HarmonyOS swiper组件样式

可在样式中设置即可，参考如下demo

@Entry
@Component
struct SwiperDemo {
  private swiperController: SwiperController = new SwiperController();

  build() {
    Column({ space: 5 }) {
      Swiper(this.swiperController) {
        Text('0')
          .width(250)
          .height(250)
          .backgroundColor(Color.Gray)
          .textAlign(TextAlign.Center)
          .fontSize(30)
        Text('1')
          .width(250)
          .height(250)
          .backgroundColor(Color.Green)
          .textAlign(TextAlign.Center)
          .fontSize(30)
        Text('2')
          .width(250)
          .height(250)
          .backgroundColor(Color.Pink)
          .textAlign(TextAlign.Center)
          .fontSize(30)
      }
      .indicator(true)
      .margin({right:60})

      Row({ space: 12 }) {
        Button('showNext')
          .onClick(() => {
            this.swiperController.showNext(); // 通过controller切换到后一页
          })
        Button('showPrevious')
          .onClick(() => {
            this.swiperController.showPrevious(); // 通过controller切换到前一页
          })
      }.margin(5)
    }.width('100%')
    .margin({ top: 5 })
  }
}