Hello,
I'm storing an offline map using the the method AGSOfflineMappTak.defaultGenerateOfflineMapParameters, into a .geodatabase file.
When I load it using the method displayLayersFromGeodatabase , it doesn't return any error. Map layers and graphics are loaded and showed, but the map itself (the base map) isn't showed.
I attach the screen at the moment of store the map, and later when I try to load it.
What is the problem?
This is the code I'm using to store the offline map:
private func downloadOfflineMap(with offlineArea: AGSGeometry, at downloadDirectory: URL) {
var urlDatabase = ""
guard let map = mapView.map else { return }
offlineMapTask = AGSOfflineMapTask(onlineMap: map)
offlineMapTask?.defaultGenerateOfflineMapParameters(withAreaOfInterest: offlineArea) { [weak self] parameters, error in
guard let self = self else { return }
guard let offlineMapTask = self.offlineMapTask else { return }
if let parameters = parameters {
parameters.updateMode = .noUpdates
parameters.esriVectorTilesDownloadOption = .useReducedFontsService
let job = offlineMapTask.generateOfflineMapJob(with: parameters, downloadDirectory: downloadDirectory)
(self.navigationItem.titleView as! UIProgressView).observedProgress = job.progress
var n = 0
job.start(statusHandler: { _ in
while n < job.messages.count {
print("Job message \(n): \(job.messages[n].message)")
let splits = job.messages[n].message.components(separatedBy: " ")
if n == 24 && splits.count >= 12 {
urlDatabase = splits[11]
}
n += 1
}
}, completion: { [weak self] result, error in
guard let self = self else { return }
if let result = result {
self.generateGeodatabase(downloadDirectory: urlDatabase)
} else if let error = error {
print("Error downloading the offline map: \(error)")
return
}
})
self.offlineMapJob = job
} else if let error = error {
print("Error fetching default parameters for the area of interest: \(error.localizedDescription)")
}
}
}
And this is the code for loading the map:
private func generateGeodatabase(downloadDirectory: String) {
if let geoDatabasePath = URL(string: downloadDirectory) {
self.generatedGeodatabase = AGSGeodatabase(fileURL: geoDatabasePath)
self.displayLayersFromGeodatabase()
}
}
private func displayLayersFromGeodatabase() {
guard let generatedGeodatabase = generatedGeodatabase else {
return
}
generatedGeodatabase.load { [weak self] (error) in
guard let self = self else {
return
}
if let error = error {
print(error)
} else {
self.liveMode = false
self.mapView.map?.operationalLayers.removeAllObjects()
AGSLoadObjects(generatedGeodatabase.geodatabaseFeatureTables) { (success) in
if success {
for featureTable in generatedGeodatabase.geodatabaseFeatureTables.reversed() {
// Check if feature table has geometry.
if featureTable.hasGeometry {
let featureLayer = AGSFeatureLayer(featureTable: featureTable)
self.mapView.map?.operationalLayers.add(featureLayer)
}
}
print("Now showing layers from the geodatabase")
}
}
}
}
}
