ionic3解决多个ion-content push pop动画效果问题（含有侧边栏）

//都是在原有基础上添加下面
import {ViewController} from 'ionic-angular';

constructor(private viewCtrl: ViewController) {
　　this.patchViewControllerContent(this.viewCtrl);
}

patchViewControllerContent(viewCtrl: ViewController) {
  const _setIONContent = viewCtrl._setIONContent;
  viewCtrl._setIONContent = (...args) => {
    if (!viewCtrl.getIONContent()) {
      _setIONContent.apply(viewCtrl, args);
    }
  };

  const _setIONContentRef = viewCtrl._setIONContentRef;
  viewCtrl._setIONContentRef = (...args) => {
    if (!viewCtrl.getIONContentRef()) {
      _setIONContentRef.apply(viewCtrl, args);
    }
  };
}