Mutable array only contains identical items - ios

Question

I am trying to store Json data to a mutable array. The JSON data has "city" and main dictionary branch inside a loop , where main branch contains temperature. When I loop through the main, all the previous temperatures are replaced by the later.
Here's the sample code :
object = [[NSMutableArray alloc]init];
NSURL *url = [NSURL URLWithString:#"http://api.openweathermap.org/data/2.5/forecast/city?q=london,uk&APPID="];
//8a7bc4e5d8246122294adb174b708711
NSData *data = [NSData dataWithContentsOfURL:url];
Model *mod = [[Model alloc]init];
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSDictionary *cityDict = [jsonDict objectForKey:#"city"];
NSString *cityName = [cityDict objectForKey:#"name"];
// NSLog(#"%#",cityName);
NSLog(#"%#",mod.city);
NSMutableArray *arrayOfTemperature = [jsonDict objectForKey:#"list"];
for (NSDictionary *obj in arrayOfTemperature) {
NSDictionary *main = [obj objectForKey:#"main"];
NSString *temp = [main objectForKey:#"temp"];
//NSLog(#"%#",temp);
mod.temp = temp;
[object addObject:mod];
}

Answer 1

You are reusing the same mod instance over and over. You need to create a new one each iteration.
Move the line:
Model *mod = [[Model alloc]init];
to inside the for loop:
NSMutableArray *arrayOfTemperature = [jsonDict objectForKey:#"list"];
for (NSDictionary *obj in arrayOfTemperature) {
Model *mod = [[Model alloc]init];
NSDictionary *main = [obj objectForKey:#"main"];
NSString *temp = [main objectForKey:#"temp"];
//NSLog(#"%#",temp);
mod.temp = temp;
[object addObject:mod];
}