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							- Component({
 -     externalClasses: ['i-class'],
 -     options: {
 -         multipleSlots: true
 -     },
 -     relations : {
 -         '../sticky/index' : {
 -             type : 'parent'
 -         }
 -     },
 -     data : {
 -         top : 0,
 -         height : 0,
 -         isFixed : false,
 -         index : -1,
 -     },
 -     methods: {
 -         updateScrollTopChange(scrollTop){
 -             const data = this.data;
 -             const top = data.top;
 -             const height = data.height;
 -             this.setData({
 -                 isFixed : ( scrollTop >= top && scrollTop < top + height ) ? true : false
 -             })
 -         },
 -         updateDataChange(index) {
 -             const className = '.i-sticky-item';
 -             const query = tt.createSelectorQuery().in(this);
 -             query.select( className ).boundingClientRect((res)=>{
 -                     if( res ){
 -                         this.setData({
 -                             top : res.top,
 -                             height : res.height,
 -                             index : index
 -                         })
 -                     }
 -             }).exec()
 -         }
 -     }
 - })
 
 
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