小编Lut*_*rvd的帖子

从CPP参考:

已删除隐式声明的复制赋值运算符类T的隐式声明或默认复制赋值运算符定义为以下任何一种情况下已删除:

T has a non-static data member that is const
T has a non-static data member of a reference type.
T has a non-static data member that cannot be copy-assigned (has deleted, inaccessible, or ambiguous copy assignment operator)
T has direct or virtual base class that cannot be copy-assigned (has deleted, inaccessible, or ambiguous move assignment operator)
T has a user-declared move constructor
T has a user-declared move assignment operator 

那么这告诉我是什么导致删除但不是为什么？任何人都可以解释:

T has a non-static data member of …

我试图绑定：

 @Bindable
public float getRoundInEditAmount()
{
    return roundInEdit.getAmount();
}

@Bindable
public void setRoundInEditAmount(float amount)
{
    roundInEdit.setAmount(amount);
    notifyPropertyChanged(BR.roundInEditAmount);
}

至

 <EditText
            android:layout_width="100dp"
            android:layout_height="50dp"
            android:inputType="numberDecimal"
            android:text="@={`` + weightSet.roundInEditAmount}"
            ></EditText>

但是，在单击EditText时，我会看到一个文本输入而不是数字键盘。如果再次单击此EditText，则会显示数字键盘。如果该字段默认为50.0或其他值，则无法删除这些金额。虽然我可以输入文字，但它确实存在。

还有其他人遇到这种行为的原因是第一次单击时输入的文本是数字输入吗？EditText上的两种方式绑定是否也按我期望的方式工作。我已经编写了自己的Binding和InverseBinding适配器，它们的行为方式相同->第一次单击时是TextInput，然后在第二次单击时是数字键盘，但是您不能删除开头的数字。

如果我在表单中嵌入表单类型集合.我已将allow_add设置为true.如何覆盖原型输出是可能的.假设我想在每个添加的表格中包装表单类型的集合.想想我可以在jquery中使用原型输出,但更愿意从一开始就做到这一点.作为一个例子,我的收藏类型:

class EmailShareType extends AbstractType {

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
       $builder->add("shareName","text",array("label"=>"Recipient Name:"));
       $builder->add("emailName", "email", array("label"=>"Recipient Email:","required" => true));
       $builder->add("emailMessage", "textarea",array("label"=>"Enter email message", "max_length" => "4000"));
    }

    public function getName() 
    {
        return 'emailShare';
    }    
} 

并将生成的原型呈现为:

data-prototype="
<div>
<label class="required">__name__label__</label>
<div id="emailShareCollection_emailShares___name__">
<div>
<label for="emailShareCollection_emailShares___name___shareName" class="required">Recipient Name:</label>
<input type="text" id="emailShareCollection_emailShares___name___shareName" name="emailShareCollection[emailShares][__name__][shareName]" required="required" />
</div>
<div>
<label for="emailShareCollection_emailShares___name___emailName" class="required">Recipient Email:</label>
<input type="email" id="emailShareCollection_emailShares___name___emailName" name="emailShareCollection[emailShares][__name__][emailName]" required="required" />
</div>
<div>
<label for="emailShareCollection_emailShares___name___emailMessage" class="required">Enter email message</label>
<textarea id="emailShareCollection_emailShares___name___emailMessage" name="emailShareCollection[emailShares][__name__][emailMessage]" required="required" maxlength="4000"></textarea>
</div> …