iphone - TableView Custom Cell中添加Radio Button外部无法访问

Question

我在 UITableView 的自定义单元格中添加单选按钮，并在其上调用一个方法来更改其图像或背景图像。我可以设置来自发件人的选定按钮图像，但我想将其他按钮设置到我无法设置的原始位置，因为下面的功能需要看起来像单元格中正确的单选按钮

我在使用此方法获取正确的索引路径时也遇到了问题 - (void) TableRadioButtonSelection:(id)sender;

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

static NSString *RadioIdentifier = @"RadioCellIdentifier";

        RadioBtnCell *myRadiocell = (RadioBtnCell *)[tableView dequeueReusableCellWithIdentifier:RadioIdentifier];
        if(myRadiocell == nil) {
            [[NSBundle mainBundle] loadNibNamed:@"RadioBtnCell" owner:self options:nil];
            myRadiocell = radioCell;

            //[myRadiocell.radioBtn1 setBackgroundImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];
            myRadiocell.radioBtn1.tag = ButtonTag;
            //[myRadiocell.radioBtn2 setBackgroundImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];
             myRadiocell.radioBtn2.tag = ButtonTag1;
            //[myRadiocell.radioBtn3 setBackgroundImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];
             myRadiocell.radioBtn3.tag = ButtonTag2;
            myRadiocell.tag = RadioTag;

            [myRadiocell.radioBtn1 addTarget:self action:@selector(TableRadioButtonSelection:) forControlEvents:UIControlEventTouchUpInside];
            [myRadiocell.radioBtn2 addTarget:self action:@selector(TableRadioButtonSelection:) forControlEvents:UIControlEventTouchUpInside];
            [myRadiocell.radioBtn3 addTarget:self action:@selector(TableRadioButtonSelection:) forControlEvents:UIControlEventTouchUpInside];

            myRadiocell.backgroundView.backgroundColor = [UIColor clearColor];
            self.radioCell = nil;

        }

return  myRadiocell;

}

- (void) TableRadioButtonSelection:(id)sender {

    //RadioBtnCell *buttonCell = (RadioBtnCell*)[[btn superview] superview];

    RadioBtnCell *cell = (RadioBtnCell *)[self.questionTblView viewWithTag:RadioTag];
    UIButton *mybtn = (UIButton *)[cell.contentView viewWithTag:ButtonTag];
    UIButton *mybtn1 = (UIButton *)[cell.contentView viewWithTag:ButtonTag1];
    UIButton *mybtn2 = (UIButton *)[cell.contentView viewWithTag:ButtonTag2];

    [mybtn setBackgroundImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];
    [mybtn1 setBackgroundImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];
    [mybtn2 setBackgroundImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];

     //NSLog(@"%@",[cell subviews]);
    UIView* mysubview = [cell.contentView viewWithTag:ButtonTag]; // Make sure your UITextField really *is* the last object you added.
    UIView* mysubview1 = [cell.contentView viewWithTag:ButtonTag1];
    UIView* mysubview2 = [cell.contentView viewWithTag:ButtonTag2];

   // I am unable to set Image of other buttons apart from sender.

    //for(UIView *item in [mysubview subviews]) {

        if ([mysubview isKindOfClass:[UIButton class]]) {
            UIButton *newBtn = (UIButton*)mysubview;
            UIButton *newBtn1 = (UIButton*)mysubview1;
            UIButton *newBtn2 = (UIButton*)mysubview2;

            NSLog(@"OK %@",newBtn);
            //[newBtn setBackgroundImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];
            [newBtn setImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];
            [newBtn1 setImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];
            [newBtn2 setImage:[UIImage imageNamed:@"radiobtn.png"] forState:UIControlStateNormal];

        }
    //}

    NSIndexPath *indexPath = [self.questionTblView indexPathForCell:cell]; 
    NSLog(@"%d",indexPath.row);

    //  Below code is setting Image of selected Button properly as checked but above code for making button onto original state is not setting button image or background image

    UIButton *btn = (UIButton *)sender;
    [btn setImage:[UIImage imageNamed:@"radiobtn_chk.png"] forState:UIControlStateNormal];
    //[btn setBackgroundImage:[UIImage imageNamed:@"radiobtn_chk.png"] forState:UIControlStateNormal];
}

Answer 1

试着把这一行改成这样；-

RadioBtnCell *cell = (RadioBtnCell *)[self.questionTblView viewWithTag:RadioTag];

to

     RadioBtnCell *cell = (RadioBtnCell *)[self.questionTblView cellForRowAtIndexPath:*indexPathofthecell*];

通过这种方式，您可以访问表格 View 单元格。之后，您可以从单元格内容 View 中获取按钮并进行进一步编码。

假设如果您不知道 indexPath 那么您可以从 TableView 的 rowNumber 创建 indexPath(我认为您已经将表行号存储在 RadioTag 中，如果是，那么您可以将此字段用作参数)。