在iPad上，当我以与以下类似的样式呈现导航层次结构时：
NavigationView {
NavigationLink(destination: Text("Hi").actionSheet(isPresented: .constant(true)) { () -> ActionSheet in
ActionSheet(title: Text("welllllll"))
},
tag: true,
selection: $didNavigateToChild) {
Button(action: {
self.didNavigateToChild = true
}) {
Text("Let's go!")
}
}
}
.navigationViewStyle(StackNavigationViewStyle())
在显示弹出框，操作表或工作表时（在本例中为带有文本“ welllllll”的ActionSheet），子视图被关闭了（Text("Hi")），我最终回到Text("Let's go!")。
我一直试图了解所谓的解雇，但我是SwiftUI的新手，而我以前的符号断点使我失望了。
无论出于何种原因，这仅在iPad上发生。在iPhone上显示ActionSheet和Sheet的子NavigationView和 public static void main(String[] args) throws NumberFormatException, IOException {
BufferedReader sum = new BufferedReader(new InputStreamReader(System.in));
double a;
a = Double.parseDouble(sum.readLine());
while(true) {
calcYellow(a, a); break;}
while(true) {
calcRed(a, a); break;}
while(true) {
calcGreen(a, a, a, a); break;}
}
static void calcYellow(double a, double b) {
double a1 = 3.0;
double b1 = 3.5;
for (a=a1+4; a<60; a++);
for (b=b1+4; b<60; b++);
if ((a%3.0==0) || (a%3.5==0));
if ((b%3.0==0) || (b%3.5==0));
System.out.println("Yellow");
}
static void calcRed(double a, double b) {
double a1 = 4.0;
double b1 = 4.5;
for (a=a1+4; a<60; a++);
for (b=b1+4; b<60; b++);
if ((a%4.0==0) && (a%4.5==0));
if ((b%4.0==0) && (b%4.5==0));
System.out.println("Red");
}
static void calcGreen(double a, double b, double c, double d) {
double a1 = 1.0;
double b1 = 1.5;
double c1 = 2.0;
double d1 = 2.5;
for (a=a1+4; a<60; a++);
for (b=b1+4; b<60; b++);
for (c=c1+4; c<60; c++);
for (d=d1+4; d<60; d++);
System.out.println("Green");
}
}
效果很好，而没有任何奇怪的导航副作用。