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无法从函数()中访问我的服务我在else条件中有..我在浏览器终端中得到的是“TypeError:this._hitoService is undefined”。当else条件执行时,我需要使用服务来获取数据。我怎么去解决它?无法从函数访问angular2服务
@Component({
selector: 'app-time-line',
templateUrl: './time-line.component.html',
styleUrls: ['./time-line.component.css'],
providers: [HitoService],
entryComponents: [FormHitoComponent]
})
export class TimeLineComponent implements OnInit, OnChanges {
@Input() calbuscador: String;
nom_cal1: any;
hito1: IHito[];
hito: any;
constructor(private _hitoService: HitoService) { }
ngOnInit() {
}
ngOnChanges(){
if (typeof this.calbuscador === "undefined"){
swal("Atencion!", "Busca un calendario con el buscador del Side Menu", "error")
}
else{
this.nom_cal1 = this.calbuscador;
swal({
title: "Are you sure?",
text: "Se cargara el calendario : " + this.calbuscador,
type: "warning",
showCancelButton: true,
confirmButtonColor: '#DD6B55',
confirmButtonText: 'Yes, I am sure!',
cancelButtonText: "No, cancel it!",
closeOnConfirm: false,
closeOnCancel: false
}, function(isConfirm) {
if (isConfirm) {
swal({
title: 'Cargando timeline!',
text: 'Cargando el Calendario en el Timline con sus hitos!',
type: 'success'
}, function() {
this._hitoService.getHitos()
.subscribe(hito1 =>{
this.hito1 = hito1
console.log(this.hito1); // defined!
console.log("nomcal1" + this.nom_cal1);
if (typeof this.nom_cal1 === "undefined"){
swal("Atencion!", "Busca un calendario con el buscador del Side Menu")
}else{
drawtimeline1_1(this.hito1, this.nom_cal1);
}
});
});
} else {
swal("Cancelled", "No se cargara el Timeline :)", "error");
}
});
}
}
或定义一个变量来看待“这个”出来的功能(例如让_self =这一点。),并使用_self的功能。 –
@OysysasIoannou关于TypeScript的一件大事就是你不必像JavaScript那样做。所以不,不这样做 – PierreDuc
“箭头函数是用于编写JavaScript函数的新ES6语法,它们将节省开发人员的时间并简化函数范围”不是打字稿功能 –