自定义是否能通过容器保存

@Component 
struct ComA { 
  build() { 
    Text("ComA").fontSize(50).fontWeight(FontWeight.Bold) 
  } 
} 
  
@Component 
struct ComB { 
  build() { 
    Text("ComB").fontSize(50).fontWeight(FontWeight.Bold) 
  } 
} 
  
@Component 
struct ComC { 
  build() { 
    Text("ComC").fontSize(50).fontWeight(FontWeight.Bold) 
  } 
} 
  
  
//ifelse逻辑分支写法 
@Builder 
function buildCom(param: string) { 
  if (param == "ComA") { 
    ComA() 
  } else if (param == "ComB") { 
    ComB() 
  } else if (param == "ComC") { 
    ComC() 
  } 
} 
  
@Builder 
function buildComA(){ 
  ComA() 
} 
@Builder 
function buildComB(){ 
  ComB() 
} 
  
@Builder 
function buildComC(){ 
  ComC() 
} 
  
//通过map封装在容器中 
let map:Map<string,WrappedBuilder<[]>> =new Map() 
map.set("ComA",wrapBuilder(buildComA)) 
map.set("ComB",wrapBuilder(buildComB)) 
map.set("ComC",wrapBuilder(buildComC)) 
  
  
  
@Entry 
@Component 
struct Page12 { 
  @State message: string = 'Hello World'; 
  @State arr: string[] = ["ComA", "ComB", "ComC"]; 
  
  build() { 
    Column() { 
      ForEach(this.arr, (item: string) => { 
      //在使用时根据key去取 
      map.get(item)?.builder() 
      }) 
    } 
    .justifyContent(FlexAlign.Center) 
    .width("100%") 
    .height("100%") 
  } 
}
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