Information not being received from server? - iphone

Question

Okay, my problem is very simple. Below is my code that is receiving prices from an API, in my code I want the today current price to be displayed, yesterdays price, and the change in percent from yesterday to today. Unfortunately, only the current price is showing properly, but the yesterday and the percent change just show N/A.
Any help is appreciated!
if (refreshing) return;
refreshing = YES;
UIApplication* app = [UIApplication sharedApplication];
app.networkActivityIndicatorVisible = YES;
//self.priceLabel.text = #"Loading...";
//self.yesterdayLabel.text = #"Loading...";
//self.changeLabel.text = #"Loading...";
[NSURLConnection sendAsynchronousRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:#"https://coinbase.com/api/v1/prices/spot_rate"]] queue:[NSOperationQueue mainQueue] completionHandler:^ (NSURLResponse *req, NSData *recv, NSError *err) {
if (err) {
// report
[self setCurrentPrice:#"N/A"];
refreshing = NO;
return;
}
NSError *newError = nil;
NSDictionary *serial = [NSJSONSerialization JSONObjectWithData:recv options:0 error:&newError];
if (newError) {
// report
[self setCurrentPrice:#"N/A"];
refreshing = NO;
return;
}
NSString *amount = [serial objectForKey:#"amount"];
NSString *price = [NSString stringWithFormat:#"%# %#", amount, [serial objectForKey:#"currency"]];
[self setCurrentPrice:[NSString stringWithFormat:#"%#", price]];
// maybe setup a better method.
float diff = [yesterdaysPrice floatValue];
if (diff == 0.0)
self.differenceInPrices = #"N/A";
else {
float amt = [amount floatValue];
float percentChange = amt/diff;
if ((diff == 0) || (amt == diff))
percentChange = 0.00;
percentChange *= 100.00;
self.differenceInPrices = [NSString stringWithFormat:#"%f%%", percentChange];
}
NSMutableDictionary *saveState = [[[NSUserDefaults standardUserDefaults] objectForKey:#"save"] mutableCopy];
[saveState setObject:price forKey:#"price"];
[saveState setObject:yesterdaysPrice forKey:#"lastCheckedPrice"];
NSDateComponents *compon = [[NSCalendar currentCalendar] components:(NSUndefinedDateComponent) fromDate:[NSDate date]];
[saveState setObject:[NSString stringWithFormat:#"%ld", (usingYesterdaysPrices ? [[saveState objectForKey:#"day"] intValue] : [compon day])] forKey:#"day"];
[[NSUserDefaults standardUserDefaults] setObject:saveState forKey:#"save"];
[[NSUserDefaults standardUserDefaults] synchronize];
self.priceLabel.text =self.currentPrice;
self.yesterdayLabel.text = [NSString stringWithFormat:#"%#", yesterdaysPrice];
self.changeLabel.text = differenceInPrices;
app.networkActivityIndicatorVisible = NO;
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"MM/dd/yyyy"];
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:#"h:mm:ss aa"];
NSDate *now = [[NSDate alloc] init];
NSString *theDate = [dateFormat stringFromDate:now];
NSString *theTime = [timeFormat stringFromDate:now];
lstUpdate.text = [NSString stringWithFormat:#"Updated: %# at %#", theDate, theTime];
refreshing = NO;
}];
I also have this code in my viewDidLoad,
[super viewDidLoad];
refreshing = NO;
NSDictionary *save = [[NSUserDefaults standardUserDefaults] objectForKey:#"save"];
if (save) {
int timeStamp = [[save objectForKey:#"day"] intValue];
NSDateComponents *compon = [[NSCalendar currentCalendar] components:(NSUndefinedDateComponent) fromDate:[NSDate date]];
if ([compon day] != timeStamp) {
usingYesterdaysPrices = YES;
yesterdaysPrice = [save objectForKey:#"lastCheckedPrice"];
if (!yesterdaysPrice) {
yesterdaysPrice = #"N/A";
}
}
}
else {
yesterdaysPrice = #"N/A";
}
self.differenceInPrices = #"N/A";
[self sendNewRequest:nil];
[NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:#selector(sendNewRequest:) userInfo:Nil repeats:YES];