*注:由于胶囊按钮是原生组件,为表现一直,其单位在个系统都为px,所以我们的自定义导航栏各个高度的单位都必需是px(切记不能用rpx),才能完美适配。
3、解决问题
通过上述分析,相信小伙伴们都能有一个解决问题的思路了,在上代码之前,小灰再给大家画一下重点:
话不多说,上代码(gitHub地址):
js:
Component({
properties: {
background: {
type: String,
value: 'rgba(255, 255, 255, 1)'
},
color: {
type: String,
value: 'rgba(0, 0, 0, 1)'
},
titleText: {
type: String,
value: '导航栏'
},
titleImg: {
type: String,
value: ''
},
backIcon: {
type: String,
value: ''
},
homeIcon: {
type: String,
value: ''
},
fontSize: {
type: Number,
value: 16
},
iconHeight: {
type: Number,
value: 19
},
iconWidth: {
type:Number,
value: 58
}
},
attached: function(){
var that = this;
that.setNavSize();
that.setStyle();
},
data: {
},
methods: {
// 通过获取系统信息计算导航栏高度
setNavSize: function() {
var that = this
, sysinfo = wx.getSystemInfoSync()
, statusHeight = sysinfo.statusBarHeight
, isiOS = sysinfo.system.indexOf('iOS') > -1
, navHeight;
if (!isiOS) {
navHeight = 48;
} else {
navHeight = 44;
}
that.setData({
status: statusHeight,
navHeight: navHeight
})
},
setStyle: function() {
var that = this
, containerStyle
, textStyle
, iconStyle;
containerStyle = [
'background:' + that.data.background
].join(';');
textStyle = [
'color:' + that.data.color,
'font-size:' + that.data.fontSize + 'px'
].join(';');
iconStyle = [
'width: ' + that.data.iconWidth + 'px',
'height: ' + that.data.iconHeight + 'px'
].join(';');
that.setData({
containerStyle: containerStyle,
textStyle: textStyle,
iconStyle: iconStyle
}) },
// 返回事件
back: function(){
wx.navigateBack({
delta: 1
})
this.triggerEvent('back', {back: 1})
},
home: function() {
this.triggerEvent('home', {});
}
}})
wxml:
<view class='nav' style='height: {{status + navHeight}}px'>
<view class='status' style='height: {{status}}px;{{containerStyle}}'></view> <view class='navbar' style='height:{{navHeight}}px;{{containerStyle}}'> <view class='back-icon' wx:if="{{backIcon}}" bindtap='back'> <image src='{{backIcon}}'></image>
</view>
<view class='home-icon' wx:if="{{homeIcon}}" bindtap='home'>
<image src='{{homeIcon}}'></image>
</view> [链接描述][10]
<view class='nav-icon' wx:if="{{titleImg}}">
<image src='{{titleImg}}' style='{{iconStyle}}'></image>
</view>
<view class='nav-title' wx:if="{{titleText && !titleImg}}">
<text style='{{textStyle}}'>{{titleText}}</text>
</view>
</view>
</view>
wxss:
.navbar{
position: relative
}
.back-icon, .home-icon{
width: 28px;
height: 100%;
position: absolute;
transform: translateY(-50%);
top: 50%;
display: flex;
}
.back-icon{
left: 16px;
}
.home-icon{
left: 44px
}
.back-icon image{
width: 28px;
height: 28px;
margin: auto;
}
.home-icon image{
width: 20px;
height: 20px;
margin: auto;
}
.nav-title, .nav-icon{
position: absolute;
transform: translate(-50%, -50%);
left: 50%;
top: 50%;
font-size: 0;
font-weight: bold;
}
运行效果图:
文字标题:
图片标题:
4、总结
经过小灰的一番论证以及实践经验,最终总结出以上最终解决方案,但希望对小伙伴们有所帮助,如果小伙伴们觉得有用,记得给颗star哦 --> 点我,后续还会更新其他组件。
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