I present the view controller like this:
FBViewController *fbViewController =[[FBViewController alloc] initWithNibName:#"FBViewController" bundle:nil];
fbViewController.label.text=#"hello"; // I set the value of the property label which is the outlet
[self presentModalViewController:fbViewController animated:YES];
FBViewController.h:
#import <UIKit/UIKit.h>
#interface FBViewController : UIViewController
#property (weak, nonatomic) IBOutlet UILabel *label;
#end
FBViewController.m:
...
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(#"%#", self.label.text); // Here instead of "hello" i get the value which was in nib file.
}
...
The question is how to set the value of the label?
You can pass the NSString retrieve text to assign label modalview controller:
FBViewController *fbViewController =[[FBViewController alloc] initWithNibName:#"FBViewController" bundle:nil];
fbViewController.labeltext=#"Your Text";
[self presentModalViewController:fbViewController animated:YES];
FBViewController.h
#interface FBViewController : UIViewController {
NSString *labeltext;
}
#property (nonatomic, retain) NSString *labeltext;
and use view to load method in FBViewController.m
- (void)viewDidLoad {
label1.text=labeltext;
}
Related
I have a TableViewController subclass with one prototype cell designed in storyboard. Then I am passing the references to the class header etc and for some reason it fails to compile it. But the connections seem fine. I provide you the code and pictures of the build errors and the storyboard. I am using Xcode 4.3.3. Any help is really appreciated.
favTable.h
#import <UIKit/UIKit.h>
#interface favTable : UITableViewController <NSFetchedResultsControllerDelegate>
{
NSFetchedResultsController *fetchedResultsController;
NSManagedObjectContext *managedObjectContext;
NSArray *favArr;
NSMutableArray *favName;
NSMutableArray *favScore;
}
#property (nonatomic, retain) NSArray *favArr;
#property (nonatomic, retain) NSManagedObjectContext *managedObjectContext;
#property (nonatomic, strong) NSMutableArray *favName;
#property (nonatomic, strong) NSMutableArray *favScore;
#property (nonatomic, retain) NSFetchedResultsController *fetchedResultsController;
#property (strong, nonatomic) IBOutlet UITableViewCell *celldes;
#property (strong, nonatomic) IBOutlet UIImageView *cellimage;
#property (strong, nonatomic) IBOutlet UILabel *cellname;
#property (strong, nonatomic) IBOutlet UILabel *cellmanu;
#property (strong, nonatomic) IBOutlet UILabel *cellscore;
#end
favTable.m
#import "favTable.h"
#import "ecoAppDelegate.h"
#interface favTable ()
#end
#implementation favTable
#synthesize favArr;
#synthesize managedObjectContext;
#synthesize fetchedResultsController;
#synthesize favName;
#synthesize favScore;
#synthesize celldes;
#synthesize cellimage;
#synthesize cellname;
#synthesize cellmanu;
#synthesize cellscore;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = #"Favorites";
self.navigationController.navigationBar.translucent = NO;
// passing the array of addedtofavorites to the total one with all favorites
self.managedObjectContext = ((ecoAppDelegate *) [UIApplication sharedApplication].delegate).managedObjectContext;
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription
entityForName:#"FavoritesInfo" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
fetchRequest.resultType = NSDictionaryResultType;
[fetchRequest setPropertiesToFetch:[NSArray arrayWithObjects:#"name", nil]];
NSError *error=nil;
self.favArr=[[self.managedObjectContext executeFetchRequest:fetchRequest error:&error]mutableCopy];
if (error!=nil) {
NSLog(#" fetchError=%#,details=%#",error,error.userInfo);
}
self.favName = [[self.favArr valueForKey:#"name"] mutableCopy];
self.favScore = [[self.favArr valueForKey:#"score"] mutableCopy];
}
- (void)viewDidUnload
{
[self setCelldes:nil];
[self setCellimage:nil];
[self setCellname:nil];
[self setCellmanu:nil];
[self setCellscore:nil];
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
// Return the number of rows in the section.
return [favName count];;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
// Configure the cell...
UITableViewCell* cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cellname.text = #"Test";
return cell;
}
#end
I moved manually the IB outlets into a separate custom cell class and then linked the references to the storyboard (maybe this is fixed in newer versions)
Then applied that cell style in the prototype cell and simply changed the content of the UI items of my cell using the identifier (no tag was needed)
my program always an error of threads.
error that appears at compile time
http://imgur.com/6rGkwKd
1. My .h
import
#interface PerfilViewController : UIViewController
<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
#property (weak, nonatomic) IBOutlet UIImageView *fotoPerfil;
#property (weak, nonatomic) IBOutlet UIButton *botaoSalvarFoto;
#property (nonatomic) UIImagePickerController *pegarFoto;
-(IBAction)salvarFoto:(UIButton *)sender;
#end
2. My .m
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
_pegarFoto = [[UIImagePickerController alloc]init];
_pegarFoto.delegate = self;
_pegarFoto.sourceType = UIImagePickerControllerSourceTypeCamera;
}
-(IBAction)salvarFoto:(UIButton *)sender {
[self presentViewController:_pegarFoto animated:YES completion:nil];
}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)img editingInfo:(NSDictionary *)editInfo {
_fotoPerfil.image = img;
[[picker parentViewController] dismissViewControllerAnimated:YES completion:nil];
}
I've got a problem with xcode.
I'm a noob with object-c and xcode so... please help.
I have 2 Viewcontrollers: ViewController (with .m/.h) and HighScores (with .m/.h).
