Display the selected value in uipickerview - ios

Question

I had a uipickerview in my detailed page. I want to get the value selected by default when I edit the respective record which comes from my tableviewcell. In short I had a tableview with 10 records. When I select a record from tableview cell it navigates to detailed page which contains three picker views with one component each. I want the picker view to load the selected value by default. Here is the below code how Iam loading the data. How can I display the selected value in -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row and one more thing is I am using UINavigationcontroller for this page? Guys Can u please help me out
-(void)loadprojects
{
NSString *post =[[NSString alloc] initWithFormat:#"username=%#",[self.projectpicker dataSource]];
//NSString *pickername = [self.projectpicker dataSource];
//NSString *key = #"Da9s^a2Rp4na6R$ikiAsav3Is#niWsa";
//NSString *encrypteduname = [AESCrypt encrypt:pickername password:key];
// Code for Project loading
NSString *projecturltemp = #"http://xxx.xxx/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: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];
// Make synchronous request
urlData = [NSURLConnection sendSynchronousRequest:urlRequest
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"];
}
randomSelection=[BenefitNames arrayByAddingObjectsFromArray:projectNames];
randomSelectionID = [benID arrayByAddingObjectsFromArray:projID];
_projectpicker.delegate = self;
_projectpicker.dataSource = self;
}
} else {
}
}
-(void)loaddata
{
NSString *eventDate = self.projidstocancel;
[[NSUserDefaults standardUserDefaults] setObject:eventDate forKey:#"Eventdate"];
[[NSUserDefaults standardUserDefaults] synchronize];
NSString *post =[[NSString alloc] initWithFormat:#"username : %#&Password :%#",[self.projectpicker dataSource],[self.projectpicker delegate]];
//NSString *pickername = [self.projectpicker dataSource];
//NSString *key = #"Da9s^a2Rp4na6R$ikiAsav3Is#niWsa";
//NSString *encrypteduname = [AESCrypt encrypt:pickername password:key];
// Code for Project loading
NSString *projecturltemp = #"http://xxx.xxxx/GetDetailsByID";
NSString *str = [[NSUserDefaults standardUserDefaults] valueForKey:#"UserLoginIdSession"];
NSString *usrid = str;
NSString * projecturl =[NSString stringWithFormat:#"%#/%#",projecturltemp,self.hdnRowcount];
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: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];
// Make synchronous request
urlData = [NSURLConnection sendSynchronousRequest:urlRequest
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) {
projectNames = [entries valueForKey:#"NM_PROJECT"];
taskNames = [entries valueForKey:#"TASk_NAME"];
subtaskNames = [entries valueForKey:#"SUBTASK_NAME"];
hdnlblProjects.text = [[entries valueForKey:#"NM_PROJECT"]componentsJoinedByString:#""];
hdnlblTasks.text = [[entries valueForKey:#"TASk_NAME"]componentsJoinedByString:#""];
hdnlblSubTasks.text = [[entries valueForKey:#"SUBTASK_NAME"]componentsJoinedByString:#""];
txthours.text = [[entries valueForKey:#"No_Hours"]componentsJoinedByString:#""];
txtstatus.text = [[entries valueForKey:#"STATUS"]componentsJoinedByString:#""];
lblBenefitsLeaves.text = [[entries valueForKey:#"NM_LEAVE"]componentsJoinedByString:#""];
BenefitNames = [entries valueForKey:#"NM_LEAVE"];
projID = [entries valueForKey:#"ID_PROJECT"];
taskID = [entries valueForKey:#"ID_TASK"];
subtskID = [entries valueForKey:#"ID_SUB_TASK"];
}
lblProjects.text = [[projID valueForKey:#"description"] componentsJoinedByString:#""];
taskstring = [[taskID valueForKey:#"description"] componentsJoinedByString:#""];
subtaskstring = [[subtskID valueForKey:#"description"] componentsJoinedByString:#""];
bentest = [[BenefitNames valueForKey:#"description"] componentsJoinedByString:#""];
hrsdiff1 = [txthours.text floatValue];
}
} else {
}
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
int numberofRows = 0;
if([pickerView isEqual: _projectpicker]){
numberofRows = [randomSelection count];
return numberofRows;
}
else if([pickerView isEqual: _taskspicker]){
numberofRows = [taskNames count];
return numberofRows;
}
else if([pickerView isEqual: _subtaskspicker]){
numberofRows = [subtaskNames count];
return numberofRows;
}
}
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *title = #"Test";
if([pickerView isEqual: _projectpicker]){
title = [randomSelection objectAtIndex:row];
return title;
}
else if ([pickerView isEqual: _taskspicker]){
title = [taskNames objectAtIndex:row];
return title;
}
else if ([pickerView isEqual: _subtaskspicker]){
title = [subtaskNames objectAtIndex:row];
return title;
}
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
//NSLog(#"%#",myArrayString);
//NSLog(#"%#",myTaskArrayString);
if([pickerView isEqual: _projectpicker]){
NSNumber *myProjectArrayString = [randomSelectionID objectAtIndex:row];
lblProjects.text = [NSString stringWithFormat:#"%#",myProjectArrayString];
lblProjects.hidden = YES;
lblBenefitsLeaves.text = [randomSelection objectAtIndex:row];
hdnlblProjects.text = [randomSelection objectAtIndex:row];
rownoedit = row;
lblTasks.text = #"0";
hdnlblTasks.text = #"--Select--";
lblSubTasks.text = #"0";
hdnlblSubTasks.text = #"--Select--";
[self loadtasks];
}
//lblProjects.hidden = YES;
else if([pickerView isEqual: _taskspicker])
{
NSNumber *myTaskArrayString = [taskID objectAtIndex:row];
lblTasks.text = [NSString stringWithFormat:#"%#",myTaskArrayString];
lblTasks.hidden = YES;
hdnlblTasks.text = [taskNames objectAtIndex:row];
lblSubTasks.text = #"0";
hdnlblSubTasks.text = #"--Select--";
[self loadsubtasks];
}
else if([pickerView isEqual: _subtaskspicker])
{
NSNumber *mysubtaskArrayString = [subtskID objectAtIndex:row];
lblSubTasks.text = [NSString stringWithFormat:#"%#",mysubtaskArrayString];
lblSubTasks.hidden = YES;
hdnlblSubTasks.text = [subtaskNames objectAtIndex:row];
//lblTasks.text = [taskNames objectAtIndex:[pickerView selectedRowInComponent:1]];
//lblTasks.text = [NSString stringWithFormat:#"%#", myTaskArrayString];
//lblSubTasks.text = [subtaskNames objectAtIndex:[pickerView selectedRowInComponent:2]];
}
}

Answer 1

First define a static variable and give it initial value you like to first on load
ex : static int selectedRow = 3
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:
(NSInteger)row inComponent:(NSInteger)component{
selectedRow = [pickerView selectedRowInComponent:0];
}
and then where you show pickerView place this line
[self selectRow:selectedRow inComponent:0 animated:YES];

Answer 2

Try with following code
[self.yourPickerViewName selectRow:self.valueName inComponent:0 animated:YES];
Where
self.valueName is value that select record from tableview cell. and Put above code after creation of your UIPickerView.

Answer 3

You can refer this to fetch selected value from pickerview
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if([pickerView isEqual:StatePicker])
{
stateName = [StateArray objectAtIndex:row]; //StateName is NSString, StateArray is Array
}
}