如何在Angular 2中再次调用ngOnInit()? [英] How to call ngOnInit() again in Angular 2?

问题描述

请在这段代码中说明，当我调用另一个方法时如何再次调用ngOnInit()?

Please explain in this code, how to call ngOnInit() again when I call another method?

 ngOnInit(): void {
      this.route.params.subscribe((params: Params) => {
        this.model=this.userData;
  });      
 }         

 update() {
        this.loading = true;
        this.userService.update(this.model)
            .subscribe(
                data => {
                    alert ('Update successful');
                },
                error => {
                    alert  ('Not updated');
                    this.loading = false;
                });
                this.user_data();
    }

推荐答案

从我的角度来看，有两个选择:

There are two options from my point of view:

从另一个函数作用域调用ngOnInit().但是我建议不要采用这种方法，因为ngOnInit 是属于OnInit接口的角核方法.

Calling ngOnInit() from another function scope. But I would suggest to do not adopt this approach given ngOnInitis an angular core method that belongs to OnInit Interface.

public ngOnInit() {
      this.route.params.subscribe((params: Params) => {
      this.model=this.userData;
  });      
}

update() {
       this.ngOnInit();
}  

将您的功能分解为另一个功能，使用ngOnInit进行调用，然后，可以通过以下方式调用该功能，从而从任何地方发出任何请求:this.<MethodName>();.

Break your functionality into another function, use ngOnInitto call it and, afterwards, any request can be made from anywhere by calling the function in the following manner: this.<MethodName>();.

public ngOnInit() {
      this.getRouteData();
}

update() {
       this.getRouteData(); 
}

getRouteData() {
  this.route.params.subscribe((params: Params) => {
      this.model=this.userData;
  }); 
}    

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