Swift 如何在父滚动视图之外设置视图动画
我想增加一个圆角矩形的大小,当它被点击时填充屏幕,但它在滚动视图中Swift 如何在父滚动视图之外设置视图动画,swift,swiftui,Swift,Swiftui,我想增加一个圆角矩形的大小,当它被点击时填充屏幕,但它在滚动视图中 struct ReviewView : View { var ratings: [Rating] = [] @State var isZoomed = false var body: some View { return ScrollView { HStack { ForEach(ratings) { rating in
struct ReviewView : View {
var ratings: [Rating] = []
@State var isZoomed = false
var body: some View {
return ScrollView {
HStack {
ForEach(ratings) { rating in
ZStack(alignment: .topLeading) {
RoundedRectangle(cornerRadius: 10)
.foregroundColor(Color.gray.opacity(0.5))
.frame(width: self.isZoomed ? UIScreen.main.bounds.width : 200)
.animation(.spring())
VStack(alignment: .leading) {
Text(String(repeating: "☆", count: 5-rating.rating) + String(repeating: "★", count: rating.rating))
.font(.body)
.frame(minWidth: 0, maxWidth: 150, maxHeight: 40, alignment: .topLeading)
.padding(.top, 5)
Text(rating.ratingTitle)
.font(.callout).bold()
.lineLimit(2)
.multilineTextAlignment(.leading)
.frame(minWidth: 0, maxWidth: 150, minHeight: 0, maxHeight: 45, alignment: .topLeading)
Text(rating.ratingDescription)
.font(.footnote)
.lineLimit(3)
.multilineTextAlignment(.leading)
.frame(minWidth: 0, maxWidth: 150, alignment: .topLeading)
}.padding(.leading, 10)
.padding(.top, 5)
.tapAction { self.isZoomed.toggle() }
}
}
PresentationButton(destination: RatingsView()) {
ZStack {
RoundedRectangle(cornerRadius: 10)
.foregroundColor(Color.gray.opacity(0.5))
.frame(width: 100, height: 150)
Text("View More")
}
}
}.padding()
}
}
}
我的代码的问题是所有的矩形都会扩展。如何获得特定的矩形并将其扩展到滚动视图之外的视图大小
编辑: 我已尝试将
iszomed
属性添加到我的ratings结构中,结果如下:
struct Rating : Identifiable {
let id = UUID()
let ratingTitle, ratingDescription: String
let rating: Int
var isZoomed: Bool = false
}
let ratingsExample = [Rating(ratingTitle: "Great!", ratingDescription: "example", rating: 4), Rating(ratingTitle: "Bad!", ratingDescription: "example", rating: 1)]
struct Rating : Identifiable {
let id: Int
let ratingTitle, ratingDescription: String
let rating: Int
}
let ratingsExample = [Rating(id: 0, ratingTitle: "Good", ratingDescription: "good example", rating: 5), Rating(id: 1, ratingTitle: "bad", ratingDescription: "bad example", rating: 1)]
然后我有一系列的评分如下:
struct Rating : Identifiable {
let id = UUID()
let ratingTitle, ratingDescription: String
let rating: Int
var isZoomed: Bool = false
}
let ratingsExample = [Rating(ratingTitle: "Great!", ratingDescription: "example", rating: 4), Rating(ratingTitle: "Bad!", ratingDescription: "example", rating: 1)]
struct Rating : Identifiable {
let id: Int
let ratingTitle, ratingDescription: String
let rating: Int
}
