angular生命周期

//    angular生命周期 //     ngOnChanges(changes) {//         console.log('ngOnChanges');//     }//     ngOnInit() {//         console.log('ngOnInit');//     }//      ngDoCheck() {//         console.log('ngDoCheck');//     }//     ngOnDestroy() {//         console.log('ngOnDestroy');//     }