Appending two components in a single component in UIPickerView - ios

Question

I had very minute problem since yesterday. I had 2 tables in the database one with Projects and other with Benefits. I want to add the two tables data in Single PickerView Component. For example Projects has pro1, proj2, proj3 and Benefits table has benefits1, benefits2. So I want to append both projects table dat and Benefits table data in a single PickerView component.
-(void)loadprojects
{
NSString *post =[[NSString alloc] initWithFormat:#"username=%#",[self.projectpicker dataSource]];
// Code for Project loading
NSString * BenefitString =#"http://test.com/GetBenefitTypes";
NSURL *Benefiturl = [NSURL URLWithString:BenefitString];
NSString *projecturltemp = #"http://test.com/GetAssignedProjects";
NSString *str = [[NSUserDefaults standardUserDefaults] valueForKey:#"UserLoginIdSession"];
NSString *usrid = str;
NSString * projecturl =[NSString stringWithFormat:#"%#/%#",projecturltemp,usrid];
NSURL *url = [NSURL URLWithString:projecturl];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%lu", (unsigned long)[postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:Benefiturl];
[request setURL:url];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/projectpicker" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/jsonArray" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSError *error = [[NSError alloc] init];
NSHTTPURLResponse *response = nil;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url
cachePolicy:NSURLRequestReturnCacheDataElseLoad
timeoutInterval:30];
NSURLRequest *urlRequestBenifits = [NSURLRequest requestWithURL:Benefiturl
cachePolicy:NSURLRequestReturnCacheDataElseLoad
timeoutInterval:30];
// Make synchronous request
urlData = [NSURLConnection sendSynchronousRequest:urlRequest
returningResponse:&response
error:&error];
urlData = [NSURLConnection sendSynchronousRequest:urlRequestBenifits
returningResponse:&response
error:&error];
if ([response statusCode] >= 200 && [response statusCode] < 300)
{
NSString *responseData = [NSJSONSerialization JSONObjectWithData:urlData
options:NSJSONReadingAllowFragments error:&error];
NSArray *entries = [NSJSONSerialization JSONObjectWithData:[responseData dataUsingEncoding:NSUTF8StringEncoding]
options:0 error:&error];
if(!entries)
{
NSLog(#"Error : %#", error);
}
else{
for (NSDictionary *entry in entries) {
projID = [entries valueForKey:#"ID_PROJECT"];
projectNames = [entries valueForKey:#"NM_PROJECT"];
BenefitsNames = [entries valueForKey:#"NM_LEAVES"];
}
//Combined = [BenefitsNames arrayByAddingObjectsFromArray:projectNames];
NSLog(#"Combined : %#", projectNames);
//NSLog(#"projID : %#", projID);
_projectpicker.delegate = self;
_projectpicker.dataSource = self;
}
} else {
}
}

Answer 1

Are projects and benefits NSArray instances? If so why not just combine them into one array and use that moving forward?
NSArray *projects = #[#"pro 1", #"pro 2"];
NSArray *benefits = #[#"benefit 1", #"benefit 2"];
NSArray *combined = [projects arrayByAddingObjectsFromArray:benefits];
NSLog(#"Combined: %#", combined);
Combined prints out:
Combined: (
"pro 1",
"pro 2",
"benefit 1",
"benefit 2" )
Then in your - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component method just return the [combined objectAtIndex:row];

Answer 2

base on my understanding, you wanna have something like above? am i correct? so multiple component in a UIPickerView?
if so, 1st thing, you need to set delegations to your ViewController ->
<UIPickerViewDataSource, UIPickerViewDelegate>
then you implement the following methods in your ViewController.m file:
(I assume you have "NSArray *data" for projects and benefits ready...)
//Number of rows to display in each component
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
if (component==0) {
return [self.listOfProjectsOfLeftCol count];
}
return [self.listOfBenefitsOfRightCol count];
}
//Number of columns to display
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 2;
}
//define what to display in each rows and columns
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
if (component==0) {
return [self.listOfProjectsLeftCol objectAtIndex:row];
}
return [self.listOfBenefitsOfRightCol objectAtIndex:row];
}
//when the row is selected , do something...
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (component==0) {
//selected items in left column, now write your own code to do something...
}
else {
//selected items in right column, now write your own code to do something...
}
}

Answer 3

Not clear what do you mean by the combine the two component into one.
But I guess you want combination of project and benefit as Project:Benefit
If so u can use following code snippet
NSArray *arrProject=[NSArray arrayWithObjects:#"Project1",#"Project2",nil];
NSArray *arrBenefits=[NSArray arrayWithObjects:#"Benefits1",#"Benefits2",nil];
NSMutableArray *arrCombined=[[NSMutableArray alloc]init];
for(int i=0;i<[arrProject count];i++)
{
[arrCombined addObject:[NSString stringWithFormat:#"%#:%#",[arrProject objectAtIndex:i],[arrBenefits objectAtIndex:i]]];
}
NSLog(#"Combined:%#",arrCombined);
Its gives you result as
Combined:(
"Project1:Benefits1",
"Project2:Benefits2"
)
And then use the arrCombined for the date picker data source