how to get data for Two json urls in iOS - ios

Question

I know only getting data for Json.But i need how to getting data for two json url.
i have two Urls and two MutableArrays.Ever time i can handle only one url like this :-
NSURL * url=[NSURL URLWithString:#" url"];
NSURLRequest *req=[NSURLRequest requestWithURL:url];
connection=[NSURLConnection connectionWithRequest:req delegate:self];
if(connection)
{
NSLog(#"Connected");
webData=[[NSMutableData alloc]init];
NSLog(#"Connected2");
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component
{
return arrayfirst.count;
}
- (NSString *)pickerView:(UIPickerView *)pickerView
titleForRow:(NSInteger)row
forComponent:(NSInteger)component
{
return arrayfirst[row];
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row
inComponent:(NSInteger)component
{
one.text = arrayfirst[row];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSMutableArray *al=[NSJSONSerialization JSONObjectWithData:webData options:0 error:nil];
NSLog(#"the array is %#",al);
for(NSArray *arr in al)
{
[arrayfirst addObject:[arr objectAtIndex:1]];
}
}
Please give me any idea about how to handle two Json url. I have two urls BusinessCategory and BusinessLocation I have two MutableArrays arrayfirst and arraysecond. I know about BusinessCategory data pass to arrayfirst. But I don't know how to handle.

Answer 1

You have to create two NSURL connection and handle the response in the delegate.
So, in your header file you can have:
NSURLConnection *conn1;
NSURLConnection *conn2;
NSMutableArray *arrayFirst;
NSMutableArray *arraySecond;
In the implementation file:
//Connection 1
NSURL *url1=[NSURL URLWithString:#"yourjsonurl1"];
NSURLRequest *request1 = [NSURLRequest requestWithURL:url1];
conn1=[[NSURLConnection alloc] initWithRequest:request1 delegate:self];
//Connection 2
NSURL *url2=[NSURL URLWithString:#"yourjsonurl2"];
NSURLRequest *request2 = [NSURLRequest requestWithURL:url2];
conn2=[[NSURLConnection alloc] initWithRequest:request2 delegate:self];
//In your delegate
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
if (connection==conn1) {
arrayFirst = [[NSMutableData alloc]init];
}
else if (connection==conn2){
arraySecond = [[NSMutableData alloc]init];
}
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
if (connection==conn1) {
[arrayFirst appendData:data];
}
else if (connection==conn2){
[arraySecond appendData:data];
}
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
if (connection==conn1) {
NSLog(#"SOMETHING WENT WRONG WITH URL1");
}
else if (connection==conn2){
NSLog(#"SOMETHING WENT WRONG WITH URL2");
}
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{
if (connection==conn1) {
NSLog(#"DONE WITH URL1");
}
else if (connection==conn2){
NSLog(#"DONE WITH URL2");
}
}
A shorter (and maybe, better) way of doing this is to run it in an asynchronous operation:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSData *result = [NSData dataWithContentsOfURL:"yourURL"];
id jsonResult;
if ([result length] != 0) { jsonResult = [NSJSONSerialization JSONObjectWithData:result options:0 error:nil];}
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(#"done!");
});
});