问题
Assuming I have two Angular 2 components: ComponentA and ComponentB.
I want to be able to navigate from ComponentA to ComponentB and then eventually back to ComponentA, while not having to reinitialize ComponentA.
In the current Angular 2 Router implementation, every time I navigate away from a component, the component gets destroyed and has to be recreated the next time I navigate to it.
I know that I can preserve the state of components by using a Service, but this seems to be more like a workaround than an actual solution to my issue. Is there any way around this?
来源：https://stackoverflow.com/questions/42265893/is-it-possible-to-prevent-the-destruction-of-angular-components-when-navigating