message: fix(Picker): incorrect position when pause momentum
diff: @@ -76,6 +76,10 @@ export default createComponent({
  computed: {
  count() {
  return this.options.length;
  + },
  +
  + baseOffset() {
  + return (this.itemHeight * (this.visibleItemCount - 1)) / 2;
  }
  },
  @@ -85,13 +89,13 @@ export default createComponent({
  if (this.moving) {
  const translateY = getElementTranslateY(this.$refs.wrapper);
  - this.startOffset = Math.min(0, translateY);
  + this.offset = Math.min(0, translateY - this.baseOffset);
  + this.startOffset = this.offset;
  } else {
  this.startOffset = this.offset;
  }
  this.duration = 0;
  - this.moving = false;
  this.transitionEndTrigger = null;
  this.touchStartTime = Date.now();
  this.momentumOffset = this.startOffset;
  @@ -129,11 +133,9 @@ export default createComponent({
  return;
  }
  - if (this.offset !== this.startOffset) {
  - this.duration = DEFAULT_DURATION;
  const index = this.getIndexByOffset(this.offset);
  + this.duration = DEFAULT_DURATION;
  this.setIndex(index, true);
  - }
  },
  onTransitionEnd() {
  @@ -228,12 +230,9 @@ export default createComponent({
  },
  render() {
  - const { itemHeight, visibleItemCount } = this;
  -
  - const baseOffset = (itemHeight * (visibleItemCount - 1)) / 2;
  -
  + const { itemHeight } = this;
  const wrapperStyle = {
  - transform: `translate3d(0, ${this.offset + baseOffset}px, 0)`,
  + transform: `translate3d(0, ${this.offset + this.baseOffset}px, 0)`,
  transitionDuration: `${this.duration}ms`,
  transitionProperty: this.duration ? 'all' : 'none',
  lineHeight: `${itemHeight}px`
  