该类实例在类外可见。现在检查条件 -

if (selected)

{

    cell.button.backgroundImage = selectedImage;

}

else

{

    cell.button.backgroundImage = unselectedImage;

}

在分段表中一次设置一个选定/未选择的图像uitableview单元格

2 个答案: