Component({
  properties: {
    title: {
      type: String,
      value: '默认标题'
    },
    height: {
      type: String,
      value: 100,
      observer: '_setHeight'
    }
  },
  data: {
    style: ''
  },
  methods: {
    _setHeight: function(val) {
      this.setData({
        style: `height: ${val}rpx;line-height: ${val}rpx;`
      });
    }
  }
});