I have find a solution thanks to Gunter! Here is my whole code if it could help anyone:
<div class="form-group">
<label for="options">Options :</label>
<div *ngFor="#option of options; #i = index">
<label>
<input type="checkbox"
name="options"
value="{{option}}"
[checked]="options.indexOf(option) >= 0"
(change)="updateCheckedOptions(option, $event)"/>
{{option}}
</label>
</div>
</div>
以下是我正在使用的3个对象:
options = ['OptionA', 'OptionB', 'OptionC'];
optionsMap = {
OptionA: false,
OptionB: false,
OptionC: false,
};
optionsChecked = [];
And there are 3 useful methods:
1.要启动optionsMap
,请执行以下操作:
initOptionsMap() {
for (var x = 0; x<this.order.options.length; x++) {
this.optionsMap[this.options[x]] = true;
}
}
2. to update the optionsMap
:
updateCheckedOptions(option, event) {
this.optionsMap[option] = event.target.checked;
}
3.在发送POST请求之前,将optionsMap
转换为optionsChecked
并存储在options
中:
updateOptions() {
for(var x in this.optionsMap) {
if(this.optionsMap[x]) {
this.optionsChecked.push(x);
}
}
this.options = this.optionsChecked;
this.optionsChecked = [];
}