ionic 3 angular本机屏幕截图因typeError失败

我正在使用

我的代码如下所示：

应用程序模块.ts

import { Screenshot } from '@ionic-native/screenshot';

providers: [
    StatusBar,
    ThemeProvider,
    OpportunityService,
    Screenshot,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

 constructor(public navCtrl: NavController,
              public screenshot: Screenshot) {
                this.showRow = false;
  }

getFeedback(){
       // this.screenshot.save('jpg', 100,'vik.jpg')
       this.screenshot.save('jpg', 80, 'myscreenshot.jpg').then(
            () => alert('got it'),
            (err) => console.log(err)
        );
   }
}

home.ts

import { Screenshot } from '@ionic-native/screenshot';

providers: [
    StatusBar,
    ThemeProvider,
    OpportunityService,
    Screenshot,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

 constructor(public navCtrl: NavController,
              public screenshot: Screenshot) {
                this.showRow = false;
  }

getFeedback(){
       // this.screenshot.save('jpg', 100,'vik.jpg')
       this.screenshot.save('jpg', 80, 'myscreenshot.jpg').then(
            () => alert('got it'),
            (err) => console.log(err)
        );
   }
}

但我看到了错误：

TypeError: Cannot read property 'save' of undefined
    at index.js:54
    at new t (polyfills.js:3)
    at Screenshot.save (index.js:53)
    at 

---

您已将其导入app.module.ts，但是否已将屏幕截图导入home.ts

import { Screenshot } from '@ionic-native/screenshot';

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在较新的版本中，ionic 4+

import { Screenshot } from '@ionic-native/screenshot/ngx';

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注意：这将在真正的设备上工作，而不是在离子服务上。

我觉得它很合适。也许其他人可以帮忙。