[英]How to create a radio button in table view
我在表格視圖單元格中有一個單選按鈕。 這是我的單選按鈕
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"myCell"];
if(cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"myCell"];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
radiobtn = [UIButton buttonWithType:UIButtonTypeCustom];
radiobtn.frame = CGRectMake(30, 0, 15, 14.5);
[radiobtn setImage:[UIImage imageNamed:@"unselect"] forState:UIControlStateNormal];
[radiobtn setImage:[UIImage imageNamed:@"select"] forState:UIControlStateSelected];
[radiobtn addTarget:self action:@selector(radiobtn:) forControlEvents:UIControlEventTouchUpInside];
cell.accessoryView = radiobtn;
}
cell.textLabel.text = [array objectAtIndex:indexPath.row];
return cell;
}
-(void)radiobtn:(id)sender
{
if([sender isSelected])
{
[sender setSelected:NO];
} else
[sender setSelected:YES];
} }
在上述編碼中,單選按鈕未更改為選定狀態。 請幫我編碼。
創建按鈕時,將圖像設置為選擇狀態和未選擇狀態。
radiobtn = [UIButton buttonWithType:UIButtonTypeCustom];
radiobtn.frame = CGRectMake(30, 0, 15, 14.5);
[radiobtn setImage:[UIImage imageNamed:@"unselect"]] forState:UIControlStateNormal];
[radiobtn setImage:[UIImage imageNamed:@"select"]] forState:UIControlStateSelected];
radiobtn.tag=1;
[radiobtn addTarget:self action:@selector(radiobtn:) forControlEvents:UIControlEventTouchUpInside];
cell.accessoryView = radiobtn;
單擊按鈕時,只需更改所選狀態。
-(void)radiobtn:(UIButton *)sender
{
if([sender isSelected])
{
[sender setSelected:NO];
}
else
{
[sender setSelected:YES];
}
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"myCell"];
if(cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"myCell"];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
UIButton *newRadioButton;
newRadioButton = [UIButton buttonWithType:UIButtonTypeCustom];
newRadioButton.frame = CGRectMake(30, 0, 15, 14.5);
[newRadioButton setImage:[UIImage imageNamed:@"unselect"] forState:UIControlStateNormal];
[newRadioButton setImage:[UIImage imageNamed:@"select"] forState:UIControlStateSelected];
[newRadioButton addTarget:self action:@selector(radiobtn:) forControlEvents:UIControlEventTouchUpInside];
cell.accessoryView = newRadioButton;
cell.textLabel.text = [array objectAtIndex:indexPath.row];
return cell;
}
cellForRowAtIndexPath
方法中)。 通過使用setImage:forState:
您實際上並沒有更改當前的控件圖像,您只是說控件針對該狀態發生的某些控件狀態使用了精確的圖像。 如果selected
狀態更合適,請不要使用highlighted
狀態。 嘗試通過[radiobtn setSelected:YES]
或[radiobtn setSelected:!radiobtn.isSelected]
以編程方式更改狀態。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.