angualr的radio/checkbox

checkBox复选框通过设置ng-true-value='yes'或者ng-false-value='no'来设置选中时的值（即ng-model），默认是ture和false。ng-model的值为ng-true/false-value对应的值

注意，此如果明确指定ng-true-value='true'，则选中时候的值（即ng-model）是字符串的'true'，不是bool的true

radio单选框，通过指定value的值与no-model的值相同来设置选中状态，当二者相等时，该radio被选中；如果多个radio为一组，则要设置相同的name，相同的ng-model ，ng-model的值为选中的那个radio的value

此外ng-checked="expression" 当expression返回true时，也能选中checkbox和radio

示例数据：
[{
    "id": "layerGroupNo0",
    "name": "基础底图",
    "type": "baseMap",
    "selectedMode": "single",
    "selectedId": "vectorBaseMap",
    "layers": [{
        "id": "vectorBaseMap",
        "name": "矢量底图",
        "url": "http://192.168.110.218:6080/arcgis/rest/services/CQVector/MapServer"
    }, {
        "id": "imageBaseMap",
        "name": "影像底图",
        "url": "http://192.168.110.218:6080/arcgis/rest/services/CQImage/MapServer"
    }, {
        "id": "vectoryBaseMap",
        "name": "晕眩底图",
        "url": "http://www.digitalcq.com/RemoteRest/services/CQMap_DEM/MapServer"
    }]
}, {
    "id": "layerGroupNo1",
    "name": "专题图",
    "type": "bizMap",
    "selectedMode": "multiple",
    "selected": false,
    "layers": [{
        "id": "layerGroupNo1-item1",
        "name": "layerGroupNo1-item1",
        "selected": true,
        "url": "http://192.168.110.218:6080/arcgis/rest/services/CQboundary/MapServer/0"
    }, {
        "id": "layerGroupNo1-item2",
        "name": "layerGroupNo1-item2",
        "selected": false,
        "url": "http://192.168.110.218:6080/arcgis/rest/services/CQboundary/MapServer/1"
    }, {
        "id": "layerGroupNo1-item3",
        "name": "layerGroupNo1-item3",
        "selected": false,
        "url": "http://192.168.110.218:6080/arcgis/rest/services/CQboundary/MapServer/2"
    }]
}]

单选框：

     矢量底图
     影像底图
     晕眩底图

复选框：

    layerGroupNo1-item1
    layerGroupNo1-item2
    layerGroupNo1-item3

```