如何实现点击输入框时会拉起软键盘，点击Button时软键盘关闭
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可以通过全局的焦点控制对象FocusController的[clearFocus()](https://developer.huawei.com/consumer/cn/doc/harmonyos-references/arkts-apis-uicontext-focuscontroller#clearfocus12)方法收起软键盘，示例代码如下：

@Entry
@Component
struct ClickBlankHideKeyboard {
  build() {
    Column({ space: 12 }) {
      TextInput({ placeholder: 'Please enter your account' })
        .height(40)
      TextInput({ placeholder: 'Please input a password' })
        .height(40)
      Button('log on').width('100%')
        .onClick(() => {
          this.getUIContext().getFocusController().clearFocus();
        })
    }
  }
}

参考链接：

[代码控制收起软键盘](https://developer.huawei.com/consumer/cn/doc/best-practices/bpta-keyboard-layout-adapt#section19809195110316)