ios - 如何在 UITableviewCell 中单击时更改 UIButton 的背景颜色？

Question

我有 UITableviewCell，我在单元格中放置了 4 个按钮。当我单击一个按钮时，我需要将其背景颜色更改为红色。

现在我已经为此编写了代码，当我单击一个按钮时，该按钮的背景颜色没有改变，而不是其他行中的同一个按钮改变了背景颜色。

用例:1.我在 UITableView 中有 10 行，每个单元格包含 4 个按钮，命名为 “好”、“更好”、“最好”、“最差”。

1. 当我点击第一行的“好”按钮时，我希望它的颜色会变成红色。

3.现在，如果我点击第一行的“Good”按钮，那么它在向下滚动时不会改变颜色，但我可以看到第 4 行和第 8 行的“Good”按钮变为红色。
所以我的代码在更改颜色时出现了一些错误。

请检查我的表格 View 代码和按钮点击代码

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 4;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    int sectionCount;
    if(section==0)
    {
        sectionCount=4;
    }else if(section==1){
        sectionCount=4;

    }else if (section==2){
        sectionCount=3;

    }else if(section==3){
        sectionCount=1;

    }
    return sectionCount;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    sharedManager=[Mymanager sharedManager];
        static NSString *CellIdentifier = @"cell";

        cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
        if (cell == nil) {
            cell = [[questioncell alloc] initWithStyle:UITableViewCellStyleValue1
                                       reuseIdentifier:CellIdentifier];
        }

        cell.excellentButton.tag=indexPath.row;
        cell.goodButotn.tag=indexPath.row;
        cell.fineButton.tag=indexPath.row;
        cell.dorrButton.tag=indexPath.row;
    if(indexPath.section==0){
        cell.question.text=[questions objectAtIndex:indexPath.row];
    } else if(indexPath.section==1){
        cell.question.text=[section1 objectAtIndex:indexPath.row];

    }else if(indexPath.section==2){
        cell.question.text=[section2 objectAtIndex:indexPath.row];

    }else if(indexPath.section==3){
        cell.question.text=[section3 objectAtIndex:indexPath.row];

    }
 return cell;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 200;
}

按钮点击代码

- (IBAction)goodButton:(id)sender {

    UIButton *button = (UIButton *)sender; // first, cast the sender to UIButton
    NSInteger row = button.tag; // recover the row
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:row inSection:0];
    NSString *key=[NSString stringWithFormat:@"%ld",(long)indexPath.row];
    [sharedManager.ratingDic setValue:@"Good" forKey:key];
    cell.goodButotn.layer.backgroundColor=[[UIColor colorWithRed:39/255.0 green:174/255.0 blue:96/255.0 alpha:100] CGColor ];

    cell.betterButton.layer.backgroundColor=[[UIColor clearColor] CGColor ];
    cell.bestButton.layer.backgroundColor=[[UIColor clearColor] CGColor ];
    cell.worstButton.layer.backgroundColor=[[UIColor clearColor] CGColor ];



}

请帮我解决这个问题

Answer 1

UIButton *button = (UIButton *)sender; <-- 这已经是您对按钮的引用。我看到有 2 种方法可以做到这一点

创建自定义 UITableViewCell 并实现重置所有颜色和设置正确颜色的方法。这是干净的方式。在这里你可以实现更多的逻辑并始终拥有正确的对应数据。在这里，您的每个按钮都调用一个自己的方法，在那里您还有一个清晰的方法。

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    if( self = [super initWithStyle:style reuseIdentifier:reuseIdentifier] )
    {
        [excellentButton addTarget:self action:@selector(clickedExcellentButton) forControlEvents:UIControlEventTouchDown]; // or TouchUp, how ever you like
        [goodButton addTarget:self action:@selector(clickedGoodButton) forControlEvents:UIControlEventTouchDown];
        [fineButton addTarget:self action:@selector(clickedFineButton) forControlEvents:UIControlEventTouchDown];
        [dorrButton addTarget:self action:@selector(clickedWoButton) forControlEvents:UIControlEventTouchDown];
    }

    return self;
}

-(UIColor *)selectionColor
{
    return [UIColor colorWithRed:39/255.0 green:174/255.0 blue:96/255.0 alpha:100];
}

-(void)resetSelection
{
    excellentButton.backgroundColor = [UIColor clearColor];
    goodButton.backgroundColor = [UIColor clearColor];
    fineButton.backgroundColor = [UIColor clearColor];
    dorrButton.backgroundColor = [UIColor clearColor];
}

-(void)clickedExcellentButton
{
    [self resetSelection];
    excellentButton.backgroundColor = [self selectionColor];
    NSString *key=[NSString stringWithFormat:@"%ld",(long)indexPath.row];
    [sharedManager.ratingDic setValue:@"Excellent" forKey:key]; // if you have your sharedManager object here. If you cannot access it from here, you have to forward it or give the cell a reference to it
}

-(void)clickedGoodButton
{
    [self resetSelection];
    goodButton.backgroundColor = [self selectionColor];
    NSString *key=[NSString stringWithFormat:@"%ld",(long)indexPath.row];
    [sharedManager.ratingDic setValue:@"Good" forKey:key];
}

...

或

- (IBAction)goodButton:(id)sender {

UIButton *button = (UIButton *)sender; // this is the button that was clicked
// [...]
for(UIButton *ctrl in [button.superview subviews]) // button.superview get the view that holds him. Subviews all the others in his layer
{
    if([ctrl isKindOfClass:[UIButton class]])
    {
        ctrl.backgroundColor = [UIColor clearColor];
    }
}
button.backgroundColor = [UIColor colorWithRed:39/255.0 green:174/255.0 blue:96/255.0 alpha:100];