Swift 尝试创建3列可删除按钮的行,但按钮的第一行不可删除
这篇文章是关于。在3列按钮上创建行后,当点击“删除按钮”时,前3个按钮在点击“垃圾”图像时不可删除。但是,可以删除第二行按钮(即tag4)。知道这里出了什么问题吗?所有按钮都应该是可删除的 这是密码Swift 尝试创建3列可删除按钮的行,但按钮的第一行不可删除,swift,button,swiftui,Swift,Button,Swiftui,这篇文章是关于。在3列按钮上创建行后,当点击“删除按钮”时,前3个按钮在点击“垃圾”图像时不可删除。但是,可以删除第二行按钮(即tag4)。知道这里出了什么问题吗?所有按钮都应该是可删除的 这是密码 class SomeData: ObservableObject{ @Published var buttonObjects: [ButtonObject] = [ButtonObject(name: "tag1", isSelected: false),
class SomeData: ObservableObject{
@Published var buttonObjects: [ButtonObject] = [ButtonObject(name: "tag1", isSelected: false),
ButtonObject(name: "tag2", isSelected: false), ButtonObject(name: "tag3", isSelected: false), ButtonObject(name: "tag4", isSelected: false)]
}
struct someData3: View {
@Environment(\.editMode) var mode
@ObservedObject var someData = SomeData()
@State var newButtonTitle = ""
@State var isEdit = false
var body: some View {
NavigationView{
// List{ // VStack
VStack{
// Spacer()
VStack(alignment: .leading){//
ForEach(0..<someData.buttonObjects.count/3+1) { row in // create number of rows
HStack{
ForEach(0..<3) { column in // create 3 columns
self.makeView(row: row, column: column)
// makeView2(row: row, column: column, someData: self.someData, isEdit: self.$isEdit)
}
}
}.id(UUID())
}
HStack{
TextField("Enter new button name", text: $newButtonTitle){
let newObject = ButtonObject(name: self.newButtonTitle, isSelected: false)
self.someData.buttonObjects.append(newObject)
self.newButtonTitle = ""
}
}
Spacer()
HStack{
Text("isEdit is ")
Text(String(self.isEdit))
}
}
.navigationBarItems(leading: Button(action: {self.isEdit.toggle()}){Text("Delete Button")},
trailing: EditButton())
}
}
func makeView(row: Int, column: Int) -> some View{
let ind = row * 3 + column
return Group{
if ind<self.someData.buttonObjects.count {
Button(action: {
self.someData.buttonObjects[ind].isSelected = !self.someData.buttonObjects[ind].isSelected
print("Button pressed! buttonKeyName is: \(self.someData.buttonObjects[ind].name) Index is \(ind)")
print("bool is \(self.someData.buttonObjects[ind].isSelected)")
}) {
Text(self.someData.buttonObjects[ind].name)
}
.buttonStyle(GradientBackgroundStyle(isTapped: self.someData.buttonObjects[ind].isSelected))
.overlay(Group {
if self.isEdit {
ZStack {
Button(action: {self.deleteItem(ind: ind)}) {
Image(systemName: "trash")
.foregroundColor(.red).font(.title)
}.padding(.trailing, 3)
.alignmentGuide(.top) { $0[.bottom] }
}
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topTrailing) //topTrailing
}
}
)
.padding(.bottom, 20)
}
else{
EmptyView()
}
}
}
func deleteItem(ind: Int) {
let name = someData.buttonObjects[ind].name
print(" deleting ind \(ind), key: \(name)")
self.someData.buttonObjects.remove(at: ind)
}
}
class SomeData:ObservableObject{
@已发布的变量ButtonObject:[ButtonObject]=[ButtonObject(名称:“tag1”,isSelected:false),
ButtonObject(名称:“tag2”,isSelected:false),ButtonObject(名称:“tag3”,isSelected:false),ButtonObject(名称:“tag4”,isSelected:false)]
}
结构someData3:视图{
@环境(\.editMode)变量模式
@ObservedObject变量someData=someData()
@State var newButtonTitle=“”
@状态变量isEdit=false
var body:一些观点{
导航视图{
//列表{//VStack
VStack{
//垫片()
VStack(对齐:。前导){//
ForEach(0..可能会出现问题,因为顶部按钮的覆盖与导航视图
标题栏重叠,这将阻止按钮的输入
如果在VStack
中添加一些背景色,您将看到顶部按钮的垃圾按钮实际上位于VStack之外:
NavigationView {
VStack {
...
}
.background(Color.red)
}
解决方案之一是通过删除以下行将垃圾箱图像移近按钮的中间:
.alignmentGuide(.top) { $0[.bottom] }
或者,您可以确保垃圾箱按钮不会与NavigationView
标题栏重叠。例如,您可以在VStack
上方添加一个小空间,以使垃圾箱按钮适合内部:
NavigationView {
VStack {
Spacer()
.frame(height: 10)
VStack {
...
}
}
使用也可以得到相同的结果。填充:
Button(action: { }) {
...
}
.buttonStyle(...)
.overlay(...)
.padding(.top, 20)
谢谢你的提示。我无法删除这一行。alignmentGuide(.top){$0[.bottom]}因为我希望垃圾桶按钮出现在按钮上方一点。我想添加间隔符().frame(高度:10)是个好主意!