let ratingsExample = [Rating(id: 0, ratingTitle: "Good", ratingDescription: "good example", rating: 5), Rating(id: 1, ratingTitle: "bad", ratingDescription: "bad example", rating: 1)]
并使用上述数组调用该视图:
ReviewView(ratings: ratingsExample)
如何更改结构的iszomed
属性的值,并使其在更改视图时再次呈现视图,就像状态一样?这可能吗
编辑2: 我已经成功地解决了如何只缩放一个矩形。为此,我将
id
设置为Int
,并在测试数据中按如下顺序排序:
struct Rating : Identifiable {
let id = UUID()
let ratingTitle, ratingDescription: String
let rating: Int
var isZoomed: Bool = false
}
let ratingsExample = [Rating(ratingTitle: "Great!", ratingDescription: "example", rating: 4), Rating(ratingTitle: "Bad!", ratingDescription: "example", rating: 1)]
struct Rating : Identifiable {
let id: Int
let ratingTitle, ratingDescription: String
let rating: Int
}
let ratingsExample = [Rating(id: 0, ratingTitle: "Good", ratingDescription: "good example", rating: 5), Rating(id: 1, ratingTitle: "bad", ratingDescription: "bad example", rating: 1)]
在视图中添加状态变量作为布尔数组:
@State var isZoomed: [Bool]
添加了一个计算当前评级数的函数,将它们作为false
添加到Bool
数组中:
func isZoomedList(ratings: [Rating]) -> [Bool] {
var isZoomed: [Bool] = []
for _ in ratings {
isZoomed.append(false)
}
return isZoomed
}
使用函数调用视图并将其指定为@状态
,然后可以在视图中更改:
ReviewView(ratings: ratingsExample, isZoomed: isZoomedList(ratings: ratingsExample))
现在,.tapAction
只通过指定id
来更改特定的矩形:
.tapAction { self.isZoomed[rating.id].toggle() }
我不确定是否有更好的方法,但效果很好
仍然不起作用的是,矩形仍然只在滚动视图中展开,如下所示:
如何在滚动视图之外的屏幕上延伸?每个矩形都独立于它们的点击。但是您正在对所有矩形使用
isZoomed
State变量。因此,每当你点击一个矩形时,iszomed
被切换,所有矩形都会使用这个iszomed
,因此它们会相应地改变帧。
解决方案是您需要保留一个iszomed
State变量数组,并更新被点击的特定矩形。这将足以扩展唯一的特定矩形
var评级:[Int]=[0,1,2,3]
@状态变量被放大:[Bool]=[false,false,false,false]
var body:一些观点{
滚动视图{
HStack{
ForEach(评级){在
ZStack(对齐:。顶部引导){
圆角转角(拐角半径:10)
.foregroundColor(颜色.绿色)
.frame(宽度:self.iszomed[rating]?UIScreen.main.bounds.width:200,高度:self.iszomed[rating]?UIScreen.main.bounds.height:150)
.edgesIgnoringSafeArea(.all)
.animation(.spring())
}.tapAction{self.iszomed[rating].toggle()}
}
}.padding()
}
关于第二个查询,据我所知(如果我错了,请纠正我),默认情况下,scrollView的框架设置为
UIScreen.main.bounds
(不要忽略安全区域)。您正在将矩形扩展为UIScreen.main.bounds
,这是滚动视图框的边界线每个矩形都独立于它们的点击。但是您正在对所有矩形使用IsZomed
状态变量。因此,每当您点击一个矩形时IsZomed
都会被切换,而这将被禁用所有矩形都使用缩放的
,因此它们将相应地更改帧。
解决方案是您需要保留一个isZoomed
State变量数组,并更新被点击的特定矩形。这将足以扩展唯一的特定矩形
var评级:[Int]=[0,1,2,3]
@状态变量被放大:[Bool]=[false,false,false,false]
var body:一些观点{
滚动视图{
HStack{
ForEach(评级){在
ZStack(对齐:。顶部引导){
圆角转角(拐角半径:10)
.foregroundColor(颜色.绿色)
.frame(宽度:self.iszomed[rating]?UIScreen.main.bounds.width:200,高度:self.iszomed[rating]?UIScreen.main.bounds.height:150)
.edgesIgnoringSafeArea(.all)
.animation(.spring())
}.tapAction{self.iszomed[rating].toggle()}
}
}.padding()
}
关于第二个查询,据我所知(如果我错了,请纠正我),默认情况下,scrollView的框架设置为UIScreen.main.bounds
(不要忽略安全区域)。您正在将矩形扩展为UIScreen.main.bounds
,这是滚动视图框的边界线