HarmonyOS 如何获取屏幕宽度或者window宽度

获取window宽度可以通过getWindowProperties去获取当前窗口的属性信息，通过windowRect可以获取窗口的尺寸信息。参考链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-window-V5#getwindowproperties9

获取屏幕宽度参考demo：

import { BusinessError } from '@kit.BasicServicesKit';
import { display } from '@kit.ArkUI';

@Entry
@Component
struct Index {
  getInfo() {
    let displayClass: Array<display.Display> = [];
    display.getAllDisplays((err: BusinessError, data: Array<display.Display>) => {
      let screenWidth: number = data[0].width
      let screenHeight: number = data[0].height
      console.log('width = ' + screenWidth + 'height = ' + screenHeight)
      displayClass = data;
      const errCode: number = err.code;
      if (errCode) {
        console.error('Failed to obtain all the display objects. Code: ${err.code}, message: ${err.message}');
        return;
      }
      console.info('Succeeded in obtaining all the display objects. Data: ' + JSON.stringify(data));
    });
  }

  build() {
    Button('获取当前屏幕宽度').width(100).height(100)
      .onClick(() => {
        this.getInfo()
      })
  }
}
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参考链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-display-V5#displaygetalldisplays9s