我正在开发一个项目,当用户点击图像时图像会放大图像,再次点击图像会缩小图像。如何在代码here
中制作缩小功能function resizeImg (img) {
var scale = 150/100;
var pos = $(img).offset();
var clickX = event.pageX - pos.left;
var clickY = event.pageY - pos.top;
var container = $(img).parent().get(0);
$(img).css({
width: img.width*scale,
height: img.height*scale
});
container.scrollLeft = ($(container).width() / -2 ) + clickX * scale;
container.scrollTop = ($(container).height() / -2 ) + clickY * scale;
}
答案 0 :(得分:2)
你这里不需要很多javascript。只需要一些好的CSS,如下所示:http://jsfiddle.net/95wqh/10/
JS:
$('.image').on('click', function () {
$(this).toggleClass('zoom');
});
的CSS:
#Container {
position:relative;
overflow:auto;
}
.zoom{
-webkit-transform : scale(1.5);
transform: scale(1.5);
}
答案 1 :(得分:2)
尝试查看以下代码是否对您有所帮助。 Demo
编辑:如果你想在同一页面的多张图片上执行此操作。
var zoom = "in";
$('.image').on('click', function () {
this.zoom = (this.zoom == "in") ? "out" : "in";
console.log(this.zoom);
resizeImg(this);
});
function resizeImg (img) {
var scale = 150/100;
var pos = $(img).offset();
var clickX = event.pageX - pos.left;
var clickY = event.pageY - pos.top;
var container = $(img).parent().get(0);
if(img.zoom == "in"){
$(img).css({
width: img.width*scale,
height: img.height*scale
});
}
else if (img.zoom == "out"){
$(img).css({
width: img.width/scale,
height: img.height/scale
});
}
container.scrollLeft = ($(container).width() / -2 ) + clickX * scale;
container.scrollTop = ($(container).height() / -2 ) + clickY * scale;
}
答案 2 :(得分:1)
DEMO Works with multiple images
$('img').attr('zoom', 0);
$('.image').on('click', function () {
resizeImg(this);
});
function resizeImg(img) {
var zoom = $(img).attr('zoom');
if (zoom == 0) {
var scale = 150 / 100;
var pos = $(img).offset();
var clickX = event.pageX - pos.left;
var clickY = event.pageY - pos.top;
var container = $(img).parent().get(0);
$(img).css({
width: img.width * scale,
height: img.height * scale
}).attr('zoom', 1);
container.scrollLeft = ($(container).width() / -2) + clickX * scale;
container.scrollTop = ($(container).height() / -2) + clickY * scale;
}else{
$(img).attr('zoom',0).attr('style','');
}
}
为所有图片设置zoom
属性= 0 - > $('img').attr('zoom', 0);
如果zoom
属性设置为0
,我们将zoom
效果并设置属性zoom=1
其他zoom
属性设置为1
已经缩放,我们设置属性zoom=0
并移除style
属性以使图像恢复正常。
答案 3 :(得分:1)
如果你有多张图片,这也可以帮到你
JSfiddle:http://jsfiddle.net/95wqh/14/
JS代码:
$('.image').on('click', function () {
if (typeof this.toggleZoom === "undefined") this.toggleZoom = false;
this.toggleZoom = !this.toggleZoom;
resizeImg(this);
});
function resizeImg(img) {
var scale = (img.toggleZoom) ? 150 / 100 : 100 / 150;
console.log(scale);
var pos = $(img).offset();
var clickX = event.pageX - pos.left;
var clickY = event.pageY - pos.top;
var container = $(img).parent().get(0);
$(img).css({
width: img.width * scale,
height: img.height * scale
});
container.scrollLeft = ($(container).width() / -2) + clickX * scale;
container.scrollTop = ($(container).height() / -2) + clickY * scale;
}
if (typeof this.toggleZoom === "undefined") this.toggleZoom = false;
this.toggleZoom = !this.toggleZoom;
和
var scale = (img.toggleZoom) ? 150 / 100 : 100 / 150;