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SwiftUI-NavigationView - 宋明的博客
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<h1 class="title">
SwiftUI-NavigationView
</h1>
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<a href="http://apolla.cc">宋明</a>
<span style="color: #ccc;">|</span>
<span class="date"><i class="fa fa-calendar-check-o" aria-hidden="true"></i> 2023/03/18</span>
<span class="tran-posted-in">posted in</span>
<span class="posted-in"><a href='SwiftUI.html'><i class="fa fa-folder" aria-hidden="true"></i> SwiftUI</a></span>
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<article class="markdown-body single-content">
<p>NavigationView 为我们提供了页面导航<br />
NavigationLink 提供跳转功能</p>
<h2><a id="%E5%9F%BA%E6%9C%AC%E7%94%A8%E6%B3%95" class="anchor" aria-hidden="true"><span class="octicon octicon-link"></span></a>基本用法</h2>
<pre class="line-numbers"><code class="language-swift">
import SwiftUI
struct cellModel:Identifiable {
var id = UUID()
var name:String
var desc:String
}
struct cell: View {
var model:cellModel
var body: some View {
VStack (alignment: .leading) {
Text(model.name)
.fontWeight(.bold)
.padding(10)
Text(model.desc)
}
}
}
struct ContentView: View {
var cells = [cellModel(name: "1", desc: "111"),
cellModel(name: "2", desc: "22222222222222"),
cellModel(name: "3", desc: "33333333"),
cellModel(name: "4", desc: "4444")
]
var body: some View {
NavigationView {
List(cells) { item in
NavigationLink {
detailView(text: item.desc)
.navigationBarTitle("Detail",displayMode: .inline)
} label: {
cell(model: item)
}
}
.listStyle(.plain)
.navigationBarTitle("导航栏",displayMode: .inline)
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
</code></pre>
<h2><a id="%E8%AE%BE%E7%BD%AE%E5%AD%97%E4%BD%93%E9%A2%9C%E8%89%B2%E6%9B%B4%E6%8D%A2%E8%BF%94%E5%9B%9E%E6%8C%89%E9%92%AE%E5%9B%BE%E7%89%87" class="anchor" aria-hidden="true"><span class="octicon octicon-link"></span></a>设置字体颜色 更换返回按钮图片</h2>
<p>在ContentView 内实现init方法</p>
<pre class="line-numbers"><code class="language-swift">struct ContentView: View {
var cells = [cellModel(name: "1", desc: "111"),
cellModel(name: "2", desc: "22222222222222"),
cellModel(name: "3", desc: "33333333"),
cellModel(name: "4", desc: "4444")
]
var body: some View {
NavigationView {
List(cells) { item in
NavigationLink {
detailView(text: item.desc)
.navigationBarTitle("Detail",displayMode: .inline)
} label: {
cell(model: item)
}
}
.listStyle(.plain)
.navigationBarTitle("导航栏",displayMode: .inline)
}
}
init() {
//修改导航栏文字颜色
let navBarAppearance = UINavigationBarAppearance()
navBarAppearance.largeTitleTextAttributes = [.foregroundColor: UIColor.red, .font: UIFont(name: "ArialRoundedMTBold", size: 35)!]
navBarAppearance.titleTextAttributes = [.foregroundColor: UIColor.red, .font: UIFont(name: "ArialRoundedMTBold", size: 20)!]
//修改按钮图片
navBarAppearance.setBackIndicatorImage(UIImage(systemName: "arrow.turn.up.left"), transitionMaskImage: UIImage(systemName: "arrow.turn.up.left"))
//修改渲染颜色 Xcode14.2 未生效
UINavigationBar.appearance().tintColor = .black
UINavigationBar.appearance().standardAppearance = navBarAppearance
UINavigationBar.appearance().scrollEdgeAppearance = navBarAppearance
UINavigationBar.appearance().compactAppearance = navBarAppearance
}
}
</code></pre>
<h2><a id="%E8%87%AA%E5%AE%9A%E4%B9%89%E8%BF%94%E5%9B%9E%E6%8C%89%E9%92%AE" class="anchor" aria-hidden="true"><span class="octicon octicon-link"></span></a>自定义返回按钮</h2>
<p>1.navigationBarBackButtonHidden() 隐藏导航栏<br />
2.navigationBarItems 自定义按钮</p>
<pre class="line-numbers"><code class="language-swift">import SwiftUI
struct detailView: View {
@Environment(\.dismiss) var dismiss
var text:String = ""
var body: some View {
Text(text)
.navigationBarBackButtonHidden()
.navigationBarItems(leading: Button(action: {
dismiss()
}, label: {
HStack{
Text("\(Image(systemName: "chevron.left")) \(text)")
.foregroundColor(.black)
}
}))
}
}
struct detailView_Previews: PreviewProvider {
static var previews: some View {
detailView()
}
}
</code></pre>
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