HarmonyOS 布局超出边界，无法约束住

Flex() {
  Row(){

    Button({ buttonStyle: ButtonStyleMode.NORMAL }) {
      Image($r('app.media.main_top_left_button')).width('100%').height('100%')
    }
    .width(30)
    .height(30)
    .margin({ left: 15 })
    .onClick((event: ClickEvent) => {

    })

    Blank()
    Button({ buttonStyle: ButtonStyleMode.NORMAL }) {
      Image($r('app.media.main_top_left_search'))
    }.margin({ left: 15, right: 15 }).onClick((event: ClickEvent) => {

    })

    Blank()
    Image($r('app.media.main_top_right_button'))
      .width(30)
      .height(30)
      .margin({ right: 15 })
      .onClick((event: ClickEvent) => {
        buildRouterModel(RouterNameConstants.ENTRY_HAP, BuilderNameConstants.WEBVIEW_WEBVIEWPAGE,
          new WebParam(WebURLConstants.KEFU, this.tabBarHiddenClick));
      })
  }.width('100%')

}.width('100%').height(30).margin({ top: 54 })
}.width('100%').height(120)