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在我的項目「無限滾動日曆」離子2 ngFor更新數據我用ngFor到interate超過對象使用「管」 mapToIterable。鑑於
不幸的是,我注意到,當我添加新的屬性,對象上的視圖變量被更新,但不ngFor更新列表。 的事情是,當我進入查看它填補了罰款,但是當我向下滾動它成功地從API獲取數據,但不能更新ngFor列表..
我放置代碼zone.run()
沒有成功嘗試解決方法的問題。
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時間的一些代碼:
// mapToIterable.pipe.ts
import { Pipe, PipeTransform } from '@angular/core';
@Pipe({name: 'mapToIterable'})
export class MapToIterablePipe implements PipeTransform {
transform(value): any {
let keys = [];
for (let key in value) {
keys.push({ key: key, value: value[key]});
}
return keys;
}
}
。
// index.ts
export class Appointments {
appointments = {};
current_date = new Date();
top_date: any = new Date(+new Date - 12096e5); // 14 days past
bottom_date: any = new Date(+new Date + 12096e5); // 14 day future
range = {
start_date: this.top_date,
end_date: this.bottom_date
}
generateDays = function (start, end) {
while(start < end) {
start.setDate(start.getDate() + 1);
this.appointments[start.toISOString().slice(0, 10)] = [];
}
};
fillDays = function() {
this.appointmentService.all(this.range).map(res => res.json()).subscribe(
data => {
for (var appointment in data) {
this.appointments[appointment] = data[appointment];
}
},
err => {
console.log(JSON.parse(err._body));
}
);
};
constructor(
public navCtrl: Nav,
public appointmentService: AppointmentService,
) {
var temp_date: any = new Date(this.top_date);
this.generateDays(temp_date, this.bottom_date);
this.fillDays();
}
moreFuture(infiniteScroll) {
setTimeout(() => {
var temp_date: any = new Date(this.bottom_date);
this.bottom_date = new Date(+temp_date + 12096e5); // add 14 days
this.range.start_date = temp_date;
this.range.end_date = this.bottom_date;
this.generateDays(temp_date, this.bottom_date);
this.fillDays();
infiniteScroll.complete();
}, 500);
};
}
。我想用對象而不是數組?
,因爲你使用的是「純管道」的當值或引用它適用於改變執行我將每一個答案:)
謝謝:) 我已經看到了之前,但我沒想到它是如此重要:/ 我試圖修改代碼以使用可觀察和解決方案是如此簡單... – m1l05z
我經歷過同樣的事情。發現它很難:) –