-
Notifications
You must be signed in to change notification settings - Fork 3
/
practice3.html
81 lines (79 loc) · 3.01 KB
/
practice3.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="referrer" content="no-referrer" />
<title>轮播效果</title>
<style>
* {padding: 0; margin: 0; box-sizing: border-box;}
.banner {overflow: hidden; width: 100%; height: 300px;}
.img-box {position: relative; height: 100%;}
.img-box > img {position: absolute; top: 0; width: 100%; height: 100%;}
</style>
</head>
<body>
<div class="banner">
<div class="img-box">
<img src="http://img2.imgtn.bdimg.com/it/u=234634259,4236876085&fm=26&gp=0.jpg">
<img src="http://www.pptbz.com/pptpic/UploadFiles_6909/201203/2012031220134655.jpg">
<img src="https://img4.duitang.com/uploads/item/201210/06/20121006120433_CZXuC.jpeg">
<img src="http://img2.imgtn.bdimg.com/it/u=234634259,4236876085&fm=26&gp=0.jpg">
<img src="http://www.pptbz.com/pptpic/UploadFiles_6909/201203/2012031220134655.jpg">
</div>
</div>
<script>
+function() {
var imgBox = document.querySelector(".img-box");
var startX = 0;
var endX = 0;
var hadMove = false;
// var width = imgBox.offsetWidth;
var w = window.innerWidth * 0.1
var width = 8 * w;
var height = 4.5 * w;
var index = 0;
var imageOffset = 0; // 当前图片的偏移量
var imageSize = document.querySelectorAll(".img-box > img").length - 2;
document.querySelector(".banner").style.height = height + "px";
document.querySelectorAll(".img-box > img").forEach(function(node, index) {
node.style.width = width + "px";
node.style.left = w + (index - 1) * (width + w / 2) + "px";
})
function toIndex(tIndex) {
if(tIndex === -1) {
index = imageSize - 1;
} else if(tIndex == imageSize) {
index = 0;
} else {
index = tIndex;
}
imageOffset = -index * (width + w / 2);
imgBox.style.webkitTransform = "translate3d(" + (imageOffset) +"px, 0, 0)";
console.log(`tIndex: ${tIndex}, index: ${index}, imageOffset: ${imageOffset}`);
}
imgBox.addEventListener("touchstart", function(e) {
var touched = e.targetTouches[0];
startX = touched.pageX;
}, false);
imgBox.addEventListener("touchend", function(e) {
endX = hadMove ? endX : startX;
var offset = Math.abs(endX - startX);
console.log(`Offset: ${offset}, Width: ${width}`);
if(offset < 0.3 * width) {
toIndex(index);
} else if(startX < endX) {
toIndex(index - 1);
} else {
toIndex(index + 1);
}
}, false);
imgBox.addEventListener("touchmove", function(e) {
var touched = e.targetTouches[0];
hadMove = true;
endX = touched.pageX;
imgBox.style.webkitTransform = "translate3d(" + (imageOffset + endX - startX) +"px, 0, 0)";
}, false);
}();
</script>
</body>
</html>