我有一个问题,真的希望有人可以帮助我。
JSFiddle:https://jsfiddle.net/EstSiim/zjqptg9j/3/
HTML:
<div id="wrapper">
<div id="content">
</div>
</div>
<br><br><br>
<button id="btn">Zoom to view</button>
CSS:
#wrapper {
width: 500px;
height: 500px;
border: 1px solid black;
overflow: hidden;
position: relative;
}
#content {
width: 700px;
height: 300px;
background-color: blue;
}
JavaScript的:
var myScroll = new IScroll('#wrapper', {
mouseWheel: true,
keyBindings: true,
wheelAction: 'zoom',
scrollbars: true,
scrollX: true,
scrollY: true,
zoomMin: 0.1,
zoom: true,
mouseWheelSpeed: 20,
});
var zoomFactor = 0.4; //need to calculate this somehow
$('#btn').on('click', function() {
myScroll.zoom(myScroll.scale - zoomFactor);
});
基本上我想要的是iScroll(https://github.com/cubiq/iscroll)缩小所以它的所有内容都显示出来。问题是它的内容大小不固定(可以是700x300,2000x3000,200x900等)。
感谢您的时间
答案 0 :(得分:0)
使用此方法,如果我理解你想要重置内容,我在两个维度(宽度与高度)上实现了这个,如果你只需要其中一个修改拟合因子来返回维度的确切百分比(没有最大值)只需选择一个返回),摆弄here:
//get wrapper dimensions
var wrap = {
H : $('#wrapper').height(),
W : $('#wrapper').width()
}
//get content dimensions
var content = {
H : $('#content').height(),
W : $('#content').width(),
};
var myScroll = new IScroll('#wrapper', {
mouseWheel: true,
keyBindings: true,
wheelAction: 'zoom',
scrollbars: true,
scrollX: true,
scrollY: true,
zoomMin: 0.1,
zoom: true,
mouseWheelSpeed: 20,
});
//compute reset zoom factor
var fitFactor = function ()
{
//compute witch dimension is larger width vs height
h = content.H / wrap.H;//zoom factor for height
w = content.W/ wrap.W;//zoom factor for width
//get max between zoom factores, remove percents
renderedFactor = Math.max(h, w);
//return scale factor
return 1/renderedFactor;
};
$('#btn').on('click', function() {
myScroll.zoom(fitFactor());
});