Hi Afroz,
After examining this feature service, I found that a large amount of time was consumed by loading the geometry of each feature. If you don't need the geometry in the UITableView, consider the following
queryParams.returnGeometry = false
By setting the query parameter's returnGeometry to false, it will not load the geometry for the feature, which saves big amount of time. Per my test, with this line added, the query takes about 1 second. While it normally takes 5 seconds to fully load.
The full code looks like below. Note that I added a clock to measure the time elapsed for the query.
private func queryMunicipality() {
let begin = clock()
print("clock begins")
let queryParams = AGSQueryParameters()
queryParams.whereClause = "1=1"
queryParams.returnGeometry = false
featureTable.populateFromService(
with: queryParams,
clearCache: true,
outFields: ["*"]
) { [weak self] (queryResult: AGSFeatureQueryResult?, error: Error?) in
guard let self else { return }
// For measuring time
let diff = Double(clock() - begin) / Double(CLOCKS_PER_SEC)
print("Time elapsed", diff)
if let error {
print(error.localizedDescription)
} else if let features = queryResult?.featureEnumerator().allObjects,
!features.isEmpty {
for feature in features {
let featureDict = [
"CODE": feature.attributes.value(forKey: "CODE") as! String,
"ENAME": feature.attributes.value(forKey: "ENAME") as! String,
"ANAME": feature.attributes.value(forKey: "ANAME") as! String
]
print("Attr: \(featureDict)")
}
}
}
