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如何让CSS中的重复背景图片更好地展示?

一、选择合适的图片


body {
  background-image: url(image.jpg);
  background-repeat: repeat;
}

首先,在使用背景图片前需要选择一个合适的图片。图片的清晰度和色彩搭配都要考虑到,以确保图片在重复展示时不会出现明显的断裂或颜色冲突现象。

在选择图片时,还需要注意图片的大小。如果图片太小,那么在重复展示时可能会形成明显的断裂线或者令整体效果不美观。因此,正确的使用方法是选取足够大的图片,在展示时进行缩放以适应需要。

我们来看一个例子,在下面的代码中我们使用一张带有线条的图片作为背景图片,并进行了重复展示。


body {
  background-image: url("https://via.placeholder.com/1000x1000/DBDBDB/333333.png?s=50");
  background-repeat: repeat;
}

你可以发现,当图片重复后,出现了很多明显的断裂线。

二、使用平铺模式


body {
  background-image: url(image.jpg);
  background-repeat: repeat;
}

在CSS中,通过设置background-repeat属性可以指定背景图片的重复方式。其中,repeat是平铺模式,会将图片重复展示直至铺满整个区域。

在平铺模式下,背景图片的连贯性会增强,而且一旦区域变化,整个背景图案也会相应地随之调整。

我们可以在前面的例子上,进行如下修改:


body {
  background-image: url("https://via.placeholder.com/1000x1000/DBDBDB/333333.png?s=50");
  background-repeat: repeat;
}

这样,在对网页进行缩放或扩展时,背景图片会随之调整。

三、使用本身就有固定宽度和高度的图片


body {
  background-image: url(image.jpg);
  background-repeat: no-repeat;
  background-size: 100%;
}

使用本身就有固定宽度和高度的图片也是一种不错的选择。这样,在使用重复模式的同时也不会出现模糊或者失真的情况。

我们来看一个例子,在下面的代码中,我们使用了一张尺寸非常小的图片,并将其设置为不进行重复展示。同时,在background-size属性中指定了图片的大小,保证图片在页面上占据完整的宽度。


body {
  background-image: url("https://via.placeholder.com/50x50/DBDBDB/333333.png?s=50");
  background-repeat: no-repeat;
  background-size: 100%;
}

需要注意的是,尽管我们没有开启重复模式,但是仍然需要使用背景图片这个属性来进行设置。

四、使用CSS渐变


body {
  background-image: linear-gradient(to right, #e6b980 0%, #eacda3 100%);
}

另一个解决方案是使用CSS渐变。利用CSS渐变可以制作出具有背景画面的网页,并且在不需重复模式的情况下展示出非常漂亮的效果。

我们来看一个例子,在下面的代码中,我们使用了linear-gradient函数来指定了渐变的方式和颜色。


body {
  background-image: linear-gradient(to right, #e6b980 0%, #eacda3 100%);
}

这样一来,在整个网页的背景中就呈现出了丰富的色彩渐变效果。

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