srcoll modify

src/components/search/search-result.js

@@ -78,8 +78,16 @@ class SearchResult extends PureComponent {
     handleScroll = throttle(() => {
         let y = window.scrollY, 
             headY = this.searchHead.current.offsetTop;
+        console.log(headY,'headY');
+        console.log(document.querySelector('body').offsetHeight);
+        // 向上滑动
         if (y < this.prevScrollY && y > 0) {
+            console.log(0);
+            console.log(this.state.swipeDirection);
+
             if (this.state.swipeDirection === this.swipeDown) {
+        console.log(1);
+
                 y <= headY && this.state.searchHeadStyle.position !== 'fixed' && 
                 this.setState({
                     searchHeadStyle: {
@@ -88,19 +96,27 @@ class SearchResult extends PureComponent {
                     }
                 })
             } else {
+        console.log(2);
+
                 this.setState({
                     swipeDirection: this.swipeDown
                 }, () => {
                     if (this.state.swipeDirection === this.swipeDown) {
-                        this.setState({
-                            searchHeadStyle: {
-                                top: `${y > headY ? y - 44 : y}px`
-                            }
-                        })
+                        let h = y > document.querySelector('body').offsetHeight? document.querySelector('body').offsetHeight: y;
+                        let h1 = this.searchHead.current.offsetHeight
+                            this.setState({
+                                searchHeadStyle: {
+                                    // top: `${h > headY ? h - h1 : h}px`
+                                    top: `${y}px`
+                                }
+                            })
+                        
+                        
                     }
                 })
             }
         } else {
+            console.log(3);
             this.state.swipeDirection !== this.swipeUp &&
             this.setState({
                 swipeDirection: this.swipeUp,