Hello fellow developers.
I'm working on adding background tasks to my SwiftUI app and running into some issues.
I have added the capabilities for background modes (fetch and processing) and the correct identifiers in "Permitted background task scheduler identifiers"
When I test the background tasks on my device, it seems to only schedule the first task and ignoring the rest.
I can run the first background task just fine with the command:
e -l objc -- (void)[[BGTaskScheduler sharedScheduler] _simulateLaunchForTaskWithIdentifier:@"spotpricesRefresh"]
But it only works for the first task since no other tasks seem to be scheduled. My code looks as below:
.onChange(of: phase) {
if (phase == .background) {
scheduleSpotpricesRefresh()
scheduleEmissionsRefresh()
scheduleSourcesRefresh()
BGTaskScheduler.shared.getPendingTaskRequests(completionHandler: { request in
print("Pending task requests: \(request)")
})
}
}
.backgroundTask(.appRefresh("spotpricesRefresh")) {
await refreshSpotprices()
}
.backgroundTask(.appRefresh("emissionsRefresh")) {
await refreshEmissions()
}
.backgroundTask(.appRefresh("sourcesRefresh")) {
await refreshSources()
}
func scheduleSpotpricesRefresh() {
let request = BGAppRefreshTaskRequest(identifier: "spotpricesRefresh")
request.earliestBeginDate = Date(timeIntervalSinceNow: 60 * 60)
do {
try BGTaskScheduler.shared.submit(request)
print("Scheduling spotprice refresh task")
}
catch {
print("Could not schedule spotprices refresh: \(error)")
}
}
func scheduleEmissionsRefresh() {
let request = BGAppRefreshTaskRequest(identifier: "emissionsRefresh")
request.earliestBeginDate = Date(timeIntervalSinceNow: 60 * 62)
do {
try BGTaskScheduler.shared.submit(request)
print("Scheduling emissions refresh task")
}
catch {
print("Could not schedule emissions refresh: \(error)")
}
}
func scheduleSourcesRefresh() {
let request = BGAppRefreshTaskRequest(identifier: "sourcesRefresh")
request.earliestBeginDate = Date(timeIntervalSinceNow: 60 * 61)
do {
try BGTaskScheduler.shared.submit(request)
print("Scheduling sources refresh task")
}
catch {
print("Could not schedule sources refresh: \(error)")
}
}
func refreshSpotprices() async {
do {
scheduleSpotpricesRefresh()
...
}
catch {
print("Error occurred refreshing spotprices with error: \(error)")
}
}
func refreshEmissions() async {
do {
scheduleEmissionsRefresh()
...
}
catch {
print("Error occurred refreshing emissions with error: \(error)")
}
}
func refreshSources() async {
do {
scheduleSourcesRefresh()
...
}
catch {
print("Error occurred refreshing sources with error: \(error)")
}
}
Here is the output when debugging the app:
Scheduling spotprice refresh task
Scheduling emissions refresh task
Scheduling sources refresh task
Pending task requests: [<BGAppRefreshTaskRequest: spotpricesRefresh, earliestBeginDate: 2023-11-14 10:24:51 +0000>]
I hope someone can point me in the right direction. Thank you in advance.
Best regards, Casper
