Question

这是Angular2模板：

<paper-dropdown-menu label="Country">
        <paper-listbox class="dropdown-content" [(ngModel)]="selectedCountry" (ngModelChange)="GetAdmin1s($event)">
            <paper-item *ngFor="let country of countries" value="{{country.Id}}">{{country.Name}}</paper-item>
        </paper-listbox>
    </paper-dropdown-menu>

我收到此错误：

"Template parse errors:
Property binding ngFor not used by any directive on an embedded template (""dropdown-content" [(ngModel)]="selectedCountry" (ngModelChange)="GetAdmin1s($event)">
            [ERROR ->]<paper-item *ngFor="let country of countries" value="{{country.Id}}">{{country.Name}}</paper-item>
 "): LocationComponent@4:12
Property binding ngForCountry not used by any directive on an embedded template (""dropdown-content" [(ngModel)]="selectedCountry" (ngModelChange)="GetAdmin1s($event)">
            [ERROR ->]<paper-item *ngFor="let country of countries" value="{{country.Id}}">{{country.Name}}</paper-item>
 "): LocationComponent@4:12"

国家/地区变量定义为：

public countries: Array<Country> = [];

我使用ngFor有什么问题？为什么要寻找ngForCountry？

Answer 1

var timer: dispatch_source_t! func startTimer() { let queue = dispatch_queue_create("com.domain.app.timer", nil) timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue) dispatch_source_set_timer(timer, DISPATCH_TIME_NOW, 60 * NSEC_PER_SEC, 1 * NSEC_PER_SEC) // every 60 seconds, with leeway of 1 second dispatch_source_set_event_handler(timer) { // do whatever you want here } dispatch_resume(timer) } func stopTimer() { dispatch_source_cancel(timer) timer = nil }

Just try might help

Answer 2

您可以尝试： * ngFor =＆＃34; #country of countries＆＃34;

Angular2模板解析错误：属性绑定ng对于嵌入式模板上的任何指令都不使用

2 个答案: