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uniapp设置页面背景颜色详解

uniapp是一个基于Vue.js的开发框架,可以开发跨平台应用程序,如H5、小程序、APP等。页面背景是一个页面的基本元素之一,合适的背景颜色可以使页面更具吸引力和可读性。在uniapp中,设置页面背景色是一个必须掌握的技能。本文将从以下几个方面对uniapp设置页面背景颜色进行详解。

一、设置背景色

<template>
  <view style="background-color:#ffffff">
    <text>这是一段页面内容</text>
  </view>
</template>

在模板中给一个标签设置背景色即可,如上代码中,在view标签中加入style属性,将background-color设置为需要的颜色值,这里设置为白色(#ffffff)。如果需要设置其他颜色,可以在网上搜寻颜色代码。

二、使用CSS设置背景色

<template>
  <view class="bgColor">
    <text>这是一段页面内容</text>
  </view>
</template>

<style>
  .bgColor{
    background-color: #ff0000;
  }
</style>

使用CSS给页面设置背景色,可以将CSS样式写在单独的文件中,或者写在<style>标签中。如上代码中,将背景色的CSS样式写在<style>标签中,通过class名称bgColor来调用。这里设置背景色为红色(#ff0000)。

三、设置背景图片

<template>
  <view style="background-image: url('/static/bg.jpg')">
    <text>这是一段页面内容</text>
  </view>
</template>

将图片文件放在uniapp工程的static文件夹下,即可使用其中的图片。在上代码中,通过给view标签添加style属性,将background-image属性设置为需要的背景图片路径即可。

四、使用线性渐变设置背景色

<template>
  <view style="background-image: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%); height:100vh;">
    <text>这是一段页面内容</text>
  </view>
</template>

线性渐变是指背景颜色从一种颜色逐渐转变为另一种颜色的一种渐变方式。在上代码中,通过给view标签添加style属性,将background-image属性设置为线性渐变,设置颜色过渡和方向即可。这里设置从左上角往右下角变化,并使用两种颜色进行过渡。

五、设置动态背景

<template>
  <view :style="'background-color:' + bgColor">
    <text>这是一段页面内容</text>
    <button @click="changeBgColor">改变背景颜色</button>
  </view>
</template>

<script>
  export default {
    data(){
      return{
        bgColor: '#ffffff'
      }
    },
    methods:{
      changeBgColor(){
        let r = Math.floor(Math.random()*256)//生成随机数0-255的整数
        let g = Math.floor(Math.random()*256)
        let b = Math.floor(Math.random()*256)
        this.bgColor = `rgb(${r},${g},${b})` //将生成的颜色值赋值给bgColor
      }
    }
  }
</script>

通过在Vue组件中使用data属性,可以将产生的随机颜色值绑定到页面的background-color属性中,实现动态背景效果。在上代码中,首先将bgColor数据属性设置为白色,然后在changeBgColor方法中生成随机的rgb值,将生成的颜色值字符串赋值给bgColor,使组件重新渲染,达到改变背景颜色的效果。在组件模板中,通过v-bind将bgColor绑定到background-color属性中,即可实现动态背景效果。

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when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${item.id} [in template "article/detail/index.ftl" at line 48, column 106] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:481) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:401) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:370) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:371) at freemarker.core.IteratorBlock$IterationContext.executedNestedContentForCollOrSeqListing(IteratorBlock.java:321) at freemarker.core.IteratorBlock$IterationContext.executeNestedContent(IteratorBlock.java:271) at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:244) at freemarker.core.Environment.visitIteratorBlock(Environment.java:645) at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:108) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:94) at freemarker.core.Environment.visit(Environment.java:335) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.Environment.process(Environment.java:314) at freemarker.template.Template.process(Template.java:383) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:332) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:266) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:220) at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:181) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:314) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1431) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1167) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1106) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at com.software.filter.HttpSpiderIdentifyFilter.doFilter(HttpSpiderIdentifyFilter.java:51) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at java.base/java.lang.VirtualThread.run(VirtualThread.java:309)