Compiler SwiftUi view with State value

Question

the swift code below takes care of displaying a view according to a state value defined in the view, if the value is true a print is printed if not true nothing is displayed, now the value (Gotocropview) which is defined state is passed as a binding to another view and then changed to @Bindign, if I comment the line in the ContentView view the code is compiled, while if the line is not commented then the code is executed as the code shown in the contentview, it is generated the error: The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions, what is this due to?

Line of comment:

   /* else if(Gotocropview==true){
                        print("Crop view è true")
                    }*/

Swift Code:

struct ContentView: View {

    @State var Gotocamera:Bool = false
    @State var Gotoeditcamera:Bool = false
    @State var Gotocropview:Bool=false
    @Environment(\.presentationMode) var presentationMode
    


    var body: some View {
        ZStack {
            if (!Gotocamera && !Gotoeditcamera && !Gotocropview) {
                Color(#colorLiteral(red: 0.9682741117, green: 0.9682741117, blue: 0.9682741117, alpha: 1)).edgesIgnoringSafeArea(.all)

                VStack {
                    Header()

                    Search()
                        .padding(.top, 10)
                    Buttons(Gotoeditcamera: $Gotoeditcamera,Gotocropview: $Gotocropview)
                        .padding(.vertical, 20)
                    Cards()
                        .padding(.top, 20)
                    if(Support.getDevice() == DeviceType.ipad) {
                        Tabbar(Gotocamera: $Gotocamera)
                            .padding(.top, 200)
                    }
                    else{
                        if(Device.IS_IPHONE_XS){
                        Tabbar(Gotocamera: $Gotocamera)
                            .offset(y: 20)
                        }
                        else{
                            Tabbar(Gotocamera: $Gotocamera)
                                .offset(y: 60)                        }
                    }
                    
                }
            }
             else if(Gotocamera==true) {
                CameraView()
            }
            else if(Gotoeditcamera==true){
                ChangeEffect()
             }
            else if(Gotocropview==true){
                print("Crop view è true")
            }
        }
    }
}

struct Buttons: View {
    @Binding var Gotoeditcamera:Bool
    @Binding var Gotocropview:Bool
...

}

shingo.nakanishi · Answer 1 · 2021-06-04T00:30:48.053

Since the entire source code is not shown, it is hard to say, but if you just want to remove the error, you can do the following.

let _ = print("Crop view è true")

see: How to print() to Xcode console in SwiftUI?

The minimal code to reproduce your error is below.

import SwiftUI

struct ContentView: View {
    @State var Gotocamera:Bool = false
    @State var Gotoeditcamera:Bool = false
    @State var Gotocropview:Bool=false
    @Environment(\.presentationMode) var presentationMode
    
    var body: some View {
        ZStack {
            if (!Gotocamera && !Gotoeditcamera && !Gotocropview) {
                VStack {
                }
            }
            else if(Gotocamera==true) {
            }
            else if(Gotoeditcamera==true){
            }
            else if(Gotocropview==true){
                print("Crop view è true")
            }
        }
    }
}

The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions

If you change this to the following, the error will disappear.

import SwiftUI

struct ContentView: View {
    @State var Gotocamera:Bool = false
    @State var Gotoeditcamera:Bool = false
    @State var Gotocropview:Bool=false
    @Environment(\.presentationMode) var presentationMode
    
    var body: some View {
        ZStack {
            if (!Gotocamera && !Gotoeditcamera && !Gotocropview) {
                VStack {
                }
            }
            else if(Gotocamera==true) {
            }
            else if(Gotoeditcamera==true){
            }
            else if(Gotocropview==true){
                let _ = print("Crop view è true") // fixed
            }
        }
    }
}

Compiler SwiftUi view with State value

1 Answers1