属性'平台'已声明但从未使用过

Question

Why I got this warning by tslint?

Package name: io.ionic.starter
[18:37:16]  tslint: s:/IonicProject/VerificheNawi/src/pages/home/home.ts, line: 14
        Property 'platform' is declared but never used.

  L14:    constructor(public navCtrl: NavController, private platform: Platform, public splash: SplashScreen) {
  L15:      platform.ready().then(()  => {

As you can see, L15 use platform... I wonder if there is something I didn't yet understood about injection.

Answer 1

The problem is the line number 14. So try with this:

constructor(platform: Platform, public navCtrl: NavController, public splash: SplashScreen) {

by omitting the private keyword for the platform in the constructor, we're telling Typescript not to create a property for it, in this component.

Why? Since you're using the platform like this: platform.ready... you're not using the property from the component, but the parameter from the constructor .

So as I see it, you could fix that in two ways:

1. Remove the private keyword next to the platform, in the constructor , in order to not create a property in the component, and just use the platform parameter.
2. Change platform.ready().then(...) by this.platform.ready().then(..) to use the property from the component (by using the this keyword).