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  • SwiftUI中多设备运行方法

    https://blog.csdn.net/weixin_42679753/article/details/94465674

    https://www.jianshu.com/p/17fc7929fcbb

    1.方法一

    #if DEBUG

    struct LandmarksList_Previews: PreviewProvider {

        static var previews: some View {

            ForEach(["iPhone SE", "iPhone XS Max"].identified(by: .self)) { deviceName in

                LandmarkList()

                    .previewDevice(PreviewDevice(rawValue: deviceName))

                    .previewDisplayName(deviceName)

                  //.previewLayout(.fixed( 300, height: 70)) 设置view控件大小

            }

            .environmentObject(UserData())

        }

    }

    #endif

    2.方法二

    import SwiftUI
    
    struct WatchLandmarkDetail: View {
        @EnvironmentObject var userData: UserData
        var landmark: Landmark
        
        var landmarkIndex: Int {
            userData.landmarks.firstIndex(where: { $0.id == landmark.id })!
        }
        
        var body: some View {
            ScrollView {
                VStack {
                    CircleImage(image: self.landmark.image.resizable())
                        .scaledToFit()
                    
                    Text(self.landmark.name)
                        .font(.headline)
                        .lineLimit(0)
                    
                    Toggle(isOn:
                    $userData.landmarks[self.landmarkIndex].isFavorite) {
                        Text("Favorite")
                    }
                    
                    Divider()
                    
                    Text(self.landmark.park)
                        .font(.caption)
                        .bold()
                        .lineLimit(0)
                    
                    Text(self.landmark.state)
                        .font(.caption)
                }
                .padding(16)
            }
            //
            .navigationBarTitle("Landmarks")
            //
        }
    }
    
    struct WatchLandmarkDetail_Previews: PreviewProvider {
        static var previews: some View {
            let userData = UserData()
            return Group {
                WatchLandmarkDetail(landmark: userData.landmarks[0]).environmentObject(userData)
                    .previewDevice("Apple Watch Series 4 - 44mm")
                
                WatchLandmarkDetail(landmark: userData.landmarks[1]).environmentObject(userData)
                    .previewDevice("Apple Watch Series 2 - 38mm")
            }
        }
    }
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  • 原文地址:https://www.cnblogs.com/sundaysme/p/11972186.html
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