I am rather new to Objective-C development so please be patient!
I am trying to take data from a user & send that information to an external database. I have managed to work out how to push the data rather easily, but the issue is; due to the nature of my application, there is a high probability that the user will have no mobile connectivity while they're using it. How can I continuously check that the user has mobile connectivity, and then send the data when it's connected? My code for the action is below:
(Just to clarify, the action takes 10 readings of signal over 5 seconds, appends them to an array, calculates the average and the updates the location. In turn, the locationManager sends the data to a cloud service including the average signal reading.
- (IBAction)buttonPressed:(id)sender {
// Make Manager Delegate & Set Accuracy
manager.delegate = self;
manager.desiredAccuracy = kCLLocationAccuracyBest;
// Call Timer
myTimer = [NSTimer scheduledTimerWithTimeInterval:0.5
target:self
selector:@selector(arrayBuild)
userInfo:nil
repeats:YES];
// Initialise Array
resultsArray = [[NSMutableArray alloc]init];
}
#pragma mark CLLocationManagerDelegate Methods
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
NSLog(@"Error: %@", error);
NSLog(@"Failed to get location!");
}
-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
NSLog(@"Location: %@",newLocation);
if (curentLocation != nil) {
// Code below uses a third party utility to submit data
PFObject *Object = [PFObject objectWithClassName:@"Issue"];
Object[@"Latitude"] = [NSString stringWithFormat:@"%.8f",curentLocation.coordinate.latitude];
Object[@"Longitude"] = [NSString stringWithFormat:@"%.8f",curentLocation.coordinate.longitude];
Object[@"Signal"] = [NSString stringWithFormat:@"%@",_avgNumber];
[Object saveInBackground];
// Update Text Fields
self.latitude.text = [NSString stringWithFormat:@"%.8f",curentLocation.coordinate.latitude];
self.longitude.text = [NSString stringWithFormat:@"%.8f",curentLocation.coordinate.longitude];
self.signal.text = [NSString stringWithFormat:@"%@",_avgNumber];
}
// Stop the Location Update
[manager stopUpdatingLocation];
}
- (void)arrayBuild {
loopCount++;
if (loopCount >= 11) {
// Find Average
NSNumber *avg = [resultsArray valueForKeyPath:@"@avg.self"];
_avgNumber = avg;
// Change Text of Label to Average & Log
self.signal.text = [NSString stringWithFormat:@"%@",_avgNumber];
NSLog(@"%@",_avgNumber);
// Update Location
[manager startUpdatingLocation];
// Invalidate Timer
[myTimer invalidate];
myTimer = nil;
}else{
// Declare Signal Strength
float signalstrength = CTGetSignalStrength();
// Individual Result & Convert to Integer
NSString *result = [NSString stringWithFormat:@"%f", signalstrength];
NSInteger resultInt = [result integerValue];
// Add Object
[resultsArray addObject:[NSNumber numberWithFloat:resultInt]];
// Change Text of Label Each Second
self.signal.text = [NSString stringWithFormat:@"%d",loopCount];
NSLog(@"%f",signalstrength);
}
}
