用户单击完成按钮后如何更改 UIButton 的图像是 iOS 中的另一个 UIView

问题描述

当用户单击 tableview 上的 UIButton 时(tableview 在每一行中都有多个按钮)，会显示另一个视图.在用户单击另一个 UIView 的完成按钮后，我想更改此按钮的图像.我怎样才能做到这一点?我是新手.你能为我提供一些代码吗?提前致谢.

When the user clicks on a UIButton on tableview ( tableview has mutiple button in each row), another View is shown. I want to change image for this button after the user has clicked on the Done button of the other UIView. How can I do that? I'm a newbie. Could you please provide some code for me? Thanks in advance.

更新代码:

表格视图代码:

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *CellIdentifier = [NSString stringWithFormat:@"%d,%d",indexPath.section,indexPath.row];

    UITableViewCell *cell = [_tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

        UIButton *market = [UIButton buttonWithType:UIButtonTypeCustom];
        [market addTarget:self action:@selector(marketPressedAction:) forControlEvents:UIControlEventTouchDown];

        [market setTag:3000];
        [market setFrame:CGRectMake(200, 6, 30, 30)];
        [cell.contentView addSubview:market];

    }

   for (UIButton *button in [cell subviews]) { // change name of table here
    if ([button isKindOfClass:[UIButton class]]) {
        button.tag = indexPath.row;
        [button setImage:[UIImage imageNamed:@"Marketplace.png"] forState:UIControlStateNormal];
    }
}


    cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
    _tableView.contentInset = UIEdgeInsetsMake(0, 0, 100, 0);

    return cell;
}

打开按钮的代码(用户单击以显示另一个视图的按钮)

Code for Open button ( button that user click on to show another View)

    - (void)marketPressedAction:(id)sender
{

    UIButton *button = (UIButton *)sender;
    buttontag = button.tag;
    NSLog(@"Market button click at row %d",buttontag);
}

完成按钮的代码:

 -(void)submitMarket
{
    for (UIButton *button in [_tableView subviews]) { // change name of table here
        if ([button isKindOfClass:[UIButton class]]) {
            if (button.tag == buttontag) {
                [button setBackgroundImage:[UIImage imageNamed:@"MarketplaceSelect.png"] forState:UIControlStateNormal];
            } 
        } 
    }
}

推荐答案

试试这个:

[yourButton setBackgroundImage:someImge forState:UIControlStateNormal];

按钮点击代码:

 savedTag = button.tag;

完成按钮点击代码:

for (UIButton *button in [table subviews]) { // change name of table here 
  if ([button isKindOfClass:[UIButton class]]) { 
    if (button.tag == savedtag) { 
       [button setBackgroundImage:someImge forState:UIControlStateNormal];
    } 
  } 
}

在 cellForRowAtIndexPath 中代替这个:[market setTag:3000]; 写 [market setTag:indexPath.row];

In cellForRowAtIndexPath in place of this : [market setTag:3000]; write [market setTag:indexPath.row];

试试这个:

替换:

marketButton = (UIButton *)[cell.contentView viewWithTag:3000];
[marketButton setTag:indexPath.row];

有了这个:

for (UIButton *button in [cell subviews]) { // change name of table here
     if ([button isKindOfClass:[UIButton class]]) {
         button.tag == indexPath.row; 
     }
}

还有一件事:将 cellForRowAtIndexPath 的第一行设为:

One more thing : make first line of cellForRowAtIndexPath as :

NSString *CellIdentifier = @"tableCell";

将你的 cellForRowAtIndexPath 更改为:

Change your cellForRowAtIndexPath as :

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *CellIdentifier = @"cell";

    UITableViewCell *cell = [_tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

        UIButton *market = [UIButton buttonWithType:UIButtonTypeCustom];
        [market addTarget:self action:@selector(marketPressedAction:) forControlEvents:UIControlEventTouchDown];

        [market setImage:[UIImage imageNamed:@"Marketplace.png"] forState:UIControlStateNormal];

        [market setTag:indexPath.row];
        [market setFrame:CGRectMake(200, 6, 30, 30)];
        [cell.contentView addSubview:market];

    }

    else {

       for (UIButton *button in [cell subviews]) { // change name of table here
         if ([button isKindOfClass:[UIButton class]]) {
            button.tag = indexPath.row;
         }
    }
}


    cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
    _tableView.contentInset = UIEdgeInsetsMake(0, 0, 100, 0);

    return cell;
}

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