ionic3 软键盘上移覆盖底部栏解决

if (platform.is('ios')) {
　　let　　appEl = <HTMLElement>(document.getElementsByTagName('ION-APP')[0]),
　　　　　 appElHeight = appEl.clientHeight;

　　Keyboard.disableScroll(true);

　　window.addEventListener('native.keyboardshow', (e) => {
　　　　appEl.style.height = (appElHeight - (<any>e).keyboardHeight) + 'px';
　　});

　　window.addEventListener('native.keyboardhide', () => {
　　　　appEl.style.height = '100%';
　　});
}

参考：https://github.com/ionic-team/ionic/issues/7149