React开发（189）:ant design textarea允许清除allowClear

   <div style={{ margin: '10px 0' }}>
            <span style={{ marginRight: '50px' }}>调整原因</span>
            <span>
              <TextArea
                style={{ width: '55%' }}
                placeholder="请输入调整原因"
                value={balancchangereason}
                formatter={(value) => `￥ ${value}`.replace
(/\B(?=(\d{3})+(?!\d))/g, ',')}
                parser={(value) => value.replace(/\￥\s?|(,*)/g, '')}
                allowClear
                onChange={this.handlebalancchangereason}
              />
            </span>