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在 swiftUI 中自定义修饰器
source link: https://blog.superpung.xyz/custom-modifier/
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在 swiftUI 中自定义修饰器
Posted on
2021-07-13
Views: 17
Symbols count in article:
560
Reading time ≈
1 mins.
学习 swiftUI 的记录。
首先定义结构体，在其中对内容修饰：
struct Watermark: ViewModifier {
var text: String
func body(content: Content) -> some View {
ZStack(alignment: .bottomTrailing) {
content
Text(text)
.font(.caption)
.foregroundColor(.white)
.padding(5)
.background(Color.black)
}
}
}
然后根据此结构体，定义 extension，在其中定义修饰器函数：
extension View {
func watermarked(with text: String) -> some View {
self.modifier(Watermark(text: text))
}
}
最终只需调用 extension 中的函数即可实现：
Color.green
.frame(width: 300, height: 200)
.watermarked(with: "Hacking with Swift")
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