打字稿类嵌套json猫
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【中文标题】打字稿类嵌套json猫【英文标题】:Typescript class nested json cat 【发布时间】:2018-06-25 12:52:33 【问题描述】:您好,我有嵌套的 json 尝试转换类,但我弄错了。
类:
export class Location
address: String
city: String
country: String
position:
lat:String,
lng:String,
markers:
lat:String,
lng: String,
label:String,
draggable: boolean,
iconUrl: String
我在 angular5 中转换类的 json 代码
placeMarker(pos)
this.service.getGeocode(pos.coords.lat + "," + pos.coords.lng).subscribe(res =>
var resp: any = res;
console.log(resp)
if (resp.results && resp.results.length > 0)
this.location.address = resp.results[0].formatted_address;
this.location.position.lat = resp.results[0].geometry.location.lat;
this.location.position.lng = resp.results[0].geometry.location.lng;
resp.results[0].address_components.forEach(res=>
res.types.forEach(t=>
if (t == "administrative_area_level_1")
this.location.city = res.long_name;
);
);
)
单击angular5中的标记时出现以下错误,我可以设置地址但无法设置this.location.position.lat。
core.js:1350 ERROR TypeError: Cannot set property 'lat' of undefined
at SafeSubscriber.eval [as _next] (carpetfields.component.ts:55)
at SafeSubscriber.__tryOrUnsub (Subscriber.js:239)
at SafeSubscriber.next (Subscriber.js:186)
at Subscriber._next (Subscriber.js:127)
at Subscriber.next (Subscriber.js:91)
at MapSubscriber._next (map.js:85)
at MapSubscriber.Subscriber.next (Subscriber.js:91)
at XMLHttpRequest.onLoad (http.js:1556)
at ZoneDelegate.invokeTask (zone.js:425)
at Object.onInvokeTask (core.js:4620)
【问题讨论】:
【参考方案1】:您正在设置 this.location.address,但没有设置 this.location.position。
您的代码应如下所示:
this.location.address = resp.results[0].formatted_address;
this.location.position =
lat: resp.results[0].geometry.location.lat,
lng: resp.results[0].geometry.location.lng
【讨论】:
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