Created
May 14, 2023 14:26
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programmatic scrolling 실험
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import SwiftUI | |
struct ContentView: View { | |
private let target: Int = 100 // ⬅️ 이동할 숫자 | |
var body: some View { | |
ScrollViewReader { proxy in | |
ScrollView { | |
ForEach(1..<200) { num in | |
Text("\(num)") | |
.font(.title) | |
.foregroundColor(num == target ? .red : .gray) | |
.background( | |
RoundedRectangle(cornerRadius: 8) | |
.fill(num == target ? .yellow.opacity(0.5) : .clear) | |
.frame(width: 360) | |
) | |
.id(num) // ⬅️ 이동할 대상에 'id' 를 할당한다 | |
} | |
.frame(maxWidth: .infinity) | |
} | |
.overlay(alignment: .bottomTrailing) { | |
VStack(spacing: 20) { | |
Button { | |
withAnimation { | |
proxy.scrollTo(target, anchor: .top) // ⬅️ anchor 인자를 바꿔가며 실험해보자! | |
} | |
} label: { | |
RoundedRectangle(cornerRadius: 12) | |
.fill(.green.opacity(0.8)) | |
.frame(width: 100, height: 80) | |
.overlay { | |
Text("anchor:\n'top'") | |
.bold() | |
.foregroundColor(.white) | |
} | |
.padding([.bottom, .trailing], 20) | |
} | |
Button { | |
withAnimation { | |
proxy.scrollTo(target, anchor: .center) | |
} | |
} label: { | |
RoundedRectangle(cornerRadius: 12) | |
.fill(.pink.opacity(0.8)) | |
.frame(width: 100, height: 80) | |
.overlay { | |
Text("anchor:\n'center'") | |
.bold() | |
.foregroundColor(.white) | |
} | |
.padding([.bottom, .trailing], 20) | |
} | |
Button { | |
withAnimation { | |
proxy.scrollTo(target, anchor: .bottom) // ⬅️ 맨 아래로 '끌어당기려' 고 함 | |
} | |
} label: { | |
RoundedRectangle(cornerRadius: 12) | |
.fill(.blue.opacity(0.8)) | |
.frame(width: 100, height: 80) | |
.overlay { | |
Text("anchor:\n'bottom'") | |
.bold() | |
.foregroundColor(.white) | |
} | |
.padding([.bottom, .trailing], 20) | |
} | |
} | |
} | |
} | |
} | |
} |
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