要素图层标记未在 Esri ios SDK 中显示答案

【问题标题】：Feature layer markers not getting displayed in Esri ios SDK要素图层标记未在 Esri ios SDK 中显示
【发布时间】：2018-10-17 03:14:06
【问题描述】：

我正在使用 ESRI iOS SDK 10.2.5，我的应用程序是使用 swift 2.3 构建的，我现在已将其转换为 3.2，一切正常。

但是在 swift 2.3 中可以正常工作的要素层中显示标记时出现了一点问题

迁移后方法签名略有变化。

这是 2.3 的方法签名（工作正常）：

func featureLayer(featureLayer: AGSFeatureLayer!, operation op: NSOperation!, didQueryFeaturesWithFeatureSet featureSet: AGSFeatureSet!) {

if (featureLayer == self.featureLayer) {

   // featureset has more than 1 element
    for poi in featureSet.features {

        var attr = [String: AnyObject]()
        attr["NAME"] = poi.allAttributes()[LanguageController.localizedString("poi_detail_name")] as? String;
        attr["DETAIL"] = poi.allAttributes()["PHONE_NUMBER"] as? String;
        attr["CATEGORY_EN"] = poi.allAttributes()["FACILITY_CAT_EN"] as? String;
        attr["IS_OFFICE"] = false;
        attr["IS_HDKP"] = false
        let graphic = AGSGraphic(
            geometry: poi.geometry,
            symbol: getSymbolForGraphic(poi as! AGSGraphic),
            attributes: attr)

        self.mapLayer.addGraphic(graphic);
    }

    SVProgressHUD.dismiss()
}

swift 3.2 的方法签名：

func featureLayer(_ featureLayer: AGSFeatureLayer!, operation op: Operation!, didQueryFeaturesWith featureSet: AGSFeatureSet!) {

if (featureLayer == self.featureLayer) {

    // problem here,featureset.feature has 0 elements
    for poi in featureSet.features {

        var attr = [String: Any]()
        attr["NAME"] = (poi as AnyObject).allAttributes()[LanguageController.localizedString("poi_detail_name")] as? String;
        attr["DETAIL"] = (poi as AnyObject).allAttributes()["PHONE_NUMBER"] as? String;
        attr["CATEGORY_EN"] = (poi as AnyObject).allAttributes()["FACILITY_CAT_EN"] as? String;
        attr["IS_OFFICE"] = false as Any
        attr["IS_HDKP"] = false as Any
        let graphic = AGSGraphic(
            geometry: (poi as AnyObject).geometry,
            symbol: getSymbolForGraphic(poi as! AGSGraphic),
            attributes: attr)

        self.mapLayer.addGraphic(graphic);
    }
    SVProgressHUD.dismiss()
}

用于操作特征的模型类：

class POICategory: NSObject, NSCoding
{
var isActive : Bool;
var name : String;
var nameFilter : String;
var key : String;

init(isActive: Bool,name : String, nameFilter: String, key: String){
    self.isActive = isActive;
    self.name = name;
    self.nameFilter = nameFilter;
    self.key = key;
}

required init?(coder aDecoder: NSCoder) {
    self.isActive = aDecoder.decodeObject(forKey: "isActive") as? Bool
    self.name = aDecoder.decodeObject(forKey: "name") as! String
    self.nameFilter = aDecoder.decodeObject(forKey: "nameFilter") as! String
    self.key = aDecoder.decodeObject(forKey: "key") as! String
}

func encode(with aCoder: NSCoder) {
    aCoder.encode(self.isActive, forKey: "isActive")
    aCoder.encode(self.name, forKey: "name")
    aCoder.encode(self.nameFilter, forKey: "nameFilter")
    aCoder.encode(self.key, forKey: "key")

}
}

我调试了代码，发现 featureSet.feature 在 swift 3.2 中没有元素，但在 2.3 中有元素，这就是它没有进入循环并将图形设置为标记的原因

为什么会发生这种情况，因为这个方法来自 esri 的委托..这是他们的错误吗？

如果有人对此有任何想法，请帮助我解决此问题

【问题讨论】：

标签： ios swift esri esri-maps

【解决方案1】：

从 2.3 迁移到 3.2 没有任何问题，根据我的说法，唯一可能破坏的是模型类中的代码

尝试在第二个初始化中更改您的模型类

self.isActive = aDecoder.decodeObject(forKey: "isActive") as? Bool

到

self.isActive = aDecoder.decodeBool(forKey: "isActive")

您正在尝试读取像对象这样的布尔值，这可能是问题

【讨论】：