I'm following closely to this hubpage http://klanguedoc.hubpages.com/hub/iOS-How-To-Display-Detail-Data-from-UITableView-in-Detail-View-Controller and am able to replicate it almost perfectly except the final component. prepareForSegue method.
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([[segue identifier] isEqualToString:@"showDetail"]) {
klViewController *detailViewController = [segue destinationViewController];
detailViewController.treeData = [self.ds objectAtIndex:[self.tableView indexPathForSelectedRow].row];
}
}
I tried to look closely and tried finding other online example of prepareForSegue method but they were all pointing to the same direction, which means the method and code is correct!
The error issued by xcode is ARC Issue - No visible @interface for 'NSString' declares the selector 'isEqualToString:'
Can anyone please point me to the right direction?
P.S correct me if I'm wrong, but should this prepareForSegue method suppose to be in the tableview class? if it's not please let me know, cause I'm new to xcode and the tutorial is abit hazy, hence I'm afraid I miss interpret where the codes are suppose to go.
Many thanks in advance :)
EDIT:
SampleData.h
#import <Foundation/Foundation.h>
@interface SampleData : NSObject
@property (nonatomic,strong) NSString * treeName;
@property (nonatomic,strong) NSString * treeDescription;
@end
SampleData.m
#import "SampleData.h"
@implementation SampleData
@synthesize treeName, treeDescription;
@end
SampleDataDOA.h
#import <Foundation/Foundation.h>
#import "SampleData.h"
@interface SampleDataDAO : NSObject
@property (nonatomic,strong) NSMutableArray *someDataArray;
-(NSMutableArray *)PopulateDataSource;
@end
SampleDataDOA.m
#import "SampleDataDAO.h"
@implementation SampleDataDAO
@synthesize someDataArray;
-(NSMutableArray *)PopulateDataSource
{
someDataArray= [[NSMutableArray alloc]initWithCapacity:3];
SampleData * mydata= [[SampleData alloc]init];
mydata.treeName = @"Oak";
mydata.treeDescription = @"an oak is a tree or shurb bla bla bla";
[someDataArray addObject:mydata];
mydata=nil;
mydata=[[SampleData alloc]init];
mydata.treeName=@"Douglas Fir";
mydata.treeDescription=@"Douglas Fir are medium-size to extremely large evergreen trees";
[someDataArray addObject:mydata];
mydata=nil;
mydata=[[SampleData alloc]init];
mydata.treeName=@"Sugar Maple";
mydata.treeDescription=@"Sugar Maple is a species of Maple. Sugar Maple is best known for it's sweet leaves as it contain natural sugar and is extremely healthy and beneficial to our health";
[someDataArray addObject:mydata];
mydata=nil;
return someDataArray;
}
@end
TableViewController.h
#import <UIKit/UIKit.h>
#import "SampleDataDAO.h"
#import "SampleData.h"
#import "ViewController.h"
@interface TableViewController : UITableViewController
@property(nonatomic,strong) SampleDataDAO* daoDS;
@property (nonatomic,strong) NSMutableArray *ds;
@end
TableViewController.m (error with method prepareForSegue)
#import "TableViewController.h"
@interface TableViewController ()
@end
@implementation TableViewController
@synthesize daoDS,ds;
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if( [[segue identifier] isEqualtoString:@"showDetail"]){
ViewController * detailViewController = [segue destinationViewController];
detailViewController.treeData=[self.ds objectAtIndex:[self.tableView indexPathForSelectedRow].row];
}
}
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
daoDS = [[SampleDataDAO alloc]init];
self.ds = daoDS.PopulateDataSource;
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return 3;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"treeCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
SampleData * sample = [self.ds objectAtIndex:indexPath.row];
cell.textLabel.text = sample.treeName;
NSLog(@"Cell Value %d %@", indexPath.row, cell.textLabel.text);
return cell;
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
@end
ViewController.h
#import <UIKit/UIKit.h>
#import "SampleData.h"
@interface ViewController : UIViewController
@property (strong, nonatomic) IBOutlet UITextView *treeInfo;
@property (nonatomic, strong) SampleData * treeData;
@end
ViewController.m
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize treeData, treeInfo;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
@end
P.S - the code are almost similar to the 1 in the website with the main difference being me having removed the picture portion of the code.
EDIT - error log file no visible @interface for 'NSString' declares the selector 'isEqualtoString:' if( [[segue identifier] isEqualtoString:@"showDetail"]){
the error underline is at the "[[" Hope this is a helpful hint to you guys finding out the real error ._.
