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SwiftUI-overlay - 宋明的博客
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<h1 class="title">
SwiftUI-overlay
</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>如果需要将另一个图片或文字分层放置在图片视图之上,SwiftUI提供了overlay修饰器可将一个组件与图片进行重叠</p>
<h3><a id="%E5%9B%BE%E7%89%87%E9%87%8D%E5%8F%A0" class="anchor" aria-hidden="true"><span class="octicon octicon-link"></span></a>图片重叠</h3>
<pre class="line-numbers"><code class="language-swift">Image("paris")
.resizable()
.aspectRatio(contentMode: .fill)
.frame(width: 300)
.clipShape(Circle())
.overlay(
Image(systemName: "heart.fill")
.font(.system(size: 50))
.foregroundColor(.black)
.opacity(0.5)
)
</code></pre>
<p><img src="media/16791176889139/16791179279166.jpg" alt="image.png" /></p>
<h3><a id="%E6%96%87%E5%AD%97%E6%8E%A7%E4%BB%B6%E5%92%8C%E5%9B%BE%E7%89%87%E9%87%8D%E5%90%88" class="anchor" aria-hidden="true"><span class="octicon octicon-link"></span></a>文字控件和图片重合</h3>
<pre class="line-numbers"><code class="language-swift">Image("paris")
.resizable()
.aspectRatio(contentMode: .fit)
.overlay(
Text("If you are lucky enough to have lived in Paris as a young man, then wherever you go for the rest of your life it stays with you, for Paris is a moveable feast.\n\n- Ernest Hemingway")
.fontWeight(.heavy)
.font(.system(.headline, design: .rounded))
.foregroundColor(.white)
.padding()
.background(Color.black)
.cornerRadius(10)
.opacity(0.8)
.padding(),
alignment: .top
)
</code></pre>
<p><img src="media/16791176889139/16791179279217.jpg" alt="image.png" /></p>
<h3><a id="%E5%9B%BE%E7%89%87%E8%A6%86%E7%9B%96%E9%A2%9C%E8%89%B2%E5%9B%BE%E5%B1%82%EF%BC%88%E5%8F%98%E6%9A%97%EF%BC%89" class="anchor" aria-hidden="true"><span class="octicon octicon-link"></span></a>图片覆盖颜色图层（变暗）</h3>
<pre class="line-numbers"><code class="language-swift"> Image("jr9Li_iNaE0")
.resizable()
.aspectRatio(contentMode: .fit)
.overlay(
//矩形组件
// Rectangle()
// .fill(.black.opacity(0.4))
//颜色组件
Color(.black)
.opacity(0.4)
//叠加一层文字
.overlay(
Text("SwiftUI")
.font(.system(size: 40 ,design: .rounded))
.fontWeight(.medium)
.foregroundColor(.white)
.frame(width: 200)
)
)
</code></pre>
<p><img src="media/16791176889139/16791179279261.jpg" alt="image.png" /></p>
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