我正在努力在ScrollView中同时实现TapGesture和LongPressGesture。 .onTapGesture和.onLongPressGesture都可以正常工作,但是我希望当用户点击按钮时,按钮的不透明度会降低,就像普通的Button()一样。
但是,无论出于何种原因,Button()都不能选择长按来执行某项操作。所以我尝试使用.gesture(LongPressGesture()...)。此方法有效并显示了分接头指示。不幸的是,这不适用于ScrollView:您无法再滚动它!
因此,我做了一些研究,发现在LongPressGesture之前必须有一个TapGesture,这样ScrollView才能正常工作。确实是这种情况,但是后来我的LongPressGesture不再起作用。
希望有人有解决方案...
struct ContentView: View {
var body: some View {
ScrollView(.horizontal){
HStack{
ForEach(0..<5){ _ in
Button()
}
}
}
}
}
struct Button: View{
@GestureState var isDetectingLongPress = false
@State var completedLongPress = false
var body: some View{
Circle()
.foregroundColor(.red)
.frame(width: 100, height: 100)
.opacity(self.isDetectingLongPress ? 0 : 1)
// That works, but there is no indication for the user that the UI recognized the gesture
// .onTapGesture {
// print("Tapped!")
// }
// .onLongPressGesture(minimumDuration: 0.5){
// print("Long pressed!")
// }
// The approach (*) shows the press indication, but the ScrollView is stuck because there is no TapGesture
// If I add a dummy TapGesture, the LongPressGesture won't work anymore but now the ScrollView works as expected
//.onTapGesture {}
// (*)
.gesture(LongPressGesture()
.updating(self.$isDetectingLongPress) { currentstate, gestureState,
transaction in
gestureState = currentstate
}
.onEnded { finished in
self.completedLongPress = finished
}
)
}
}
最佳答案
我已经尝试过尝试onTapGesture + LongPressGesture +自定义时间和动画的许多组合,并且几乎/几乎可以完成许多工作,但会带来一些烦恼。这就是我发现的完美方法。在iOS 13.6上测试。
使用此解决方案,您的滚动 View 仍会滚动,您会得到按钮按下动画,长按按钮也可以。
struct MainView: View {
...
Scrollview {
RowView().highPriorityGesture(TapGesture()
.onEnded { _ in
// The function you would expect to call in a button tap here.
})
}
}
struct RowView: View {
@State var longPress = false
var body: some View {
Button(action: {
if (self.longPress) {
self.longPress.toggle()
} else {
// Normal button code here
}
}) {
// Buttons LaF here
}
// RowView code here.
.simultaneousGesture(LongPressGesture(minimumDuration: 0.5)
.onEnded { _ in
self.longPress = true
})
}}
关于ios - 带有点按指示的ScrollView中的SwiftUI TapGesture和LongPressGesture不起作用,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/62733633/