In my app i making use of uitable to select category from my list. my task is,when ever user click or select a cell he should be able to view the selected cell detail in next view(detail view). and when he select the item in a detail view he should be able to move back in a table view and should be able to see the selected item in a rootivew controller.
i am able to navigate properly from tableview to detail view,but i am not able to show the item which is selected in detail view to rootviewcontroller.
please help me out with this issue.
image one is my rootview controller page.
for example : if user select @"make" he will able to see all the releated category of @"make"
. in a next page(which image2).
image to is my detail page.
and when user select @"abarth" it should be display in a rootview controller page(which is page one).
following is my code of rootview controller page:
- (void)viewDidLoad
{
self.car = [[NSArray alloc]initWithObjects:@"Make",@"Model",@"Price Min",@"Price Max",@"State",nil];
[super viewDidLoad];
}
-(NSInteger) numberOfSectionInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.car count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *TextCellIdentifier = @"Cell";
UITableViewCell *cell =[tableView dequeueReusableCellWithIdentifier:TextCellIdentifier];
if (cell==nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:TextCellIdentifier];
cell.accessoryType = UITableViewCellAccessoryNone;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
cell.textLabel.text = [self.car objectAtIndex:[indexPath row]];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (0 == indexPath.row)
{
NSLog(@"0");
self.detailcontroller.title = @"Make";
}
else if (1 == indexPath.row)
{
NSLog(@"1");
self.detailcontroller.title = @"Model";
}
else if (2 == indexPath.row)
{
NSLog(@"2");
self.detailcontroller.title = @"Price Min";
}
else if (3 == indexPath.row)
{
self.detailcontroller.title = @"Price Max";
}
else if (4 == indexPath.row)
{
NSLog(@"3");
self.detailcontroller.title = @"State";
}
[self.navigationController
pushViewController:self.detailcontroller
animated:YES];
}
following is my detail view page code:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
if ([self.title isEqualToString:@"Make"])
{
detail = [[NSArray alloc]initWithObjects:@"Any Make",@"Abarth",@"AC",@"ADAYER",@"Adelaide",@"ALFA ROMEO",@"ALLARD",@"ALPINE-RENAULT",@"ALVIS",@"ARMSTRONG",
@"ASTON MARTIN",@"AUDI",@"AUSTIN",@"AUSTIN HEALEY",@"Barossa",@"BEDFORD",
@"BENTLEY",@"BERTONE",@"BMW",@"BOLWELL",@"BRISTOL",@"BUICK",@"BULLET",
@"CADILLAC",@"CATERHAM",@"CHERY",@"CHEVROLET",@"CHRYSLER",@"CITROEN",
@"Country Central",@"CSV",@"CUSTOM",@"DAEWOO",@"DAIHATSU",@"DAIMLER",
@"DATSUN",@"DE TOMASO",@"DELOREAN",@"DODGE",@"ELFIN",@"ESSEX",
@"EUNOS",@"EXCALIBUR",@"FERRARI",nil];
if ([self.title isEqualToString:@"Abarth"])
{
detail = [[NSArray alloc]initWithObjects:@"HI", nil];
}
}
else if ([self.title isEqualToString:@"Model"])
{
detail = [[NSArray alloc]initWithObjects:@"Any Model", nil];
}
else if ([self.title isEqualToString:@"Price Min"])
{
detail = [[NSArray alloc]initWithObjects:@"Min",@"$2,500",
@"$5,000",
@"$7,500",
@"$10,000",
@"$15,000",
@"$20,000",
@"$25,000",
@"$30,000",
@"$35,000",
@"$40,000",
@"$45,000",
@"$50,000",
@"$60,000",
@"$70,000",
@"$80,000",
@"$90,000",
@"$100,000",
@"$500,000",
@"$1,000,000",nil];
}
else if ([self.title isEqualToString:@"Price Max"])
{
detail = [[NSArray alloc]initWithObjects:@"Max",
@"$2,500",
@"$5,000",
@"$7,500",
@"$10,000",
@"$15,000",
@"$20,000",
@"$25,000",
@"$30,000",
@"$35,000",
@"$40,000",
@"$45,000",
@"$50,000",
@"$60,000",
@"$70,000",
@"$80,000",
@"$90,000",
@"$100,000",
@"$500,000",
@"$1,000,000",nil];
}
else if ([self.title isEqualToString:@"State"])
{
detail = [[NSArray alloc]initWithObjects:@"Any State",
@"Australian Capital Territory",
@"New South Wales",
@"Northern Territory",
@"Queensland",
@"South Australia",
@"Tasmania",
@"Victoria",
@"Western Australia",nil];
}
[self.tableView reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [detail count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = [detail objectAtIndex:
[indexPath row]];
cell.font = [UIFont systemFontOfSize:14.0];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self.navigationController popViewControllerAnimated:YES];
}
You need to make use of custom delegates. Create a protocol in your detailview and implement it in your rootview.Pass the selected string as parameter to delegate method and from the delegate method, display it in your textfield.
//something like this
@interface detailViewController
// protocol declaration
@protocol myDelegate
@optional
-(void)selectedValueIs:(NSString *)value;
// set it as the property
@property (nonatomic, assign) id<myDelegate> selectedValueDelegate;
// in your implementation class synthesize it and call the delegate method
@implementation detailViewController
@synthesize selectedValueDelegate
// in your didselectRowAtIndex method call this delegate method
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self selectedValueDelegate])selectedValueIs:valueString] ;
[self.navigationController popViewControllerAnimated:YES];
}
@end
// In your rootViewController conform to this protocol and then set the delegate
detailViewCtrlObj.selectedValueDelegate=self;
//Implement the delegate Method
-(void)selectedValueIs:(NSString *)value{
{
// do whatever you want with the value string
}
Abhishek Singh
Hi you will have to do it using protocols and delegate Please see my linkon protocol and delegate
you can also do it by creating a variable in appdelegate , setting its property and accessing it in any other view .
YourAppDelegate *appDelegate = (YourAppDelegate *)[[UIApplication sharedApplication] delegate];
delegate.yourVariable;
来源：https://stackoverflow.com/questions/10578281/how-to-pass-data-back-from-detail-view-controller-to-uitableview