Set UISwitches by JSON data? - objective-c

Question

I want to set some UISwitches to values pulled in by a HTTP GET request. The request is working. However, since I'm fairly new to iOS programming I don't know how to go from having some JSON data to pulling it apart like in PHP.
This is what I currently have:
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"viewdidload");
self.responseData = [NSMutableData data];
NSURLRequest *request = [NSURLRequest requestWithURL:
[NSURL URLWithString:#"http://www.test.api/setings"]];
NSMutableURLRequest *mutableRequest = [request mutableCopy];
[mutableRequest addValue:_xAuthToken forHTTPHeaderField:#"X-Auth-Token"];
request = [mutableRequest copy];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
[switch1 setOn:1 animated:NO];
[switch2 setOn:1 animated:NO];
[switch3 setOn:1 animated:NO];
[switch4 setOn:1 animated:NO];
[switch5 setOn:1 animated:NO];
[switch6 setOn:1 animated:NO];
[switch7 setOn:0 animated:NO];
[switch8 setOn:1 animated:NO];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
NSLog(#"didReceiveResponse");
[self.responseData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[self.responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(#"didFailWithError");
NSLog([NSString stringWithFormat:#"Connection failed: %#", [error description]]);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSLog(#"connectionDidFinishLoading");
NSLog(#"Succeeded! Received %d bytes of data",[self.responseData length]);
// convert to JSON
NSError *myError = nil;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:self.responseData options:NSJSONReadingMutableLeaves error:&myError];
// show all values
for(id key in res) {
id value = [res objectForKey:key];
NSString *keyAsString = (NSString *)key;
NSString *valueAsString = (NSString *)value;
NSLog(#"key: %#", keyAsString);
NSLog(#"value: %#", valueAsString);
}
// extract specific value...
NSArray *results = [res objectForKey:#"results"];
for (NSDictionary *result in results) {
NSString *icon = [result objectForKey:#"icon"];
NSLog(#"icon: %#", icon);
}
}
- (void)viewDidUnload {
[super viewDidUnload];
}
And this is what it's getting back from the server:
{"data":
{"setting1":"1",
"setting2":"1",
"setting3":"0",
"setting4":"0",
"setting5":"0",
"setting6":"0",
"setting7":"0",
"setting8":"0"}
}

Answer 1

Just convert the 1 or 0 number string to bool value and then set the switch state using it
//Declare this array of switches in your class header file
property(strong,nonatomic)NSArray *switches;
and initialize it in ViewDidLoad method
switches=[NSArray arrayWithObjects:switch1,switch2,switch3,switch4,switch5,switch6,switch7,switch8,nil];
// and in your - (void)connectionDidFinishLoading:(NSURLConnection *)connection method
NSError *myError = nil;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:self.responseData options:NSJSONReadingMutableLeaves error:&myError];
//get the array of settings and values from the data Object in your json
NSDictionary *switchValues=[res objectForKey:#"data"];
// show all values
NSUInteger *switchIndex=0;
//iterate and convert the value to bool and set the switch state using that value
for(id key in switchValues) {
id value = [switchValues objectForKey:key];
NSString *keyAsString = (NSString *)key;
NSString *valueAsString = (NSString *)value;
[[switches objectAtIndex:switchIndex] setOn:[valueAsString boolValue] animated:NO];
NSLog(#"key: %#", keyAsString);
NSLog(#"value: %#", valueAsString);
switchIndex++;
}