<ion-searchbar (ionInput)="getItems($event)" (ionFocus)="focusInput()" (ionBlur)="blurInput()"
(ionClear)="cancel($event)"></ion-searchbar>
ionInput 监听 input 输入框的变化;
ionFocus 当 input 框获取焦点时触发;
ionBlur 当 input 框失去焦点时触发;
ionClear 当点击清除按钮时触发;
来源: https://www.2cto.com/kf/201806/751377.html