尺寸设置

// xxx.ets
@Entry
@Component
struct SizeExample {
  build() {
    Column({ space: 10 }) {
      Text('margin and padding:').fontSize(12).fontColor(0xCCCCCC).width('90%')
      Row() {
        // 宽度80 ,高度80 ,外边距20(蓝色区域），内边距10（白色区域）
        Row() {
          Row().size({ width: '100%', height: '100%' }).backgroundColor(Color.Yellow)
        }
        .width(80)
        .height(80)
        .padding(10)
        .margin(20)
        .backgroundColor(Color.White)
      }.backgroundColor(Color.Blue)

      Text('constraintSize').fontSize(12).fontColor(0xCCCCCC).width('90%')
      Text('this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text.this is a Text')
        .width('90%')
        .constraintSize({ maxWidth: 200 })

      Text('layoutWeight').fontSize(12).fontColor(0xCCCCCC).width('90%')
      // 父容器尺寸确定时，设置了layoutWeight的子元素在主轴布局尺寸按照权重进行分配，忽略本身尺寸设置。
      Row() {
        // 权重1，占主轴剩余空间1/3
        Text('layoutWeight(1)')
          .size({ width: '30%', height: 110 }).backgroundColor(0xFFEFD5).textAlign(TextAlign.Center)
          .layoutWeight(1)
        // 权重2，占主轴剩余空间2/3
        Text('layoutWeight(2)')
          .size({ width: '30%', height: 110 }).backgroundColor(0xF5DEB3).textAlign(TextAlign.Center)
          .layoutWeight(2)
        // 未设置layoutWeight属性，组件按照自身尺寸渲染
        Text('no layoutWeight')
          .size({ width: '30%', height: 110 }).backgroundColor(0xD2B48C).textAlign(TextAlign.Center)
      }.size({ width: '90%', height: 140 }).backgroundColor(0xAFEEEE)
      // calc计算特性
      Text('calc:').fontSize(12).fontColor(0xCCCCCC).width('90%')
      Text('calc test').fontSize(50).fontWeight(FontWeight.Bold).backgroundColor(0xFFFAF0).textAlign(TextAlign.Center)
        .margin('calc(25vp*2)')
        .size({width:'calc(90%)', height:'calc(50vp + 10%)'})
    }.width('100%').margin({ top: 5 })
  }
}