I'm wondering how to call an IBAction from another IBAction.
What I want to do is when I touch a button on previousPage, the title of the nextPage button to change.
In other words I have these IBActions:
- (IBAction)nextPageButtonItemPressed:(UIBarButtonItem *)sender
{
...
}
- (IBAction)previousParageButtonItemPressed:(UIButton *)sender
{
//This is what i want to do
[self nextPageButtonItemPressed:sender.title = #"Next Page"];
}
I have also created an IBOutlet of previousPage.
#property (strong, nonatomic) IBOutlet UIToolbar *nextPageOutlet;
But I can't find the way to do this.
P.S. The nextPage is a button in UIToolbar.
For this, you need to have your UIButton as an IBOutlet property.
So something like:
#property (nonatomic, retain) IBOutlet UIBarButtonItem *previousButton;
#property (nonatomic, retain) IBOutlet UIBarButtonItem *nextButton;
- (IBAction)nextPageButtonItemPressed:(UIBarButtonItem *)sender
{
...
}
- (IBAction)previousPageButtonItemPressed:(UIBarButtonItem *)sender
{
self.nextButton.title = #"Next Page";
}
Related
I currently have a header that displays a name, time, and a couple of buttons. This header should only appear if an appointment is selected in a dashboard, which is irrelevant here. However, once i logout and log back in, with no patient selected, the header view is displayed. I think this is because I did not deallocate the appointment object, and i'm not sure how to do that (i'm new to iOS programming).
Here's my code:
So I have the interface
#interface DashboardVC : CommonVC <UIActionSheetDelegate, HeaderViewDelegate, PracticeServiceDelegate> {
IBOutlet HeaderView *_headerView;
}
And inside the HeaderView object i have these properties:
#property (strong, nonatomic) CCAppointment *appointment;
#property (strong, nonatomic) IBOutlet UIButton *backButton;
#property (strong, nonatomic) IBOutlet UIView *currentPatientView;
#property (strong, nonatomic) IBOutlet UIImageView *avatarImageView;
#property (strong, nonatomic) IBOutlet UILabel *patientNameLabel;
I then, in dashboard VC, want to deallocate, but i'm not sure how... this is what i have:
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
How do I deallocate the properties so that the headerVIew does not show up?
if you want to destroy _headerView try:
[_headerView removeFromSuperview];
_headerView = nil;
I would like to modify the text property of a UILabel (nameLbl) but don't know what i am wrong.
I have 2 Views, the first is a ViewController, the second is ProfileViewController. The ProfileViewController fill some field of user profile this data are passed to ViewController and showed in UIlabel.
The issue is I can't show the datas in the ViewController.
What am I get wrong?
---ViewController.h---
#interface ViewController : UIViewController
{
IBOutlet ViewController *profile;
IBOutlet UILabel *nameLbl, *celLbl, *cfLbl;
IBOutlet UITextField *nameTF;
}
#property (nonatomic, retain) IBOutlet ViewController *profile;
#property (retain, nonatomic) IBOutlet UILabel *nameLbl, *celLbl, *cfLbl;
#property (nonatomic, retain) IBOutlet UITextField *nameTF;
-(void) setUser: (NSString *) name:(NSString *) cel:(NSString *) cf;
#end
---ViewController.m---
#synthesize nameLbl, celLbl, cfLbl;
-(void) setUser:(NSString *)name:(NSString *)cel:(NSString *)cf
{
nameLbl = [[UILabel alloc] init];
[nameLbl setText:name];
}
this is the connection inspector
https://drive.google.com/file/d/0Bz7WcQmZNuFLMWt3QUo1Tk5XUW8/edit?usp=sharing
Remove
nameLbl = [[UILabel alloc] init];
from your code it seems that the nameLbl UILabel has already been initialized from nib, and you are creating a new memory reference, so its not working.
I found a lot of how to use methods of chlidViewController. But I couldn't find how to change and set value of uitextfield and uiswitch from childViewController.
ChildViewController.h:
#protocol VVInformationTableViewControllerDelegate;
#interface VVInformationTableViewController : UITableViewController
#property (weak, nonatomic) id<VVInformationTableViewControllerDelegate> delegate;
#property (weak, nonatomic) IBOutlet UITextField *nameTextField;
#property (weak, nonatomic) IBOutlet UITextField *surnameTextField;
#property (weak, nonatomic) IBOutlet UITextField *emailTextField;
#property (weak, nonatomic) IBOutlet UITextField *locationTextField;
#property (weak, nonatomic) IBOutlet UITextField *headlineTextField;
#property (weak, nonatomic) IBOutlet UITextField *positionTextField;
#property (weak, nonatomic) IBOutlet UITextField *companyTextField;
#property (weak, nonatomic) IBOutlet UISwitch *messagesEnable;
#end
ParentViewControler.m:
- (void)viewDidLoad
{
self.currentAttendee = [VVAPIClient sharedClient].currentUser;
NSParameterAssert(self.currentAttendee);
[super viewDidLoad];
[self.navigationController setNavigationBarHidden:YES];
self.infoTableController = [[VVInformationTableViewController alloc] initWithNibName:#"InformationTableViewController" bundle:nil];
[self addChildViewController:self.infoTableController];
}
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
self.infoTableController.nameTextField.text = self.currentAttendee.firstName?:#"";
self.infoTableController.surnameTextField.text = self.currentAttendee.lastName?:#"";
self.infoTableController.emailTextField.text = self.currentAttendee.email?:#"";
self.infoTableController.locationTextField.text = self.currentAttendee.location?:#"";
self.infoTableController.headlineTextField.text = self.currentAttendee.headline?:#"";
self.infoTableController.positionTextField.text = self.currentAttendee.position?:#"";
self.infoTableController.companyTextField.text = self.currentAttendee.company?:#"";
}
-(void)viewDidLayoutSubviews{
self.infoTableController.messagesEnable.on = NO;
self.infoTableController.nameTextField.tag = 0;
self.infoTableController.surnameTextField.tag = 1;
self.infoTableController.emailTextField.tag = 2;
self.infoTableController.locationTextField.tag = 3;
self.infoTableController.headlineTextField.tag = 5;
self.infoTableController.positionTextField.tag = 6;
self.infoTableController.companyTextField.tag = 7;
}
Thanks for help.
