Angular ngOnInit（）属性don'；t upate值

我有两个角度方法来检查角色和权限。如果其中一个条件为true，则该值将分配给组件中的ManagePermission布尔属性。服务中有两种方法：

checkProjectManagePermission(): Observable<boolean> {
    const currentLoggedUser = this.authService.getCurrentLoggedInUser();
    const reqUrl = `${currentLoggedUser.mPortalWebApi}${CONST.ctrlUrl.projects}/check-project-manage-permission`;

    return this.http.get(reqUrl).pipe(
        map((response: any) => response),
        catchError((error) => _throw(error)),
    );
}

checkProjectUserRoles(): Observable<boolean> {
    const currentLoggedUser = this.authService.getCurrentLoggedInUser();
    const reqUrl = `${currentLoggedUser.mPortalWebApi}${CONST.ctrlUrl.projects}/${this.projectId}/check-project-user-roles`;

    return this.http.get(reqUrl).pipe(
        map((response: any) => response),
        catchError((error) => _throw(error)),
    );
}

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我在代码中遗漏了什么？提前谢谢

这是一个异步问题。ngInit在checkProjectManagePermission（）完成之前完成。在ngOnInit中订阅checkProjectManagePermission（）

为确保不会出现内存泄漏，请将checkProjectManagePermission（）分配给一个变量，然后在Ngondestory中对其调用unsubscribe。

试试这个

projectManagePermissions = false;
    
     ngOnInit() {       
        this.showLoader = true;
        this.checkProjectManagePermission();                                       
    }
    
    private checkProjectManagePermission() {
        this.projectManagementService.checkProjectManagePermission()
            .pipe(takeUntil(this.observablesDispose$))
            .subscribe(
                (response) => {              
                    this.projectManagePermissions = response;
                    if (!this.projectManagePermissions)  {       
                            this.checkProjectUserRoles();  
                    }                    
                }
            )
    }
    
    private checkProjectUserRoles() {
        return this.projectManagementService.checkProjectUserRoles()
            .pipe(takeUntil(this.observablesDispose$))
            .subscribe(
                (response) => {                  
                    this.projectManagePermissions = response                
                }
            )
    }

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这仍然不起作用1.我提出了你的建议。我注意到另一个奇怪的事情，当我转到另一个链接并返回时，如果我再次重复或刷新页面，这是一个很好的值，它是false@BytechThis可能会有所帮助

projectManagePermissions = false;
    
     ngOnInit() {       
        this.showLoader = true;
        this.checkProjectManagePermission();                                       
    }
    
    private checkProjectManagePermission() {
        this.projectManagementService.checkProjectManagePermission()
            .pipe(takeUntil(this.observablesDispose$))
            .subscribe(
                (response) => {              
                    this.projectManagePermissions = response;
                    if (!this.projectManagePermissions)  {       
                            this.checkProjectUserRoles();  
                    }                    
                }
            )
    }
    
    private checkProjectUserRoles() {
        return this.projectManagementService.checkProjectUserRoles()
            .pipe(takeUntil(this.observablesDispose$))
            .subscribe(
                (response) => {                  
                    this.projectManagePermissions = response                
                }
            )
    }