In HighScores I have put a label called first. And in ViewController I have a UITextField called *textField. I want the text in textField to be in the label when I enter the text AND when the score of the game already played is grater than the text already existing in the label ('first').
So,
This is how my HighScore.h looks like:
#import <UIKit/UIKit.h>
#interface HighScores: UIViewController {
IBOutlet UILabel *first;
}
#end
and this is ViewController.m:
#import "ViewController.h"
#import "HighScore.h"
...
NSString *myString = [HighScores.first];
if (score.text > myString) {
NSString *string = [textField text];
[HighScores.first setText:string]
but xcode says there's an error when I type "first" after the dot '.'... How can I make it if I want xCode to recognize the "first" label from HighScore UIViewController in VewController UiViewController?
Thanks!
In your code "first" is a UILabel , it will be generated when view of highScores get loaded .
Because it is a IBOUtlet.
Secondly you are trying yo access with class name .
Make a instance of HighScore class first and than try to acess label "first".
#import <UIKit/UIKit.h>
#interface HighScores: UIViewController
#property (nonatomic , strong)UILabel *firstLabel ;
#end
#implementation HighScores
- (id)initWithNibName:(NSString *)nibName bundle:(NSBundle *)nibBundle
{
self.firstLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 50)];
[self.view addSubview self.firstlabel];
}
#end
than in ViewController.m
HighScore * highscoreObject = [[HighScore alloc]init];
NSString *mystring = [highscoreObject.firstLabel text];
if (score.text > mystring) {
[highscoreObject.firstLabel setText:score.text];
{
Lets use notification , if you are confused in here:
In this case you can also use IBoutlet.
We will throw an notification with the string to be set and read the notification in HighScores and set the label with the string send.
In ViewController.m
if (score.text > myString) {
NSString *string = [textField text];
[[NSNotificationCenter defaultCenter] postNotificationName:#"update" object:string];
}
#interface HighScores: UIViewController
#property (nonatomic , strong) IBOutlet UILabel *firstLabel ;
#end
and in HighScores.m
#implementation HighScores
- (void)viewDidLoad
{
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] removeObserver:self];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(changetext:) name:#"update" object:nil];
}
- (void) changetext:(NSNotification *)notification {
NSLog(#"Received");
self.firstLabel.text = [notification object];
}
When I try to run it though, I get an error which says "Semantic issue: Property 'text' not found on object of type 'UISlider'"
What's wrong here?
Here is the code from the header file:
#import <UIKit/UIKit.h>
#interface BIDViewController : UIViewController
#property (strong, nonatomic) IBOutlet UITextField *nameField;
#property (strong, nonatomic) IBOutlet UITextField *numberField;
#property (strong, nonatomic) IBOutlet UISlider *sliderLabel;
- (IBAction)textFieldDoneEditing:(id)sender;
- (IBAction)backgroundTap:(id)sender;
- (IBAction)sliderChanged:(id)sender;
#end
Implementation file:
#import "BIDViewController.h"
#implementation BIDViewController
#synthesize sliderLabel;
#synthesize nameField;
#synthesize numberField;
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)viewDidUnload
{
[self setNameField:nil];
[self setNumberField:nil];
[self setSliderLabel:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (IBAction)textFieldDoneEditing:(id)sender
{
[sender resignFirstResponder];
}
- (IBAction)backgroundTap:(id)sender
{
[nameField resignFirstResponder];
[numberField resignFirstResponder];
}
- (IBAction)sliderChanged:(id)sender
{
UISlider *slider = (UISlider *)sender;
int progressAsInt = (int)roundf(slider.value);
sliderLabel.text = [NSString stringWithFormat:#"%d",progressAsInt];
}
#end
I suspect your sliderLabel has been declared as an object of class UISlider, when it should be UILabel. Can you verify the sliderLabel's #property declaration in your header file?
I have the same message on NSManagedObject. My solution is set "Always Search User Paths" in "Search Paths" of target's Build Settings to "No"
Hope that could help too.
I'm trying to build an app where I have a TabBarController with 4 entries.
When I select the first entry, a view with a UITableView shows up.
This TableView is filled with several entries.
What I would like to do is:
When an entry out of that UITableView gets selected, another view should show up; a detailview.
.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == 0) {
if(self.secondView == nil) {
SecondViewController *secondViewController = [[SecondViewController alloc] initWithNibName:#"SecondView" bundle:[NSBundle mainBundle]];
self.secondView = secondViewController;
[secondViewController release];
}
// Setup the animation
[self.navigationController pushViewController:self.secondView animated:YES];
}
}
.h
#import <UIKit/UIKit.h>
#import "SecondViewController.h"
#interface FirstViewController : UIViewController {
SecondViewController *secondView;
NSMutableArray *myData;
}
#property (nonatomic, retain) SecondViewController *secondView;
#property (nonatomic, copy, readwrite) NSMutableArray* myData;
#end
This is what I have so far.
Unfortunately.. the code runs, bit the second view does not show up.
Is your first view controller wrapped in a UINavigationController? When you set up your UITabBarController, you should add UINavigationControllers rather than your UIViewController subclasses, e.g.:
FirstViewController *viewControl1 = [[FirstViewController alloc] init];
UINavigationController *navControl1 = [[UINavigationController alloc] initWithRootViewController:viewControl1];
UITabBarController *tabControl = [[UITabBarController alloc] init];
tabControl.viewControllers = [NSArray arrayWithObjects:navControl1, <etc>, nil];
//release everything except tabControl
Also, based on your code, you don't need to keep your secondViewController as an ivar, since UINavigationController automatically retains its view controllers (and retaining it when you're not displaying it will use up unnecessary memory).