As david says in his comment, don't.
It violates the encapsulation of the other view controller, and leads to spaghetti code.
You should treat another VCs (View Controller's) views as private.
What you should do is add properties to the child view controller to hold strings and other state data that you need to display. Then in your child view controller's viewWillAppear method, you can take the settings and apply them to your view hierarchy.
In your case, since what you're doing is displaying a whole bunch of information about "currentAttendee", (which I guess is a model object) you might want to think about passing a pointer to the whole attendee object to the child, and letting it display the information itself.
Or, of the child can edit the object, you might want to pass a copy, and use a delegate method when you want to commit the changes made in the child, or simply return if you want to discard changes.
I set UIButton myButton to hidden on viewDidLoad
In a splitviewcontroller I have it so that when I click on a tablecell, certain items unhide which works great for my textviews but my button is giving me this:
ERROR: member reference base type void is not a structure or union
Here is some snippet of code:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0) {
detailViewController.myButton.hidden= NO;
detailViewController.textView1.hidden= NO;
detailViewController.textView2.hidden= NO;
}
in the .h file there is
#property (strong, nonatomic) DetailViewController *detailViewController;
in DetailViewController is where the button and textviews are declared as
#interface DetailViewController : UIViewController <UISplitViewControllerDelegate>{
IBOutlet UIButton *myButton;
IBOutlet UITextView *textView1;
IBOutlet UITextView *textView2;
}
#property (strong, nonatomic) IBOutlet UITextView *textView1;
#property (strong, nonatomic) IBOutlet UITextView *textView2;
#property (strong, nonatomic) UIButton *myButton;
-(IBAction)myButtonPressed;
#end
IBAction myButtonPressed in the DetailViewController.m is
-(IBAction)myButtonPressed{
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
RootViewController *RVC = [storyboard instantiateViewControllerWithIdentifier:#"Root"];
[UIApplication sharedApplication].delegate.window.RootViewController = RVC;
}
Anyone have any thoughts on why the button won't behave like the other two will? Is it because I gave it an IBAction??
You forget to Put IBOutlet at the first of button creation it should be
#property (strong, nonatomic) IBOutlet UIButton *myButton; OR
#property (nonatomic, weak) IBOutlet UIButton *myButton;
And give proper connection to file's owner.
Button should be a IBOutlet and please correct it and update XIB references and you should be good.
#property (nonatomic, weak) IBOutlet UIButton * myButton;
link this to UIButton is XIB if you are using one.
i'm new to developing with xcode,and i'm following the apple's tutorial:"Second's ios app tutorial". I've add a button to my scene "Add Sighting View Controller",and i want to switch this view to another(BirdsViewController)that have a list of bird's names. in my storyboard i've create a segue between the button and BirdsViewController and also connect the button to touch up inside, but when i run the app the button doesn't appear.Can anybody help me?thank you.
here's my code(i don't have implemented any other methods):
AddSightingViewController.h
#class BirdSighting;
#interface AddSightingViewController : UITableViewController
#property (weak, nonatomic) IBOutlet UITextField *birdNameInput;
#property (weak, nonatomic) IBOutlet UITextField *locationInput;
#property (strong, nonatomic) BirdSighting *birdSighting;
#property (strong, nonatomic) UIButton *showBirds;
-(IBAction)displayBirds:(id)sender;
AddSightingViewController.m
#import "AddSightingViewController.h"
#import "BirdSighting.h"
#import "BirdsViewController.h"
#import <UIKit/UIKit.h>
#class BirdSighting;
#interface AddSightingViewController ()
#end
#implementation AddSightingViewController
#synthesize showBirds;
-(BOOL)textFieldShouldReturn:(UITextField *)textField {
if((textField == self.birdNameInput) || (textField == self.locationInput)) {
[textField resignFirstResponder];
}
return YES;
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if([[segue identifier] isEqualToString:#"ReurnInput"]) {
if ([self.birdNameInput.text length] || [self.locationInput.text length])
{
BirdSighting *sighting;
NSDate *today = [NSDate date];
sighting = [[BirdSighting alloc] initWithName:self.birdNameInput.text
location:self.locationInput.text date:today];
self.birdSighting = sighting;
}
}
}
BirdsViewController *viewController;
-(IBAction)showBirds:(id)sender {
viewController =
[[BirdsViewController alloc]
initWithNibName:#"BirdsViewController" bundle:nil];
[[self navigationController] pushViewController:viewController animated:YES];
}
I dont see any allocation and adding of button as subview to the viewcontroller's view.
I think in the app like other textfields, button is also IBOutlet. Declare button as an IBOutlet and connect the outlet to the button in the interface builder file.
#property (weak, nonatomic) IBOutlet UIButton *showBirds;
Or allocate the button and add as subview to viewcontroller's view.