ios - 如何使用 UIPickerView 单元添加 UIButton？

Question

我有一个自定义 UIPickView ，在 (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view定制 UIButton点击了，但是不工作，我该怎么办？请帮助我们。谢谢

我的代码:

  - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{
        UIButton *button;
        if (!button) {
            button = [UIButton buttonWithType:UIButtonTypeCustom];
            button.frame = CGRectMake(0, 0, pickerView.bounds.size.width, 44.0);
            [button setTitle:_pickDataArray[row] forState:UIControlStateNormal];
            [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
            [button addTarget:self action:@selector(pickButtonAction:) forControlEvents:UIControlEventTouchUpInside];
            button.tag = 1000 + row;
        }
        return button;
    }

    - (void)pickButtonAction:(UIButton *)button{
        NSLog(@"button.tag = %ld",(long)button.tag);
    }

不需要这个代码

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ }

更新代码:

UIButton *button;
if (view == nil) {
    view = [[UIView alloc]init];
    view.backgroundColor = [UIColor clearColor];
    view.userInteractionEnabled = YES;
    if (!button) {
        button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(0, 0, pickerView.bounds.size.width, 44.0);
        [button setTitle:_pickDataArray[row] forState:UIControlStateNormal];
        [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button addTarget:self action:@selector(pickButtonAction:) forControlEvents:UIControlEventTouchDown];
        button.tag = 1000 + row;
        [view addSubview:button];
    }
}
return view;


- (void)pickButtonAction:(UIButton *)button{
    NSLog(@"button.tag = %ld",(long)button.tag);//always not executed
}

Answer 1

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
     if (view == nil) {
        view = [[UIView alloc] init]; 
        view.backgroundColor = [UIColor blueColor];
        if (!button) {
              button = [UIButton buttonWithType:UIButtonTypeCustom];
              button.frame = CGRectMake(0, 0, pickerView.bounds.size.width, 44.0);
              [button setTitle:_pickDataArray[row] forState:UIControlStateNormal];
              [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
              [button addTarget:self action:@selector(pickButtonAction:) forControlEvents:UIControlEventTouchDown];
              button.tag = 1000 + row;
             [view addSubview:button];
        }
     }

    return view;
}

您只是忘记返回 UIView 并将按钮添加到您的 View 。